This file contains the text of the FlexeLint/PC-lint error messages. It
is to be used in conjunction with licensed FlexeLint/PC-lint software.
Copyright (C) 1985-2009 Gimpel Software, All rights reserved
Gimpel Software * 3207 Hogarth Lane * Collegeville, PA 19426
Phone (610) 584-4261 * FAX (610) 584-4266 * www.gimpel.com
19. MESSAGES
19.1 Syntax Errors
19.2 Internal Errors
19.3 Fatal Errors
19.4 Warning Messages
19.5 Informational Messages
19.6 Elective Notes
19.7 C++ Syntax Errors
19.8 Additional Internal Errors
19.9 C++ Warning Messages
19.10 C++ Informational Messages
19.11 C++ Elective Notes
Most error messages have an associated error number. By looking up the
number in the list below you can obtain additional information about the
cause of the error. This information is also available from a
self-extracting executable msg.exe, found on the PC-lint
distribution diskette, which produces the machine-readable ASCII file
msg.txt. For FlexeLint users, the file msg.txt can be found on
the FlexeLint Supplementary diskette.
Messages numbered 1000 and higher pertain generally to C++. This is
summarized in the table below.
After a possible 1000 is subtracted off, the remainder lies in the range
0-999. Remainders in the range 1-199 are syntax errors, 200-299 are PC-lint/FlexeLint
internal errors and should never occur, 300-399 are fatal errors usually
brought about by exceeding some limit, 400-699 are warning messages that
indicate that something is likely to be wrong with the program being
examined. Remainders in the range 700-899 designate informational messages.
These may be errors but they also may represent legitimate programming
practices depending upon personal programming style. Remainders in the
range 900-999 are called "Elective Notes". They are not automatically
output. You may examine the list to see if you wish to be alerted to
any of them.
C C++ Warning Level
Syntax Errors 1 - 199 1001 - 1199 1
Internal Errors 200 - 299 1200 - 1299 0
Fatal Errors 300 - 399 0
Warnings 400 - 699 1400 - 1699 2
Informational 700 - 899 1700 - 1899 3
Elective Notes 900 - 999 1900 - 1999 4
Glossary
A few of the terms used in the commentary below are:
argument The actual argument of a function as opposed to a dummy (or
formal) parameter of a function (see parameter).
arithmetic Any of the integral types (see below) plus float, double, and
long double.
Boolean In general, the word Boolean refers to quantities that can be
either true or false. An expression is said to be Boolean
(perhaps it would be better to say 'definitely Boolean') if it
is of the form: operand op operand where op is a relational (>
>= < <=), an equality operator (== !=), logical And (&&) or
logical Or (||). A context is said to require a Boolean if it
is used in an if or while clause or if it is the 2nd
expression of a for clause or if it is an argument to one of
the operators: && or ||. An expression needn't be definitely
Boolean to be acceptable in a context that requires a Boolean.
Any integer or pointer is acceptable.
declaration Gives properties about an object or function (as opposed to
a definition).
definition That which allocates space for an object or function (as
opposed to a declaration) and which may also indicate
properties about the object. There should be only one
definition for an object but there may be many declarations.
integral A type that has properties similar to integers. These include
char, short, int, and long and the unsigned variations of any
of these.
scalar Any of the arithmetic types plus pointers.
lvalue Is an expression that can be used on the Left hand side of an
assignment operator (=). Some contexts require lvalues such
as autoincrement (++) and autodecrement (--).
macro An abbreviation defined by a #define statement. It may or may
not have arguments.
member Elements of a struct and of a union are called members.
module That which is compiled by a compiler in a single independent
compilation. It typically includes all the text of a .c (or a
.cpp or .cxx, etc.) file plus any text within any #include
file(s).
parameter A formal parameter of a function as opposed to an actual
argument (see argument).
Message Parameters
Some of the messages are parameterized with one or more of the following
italicized names:
Char Some character
Context Specifies one of several contexts in which an assignment can
be made. Can be one of:
o assignment -- refers to an explicit assignment operator.
o return -- refers to the implied assignment of a return
statement. The type of the expression is converted implicitly
to the type of the function.
o initialization -- refers to the assignment implied by an
initialization statement.
o arg. no.... -- refers to the implied assignment of an argument
in the presence of a prototype. The type of the expression is
implicitly converted to the type within a prototype.
o arg. 'this' -- refers to the implied argument of a member
function call.
FileName A filename. Messages containing this parameter can be
suppressed with the -efile( ... ) option.
Integer Some integer
Invocation A function call with argument types. To suppress a message
containing an Invocation you need the complete call, not just
the function name. For example, the call f(1) could result
in Error 1024 parameterized by 'f(int)'. To suppress this
message you could use -esym(1024,f(int)). You could also use
wild cards as in -esym(1024,f*).
Kind A list of control structures.
Location A line number followed optionally by a filename (if different
from the current) and/or a module name if different from the
current.
Name A string, usually an identifier, that can be suppressed with a
-esym but not with -elibsym.
String A sequence of characters identified further in the message
description.
Symbol The name of a user identifier referring to a C or C++ object
such as variable, function, structure, etc. Messages
containing this parameter can be suppressed with the -esym(
... ) option. For C++, if Symbol is the name of a function
the full function signature (including parameters) is given.
Error suppression with -esym does not require (nor want) the
parameters.
Type A type or a top type base is provided. A top type base is one
of pointer, function, array, struct, union, or enum.
TypeDiff Specifies the way in which one type differs from another.
Because of type qualification, function prototypes, and type
compounding, it may not be obvious how two types differ.
Also, see the -etd option to inhibit errors based on type
differences. TypeDiff can be one or more of:
o basic -- The two types differ in some fundamental way such as
double versus int.
o count -- Two function types differ in the number of arguments.
o ellipsis -- Two function types differ in that one is
prototyped using an ellipsis and the other is not prototyped.
See Section 15.8 Plain Vanilla Functions.
o incomplete -- At least one of the types is only partially
specified such as an array without a dimension or a function
without a prototype.
o nominal -- The types are nominally different but are otherwise
the same. For example, int versus long where these are the
same size or double versus long double where these are the
same size. The two types are either both integral or both
float or are functions that return types or have arguments
that differ nominally. If long is the same size as int then
unsigned long will differ from int both as nominal and as
signed/unsigned. If not the same size, then the difference is
precision.
o origin -- The types are not actually different but have
different origins. For example a struct is defined in two
separate modules rather than in one header file. If for some
reason you want to do this then use the option -etd(origin).
o precision -- Two arithmetic types differ in their precision
such as int vs. long where these are different sizes.
o promotion -- Two function types differ in that one is
prototyped with a char, short or float type and the other is
not prototyped.
o ptrs to... -- Pointers point to different types, some TypeDiff
code follows.
o ptrs to incompatible types -- Pointers point to types which in
turn differ in precision, count, size, ellipsis or promotion.
o qualification -- Qualifiers such as const, volatile, etc. are
inconsistent.
o signed/unsigned -- The types differ in that one is a signed
integral type and the other is unsigned of the same size, or
they are both functions that return types that differ in this
way, or they are both pointers to types that differ in this
way.
o size -- Two arrays differ in array dimension.
o strong -- two types differ in that one is strong and the other
is not the same strong type.
o void/nonvoid -- The two types differ in that one is void and
the other is not or, more frequently, they are both functions
returning types that differ in this respect or pointers to
types that differ in this respect.
o int/enum-- One type is an enum and the other is an int.
o Type = Type -- The two types in an assignment of some kind
differ in some basic way and no more information is available.
o Type vs. Type -- The two types differ in some basic way and no
more information is available.
Top |
19.1 C Syntax Errors
Top |
| 1 |
Unclosed Comment (Location) -- End of file was reached with an
open comment still unclosed. The Location of the open comment is
shown.
Top |
| 2 |
Unclosed Quote -- An end of line was reached and a matching
quote character (single or double) to an earlier quote character
on the same line was not found.
Top |
| 3 |
#else without a #if -- A #else was encountered not in the scope
of a #if, #ifdef or #ifndef.
Top |
| 4 |
Too many #if levels -- An internal limit was reached on the
level of nesting of #if statements (including #ifdef and
#ifndef).
Top |
| 5 |
Too many #endif's -- A #endif was encountered not in the scope
of a #if or #ifdef or #ifndef.
Top |
| 6 |
Stack Overflow -- One of the built-in non-extendable stacks has
been overextended. The possibilities are too many nested #if
statements, #includes statements (including all recursive
#include statements), static blocks (bounded by braces) or
#define replacements.
Top |
| 7 |
Unable to open include file: FileName -- FileName is the name of
the include file which could not be opened.
Top |
| 8 |
Unclosed #if (Location) -- A #if (or #ifdef or #ifndef) was
encountered without a corresponding #endif. Location is the
location of the #if.
Top |
| 9 |
Too many #else's in #if (Location) -- A given #if contained a
#else which in turn was followed by either another #else or a
#elif. The error message gives the line of the #if statement
that started the conditional that contained the aberration.
Top |
| 10 |
Expecting 'String' -- String is the expected token. The
expected token could not be found. This is commonly given when
certain reserved words are not recognized.
int __interrupt f();
will receive an Expecting ';' message at the f because it thinks
you just declared __interrupt. The cure is to establish a new
reserved word with +rw(__interrupt). Also, make sure you are
using the correct compiler options file.
Top |
| 11 |
Excessive Size -- The filename specified on a #include line had
a length that exceeded FILENAME_MAX characters.
Top |
| 12 |
Need < or " -- After a #include is detected and after macro
substitution is performed, a file specification of the form
or "filename" is expected.
Top |
| 13 |
Bad type -- A type adjective such as long, unsigned, etc. cannot
be applied to the type which follows.
Top |
| 14 |
Symbol 'Symbol' previously defined (Location) -- The named
object has been defined a second time. The location of the
previous definition is provided. If this is a tentative
definition (no initializer) then the message can be suppressed
with the +fmd flag.
Top |
| 15 |
Symbol 'Symbol' redeclared (TypeDiff) (Location) -- The named
symbol has been previously declared or defined in some other
module (location given) with a type different from the type given
by the declaration at the current location. The parameter
TypeDiff provides further information on how the types differ.
Top |
| 16 |
Unrecognized name -- A # directive is not followed by a
recognizable word. If this is not an error, use the +ppw option.
Top |
| 17 |
Unrecognized name -- A non-parameter is being declared where
only parameters should be.
Top |
| 18 |
Symbol 'Symbol' redeclared (TypeDiff) conflicts with Location --
A symbol is being redeclared. The parameter TypeDiff provides
further information on how the types differ. Location is the
location of the previous definition.
Top |
| 19 |
Useless Declaration -- A type appeared by itself without an
associated variable, and the type was not a struct and not a
union and not an enum. A double semi-colon can cause this as in:
int x;;
Top |
| 20 |
Illegal use of = -- A function declaration was followed by an =
sign.
Top |
| 21 |
Expected { -- An initializer for an indefinite size array must
begin with a left brace.
Top |
| 22 |
Illegal operator -- A unary operator was found following an
operand and the operator is not a post operator.
Top |
| 23 |
Expected colon -- A ? operator was encountered but this was not
followed by a : as was expected.
Top |
| 24 |
Expected an expression, found 'String' -- An operator was found
at the start of an expression but it was not a unary operator.
Top |
| 25 |
Illegal constant -- Too many characters were encountered in a
character constant (a constant bounded by ' marks).
Top |
| 26 |
Expected an expression, found 'String' -- An expression was not
found where one was expected. The unexpected token is placed in
the message.
Top |
| 27 |
Illegal character (0xhh) -- An illegal character was found in
the source code. The hex code is provided in the message. A
blank is assumed. If you are using strange characters in
identifier names you will get this message for which you may use
the -ident option.
Top |
| 28 |
Redefinition of symbol 'Symbol' Location -- The identifier
preceding a colon was previously declared at the Location given
as not being a label.
Top |
| 30 |
Expected a constant -- A constant was expected but not obtained.
This could be following a case keyword, an array dimension, bit
field length, enumeration value, #if expression, etc.
Top |
| 31 |
Redefinition of symbol 'Symbol' conflicts with Location -- A
data object or function previously defined in this module is
being redefined.
Top |
| 32 |
Field size (member 'Symbol') should not be zero -- The length of
a field was given as non-positive, (0 or negative).
Top |
| 33 |
Illegal constant -- A constant was badly formed as when an octal
constant contains one of the digits 8 or 9.
Top |
| 34 |
Non-constant initializer -- A non-constant initializer was found
for a static data item.
Top |
| 35 |
Initializer has side-effects -- An initializer with side effects
was found for a static data item.
Top |
| 36 |
Redefining the storage class of symbol 'Symbol' conflicts with
Location -- An object's storage class is being changed.
Top |
| 37 |
Value of enumerator 'Symbol' inconsistent (conflicts with
Location) -- An enumerator was inconsistently valued.
Top |
| 38 |
Offset of symbol 'Symbol' inconsistent (Location) -- A member of
a class or struct appears in a different position (offset from
the start of the structure) than an earlier declaration. This
could be caused by array dimensions changing from one module to
another.
Top |
| 39 |
Redefinition of symbol 'Symbol' conflicts with Location -- A
struct or union is being redefined.
Top |
| 40 |
Undeclared identifier 'Name' -- Within an expression, an
identifier was encountered that had not previously been declared
and was not followed by a left parenthesis. Name is the name of
the identifier.
Top |
| 41 |
Redefinition of symbol 'Symbol' -- A parameter of either a
function or a macro is being repeated.
Top |
| 42 |
Expected a statement -- A statement was expected but a token was
encountered that could not possibly begin a statement.
Top |
| 43 |
Vacuous type for variable 'Symbol' -- A vacuous type was found
such as the void type in a context that expected substance.
Top |
| 44 |
Need a switch -- A case or default statement occurred outside a
switch.
Top |
| 45 |
Bad use of register -- A variable is declared as a register but
its type is inconsistent with it being a register (such as a
function).
Top |
| 46 |
Field type should be int -- Bit fields in a structure should be
typed unsigned or int. If your compiler allows other kinds of
objects, such as char, then simply suppress this message.
Top |
| 47 |
Bad type -- Unary minus requires an arithmetic operand.
Top |
| 48 |
Bad type -- Unary * or the left hand side of the ptr (->)
operator requires a pointer operand.
Top |
| 49 |
Expected a type -- Only types are allowed within prototypes. A
prototype is a function declaration with a sequence of types
within parentheses. The processor is at a state where it has
detected at least one type within parentheses and so is expecting
more types or a closing right parenthesis.
Top |
| 50 |
Attempted to take the address of a non-lvalue -- Unary &
operator requires an lvalue (a value suitable for placement on
the left hand side of an assignment operator).
Top |
| 51 |
Expected integral type -- Unary ~ expects an integral type
(signed or unsigned char, short, int, or long).
Top |
| 52 |
Expected an lvalue -- autodecrement (--) and autoincrement (++)
operators require an lvalue (a value suitable for placement on
the left hand side of an assignment operator). Remember that
casts do not normally produce lvalues. Thus
++(char *)p;
is illegal according to the ANSI standard. This construct is
allowed by some compilers and is allowed if you use the +fpc
option (Pointer Casts are lvalues).
Top |
| 53 |
Expected a scalar -- Autodecrement (--) and autoincrement (++)
operators may only be applied to scalars (arithmetics and
pointers) or to objects for which these operators have been
defined.
Top |
| 54 |
Division by 0 -- The constant 0 was used on the right hand side
of the division operator (/) or the remainder operator (%).
Top |
| 55 |
Bad type -- The context requires a scalar, function, array, or
struct (unless -fsa).
Top |
| 56 |
Bad type -- Add/subtract operator requires scalar types and
pointers may not be added to pointers.
Top |
| 57 |
Bad type -- Bit operators ( &, | and ^ ) require integral
arguments.
Top |
| 58 |
Bad type -- Bad arguments were given to a relational operator;
these always require two scalars and pointers can't be compared
with integers (unless constant 0).
Top |
| 59 |
Bad type -- The amount by which an item can be shifted must be
integral.
Top |
| 60 |
Bad type -- The value to be shifted must be integral.
Top |
| 61 |
Bad type -- The context requires a Boolean. Booleans must be
some form of arithmetic or pointer.
Top |
| 62 |
Incompatible types (TypeDiff) for operator ':' -- The 2nd and
3rd arguments to ? : must be compatible types.
Top |
| 63 |
Expected an lvalue -- Assignment expects its first operand to be
an lvalue. Please note that a cast removes the lvaluedness of an
expression.
Top |
| 64 |
Type mismatch (Context) (TypeDiff) -- There was a mismatch in
types across an assignment (or implied assignment, see Context).
TypeDiff specifies the type difference.
Top |
| 65 |
Expected a member name -- After a dot (.) or pointer (->)
operator a member name should appear.
Top |
| 66 |
Bad type -- A void type was employed where it is not permitted.
If a void type is placed in a prototype then it must be the only
type within a prototype. (See error number 49.)
Top |
| 67 |
Can't cast from Type to Type -- Attempt to cast a non-scalar to
an integral.
Top |
| 68 |
Can't cast from Type to Type -- Attempt to cast a non-arithmetic
to a float.
Top |
| 69 |
Can't cast from Type to Type -- Bad conversion involving
incompatible structures or a structure and some other object.
Top |
| 70 |
Can't cast from Type to Type -- Attempt to cast to a pointer
from an unusual type (non-integral).
Top |
| 71 |
Can't cast from Type to Type -- Attempt to cast to a type that
does not allow conversions.
Top |
| 72 |
Bad option 'String' -- Was not able to interpret an option. The
option is given in String.
Top |
| 73 |
Bad left operand -- The cursor is positioned at or just beyond
either an -> or a . operator. These operators expect an
expression primary on their left. Please enclose any complex
expression in this position within parentheses.
Top |
| 74 |
Address of Register -- An attempt was made to apply the address
(&) operator to a variable whose storage class was given as
register.
Top |
| 75 |
Too late to change sizes (option 'String') -- The size option
was given after all or part of a module was processed. Make sure
that any option to reset sizes of objects be done at the
beginning of the first module processed or on the command line
before any module is processed.
Top |
| 76 |
can't open file String -- String is the name of the file. The
named file could not be opened for output. The file was destined
to become a PC-lint/FlexeLint object module.
Top |
| 77 |
Address of bit-field cannot be taken -- The address of a
bit-field cannot be taken. The rules of C only allow for taking
the address of a whole byte (a whole char).
Top |
| 78 |
Symbol 'Symbol' typedef'ed at Location used in expression -- The
named symbol was defined in a typedef statement and is therefore
considered a type. It was subsequently found in a context where
an expression was expected.
Top |
| 79 |
Bad type for % operator -- The % operator should be used with
some form of integer.
Top |
| 80 |
this use of ellipsis is not strictly ANSI -- The ellipsis should
be used in a prototype only after a sequence of types not after a
sequence of identifiers. Some compilers support this extension.
If you want to use this feature suppress this message.
Top |
| 81 |
struct/union not permitted in equality comparison -- Two
struct's or union's are being compared with one of == or !=.
This is not permitted by the ANSI standard. If your compiler
supports this, suppress this message.
Top |
| 82 |
return ; illegal with void function -- The ANSI standard
does not allow an expression form of the return statement with a
void function. If you are trying to cast to void as in return
(void)f(); and your compiler allows it, suppress this message.
Top |
| 83 |
Incompatible pointer types with subtraction -- Two pointers
being subtracted have indirect types which differ. You can get
PC-lint/FlexeLint to ignore slight differences in the pointers by
employing one or more of the -ep... options
Top |
| 84 |
sizeof object is zero or object is undefined -- A sizeof
returned a 0 value. This could happen if the object were
undefined or incompletely defined. Make sure a complete
definition of the object is in scope when you use sizeof.
Top |
| 85 |
Array 'Symbol' has dimension 0 -- An array (named Symbol) was
declared without a dimension in a context that required a
non-zero dimension.
Top |
| 86 |
Structure 'Symbol' has no data elements -- A structure was
declared (in a C module) that had no data members. Though legal
in C++ this is not legal C.
Top |
| 87 |
Expression too complicated for #ifdef or #ifndef -- By the rules
of C there should be only a single identifier following a #ifdef
or a #ifndef. You may also supply a validly constructed C (or
C++) comment.
Top |
| 88 |
Symbol 'Symbol' is an array of empty elements -- An array was
declared (in a C module) whose elements were each of 0 length.
Though legal in C++ this is not permitted C.
Top |
| 89 |
Argument or option too long ('String') -- The length of an
option (shown in String) exceeds an internal limit. Please try
to decompose the option into something smaller. At this writing
the limit is 610 characters.
Top |
| 90 |
Option 'String' is only appropriate within a lint comment -- The
indicated option is not appropriate at the command or the .lnt
level. For example if -unreachable is given on the command line
you will get this message.
Top |
| 91 |
Line exceeds Integer characters (use +linebuf) -- A line read
from one of the input files is longer than anticipated. By
default the line buffer size is 600 characters. Each time you
use the +linebuf option you can double this size. The size can
be doubled ad infinitum.
Top |
| 92 |
Negative array dimension or bit field length (Integer) -- A
negative array dimension or bit field length is not permitted.
Top |
| 93 |
New-line is not permitted within string arguments to macros -- A
macro invocation contains a string that is split across more than
one line. For example:
A( "Hello
World" );
will trigger this message. Some compilers accept this construct
and you can suppress this message with -e93 if this is your
current practice. But it is more portable to place the string
constant on one line. Thus
A( "Hello World" );
would be better.
Top |
| 95 |
Expected a macro parameter but instead found 'Name' -- The #
operator (or the non-standard extension to the # operator spelled
#@) was found within a macro definition but was not immediately
followed by a parameter of the macro as is required by the
standards. Name identifies the token immediately to the right of
the operator.
Top |
| 96 |
Unmatched left brace for String on Location -- The purpose of
this message is to report the location of a left curly brace that
is unmatched by a right curly brace. Such an unmatched left
curly can be far removed from the point at which the unbalance
was detected (often the end of the compilation unit). Providing
the location of the left curly can be extremely helpful in
determining the source of the imbalance.
Top |
| 98 |
Recovery Error (String) -- A recovery error is issued when an
inconsistent state was found while attempting to recover from a
syntactic error. The String provided in the message serves as a
clue to this inconsistent state. Since the presumptive cause of
the error is an earlier error, priority should be placed on
resolving the original error. This "Recovery Error" is meant
only to provide additional information on the state of the
parser.
Top |
| 101 |
Expected an identifier -- While processing a function
declarator, a parameter specifier was encountered that was not an
identifier, whereas a prior parameter was specified as an
identifier. This is mixing old-style function declarations with
the new-style and is not permitted. For example
void f(n,int m)
will elicit this message.
Top |
| 102 |
Illegal parameter specification -- Within a function declarator,
a parameter must be specified as either an identifier or as a
type followed by a declarator.
Top |
| 103 |
Unexpected declaration -- After a prototype, only a comma,
semi-colon, right parenthesis or a left brace may occur. This
error could occur if you have omitted a terminating character
after a declaration or if you are mixing old-style parameter
declarations with new-style prototypes.
Top |
| 104 |
Conflicting types -- Two consecutive conflicting types were
found such as int followed by double. Remove one of the types!
Top |
| 105 |
Conflicting modifiers -- Two consecutive conflicting modifiers
were found such as far followed by near. Remove one of the
modifiers!
Top |
| 106 |
Illegal constant -- A string constant was found within a
preprocessor expression as in
#if ABC == "abc"
Such expressions should be integral expressions.
Top |
| 107 |
Label 'Symbol' (Location) not defined -- The Symbol at the given
Location appeared in a goto but there was no corresponding label.
Top |
| 108 |
Invalid context -- A continue or break statement was encountered
without an appropriate surrounding context such as a for, while,
or do loop or, for the break statement only, a surrounding switch
statement.
Top |
| 109 |
The combination 'short long' is not standard, 'long' is assumed
-- Some compilers support the non-standard sequence short long.
This message reports, as an error, that this sequence is being
used. If you are required to use the construct then simply
suppress this message. As the message indicates, that type will
be presumed to be long.
Top |
| 110 |
Attempt to assign to void -- An attempt was made to assign a
value to an object designated (possibly through a pointer) as
void.
Top |
| 111 |
Assignment to const object -- An object declared as const was
assigned a value. This could arise via indirection. For
example, if p is a pointer to a const int then assigning to *p
will raise this error.
Top |
| 113 |
Inconsistent enum declaration -- The sequence of members within
an enum (or their values) is inconsistent with that of another
enum (usually in some other module) having the same name.
Top |
| 114 |
Inconsistent structure declaration for tag 'Symbol' -- The
sequence of members within a structure (or union) is inconsistent
with another structure (usually in some other module) having the
same name.
Top |
| 115 |
Struct/union not defined -- A reference to a structure or a
union was made that required a definition and there is no
definition in scope. For example, a reference to p->a where p is
a pointer to a struct that had not yet been defined in the
current module.
Top |
| 116 |
Inappropriate storage class -- A storage class other than
register was given in a section of code that is dedicated to
declaring parameters. The section is that part of a function
preceding the first left brace.
Top |
| 117 |
Inappropriate storage class -- A storage class was provided
outside any function that indicated either auto or register.
Such storage classes are appropriate only within functions.
Top |
| 118 |
Too few arguments for prototype -- The number of arguments
provided for a function was less than the number indicated by a
prototype in scope.
Top |
| 119 |
Too many arguments for prototype -- The number of arguments
provided for a function was greater than the number indicated by
a prototype in scope.
Top |
| 120 |
Initialization without braces of dataless type 'Symbol' -- There
was an attempt to initialize a nested object (e.g., an array
element) without braces. Additionally, that object type
possesses no data members.
class A { public: void f(); };
class B { public: A a; int k; } ;
A a[4] = { {}, {}, {}, {} }; // OK
B b = { , 34 }; // Error 120
Top |
| 121 |
Attempting to initialize an object of undefined type 'Symbol' --
The initialization of an object was attempted where that object
type has no visible definition. For example:
class Undefined u = { 5 };
Top |
| 122 |
Digit (Char) too large for radix -- The indicated character was
found in a constant beginning with zero. For example, 08 is
accepted by some compilers to represent 8 but it should be 010 or
plain 8.
Top |
| 123 |
Macro 'Symbol' defined with arguments at Location this is just a
warning -- The name of a macro defined with arguments was
subsequently used without a following '('. This is legal but may
be an oversight. It is not uncommon to suppress this message
(with -e123), because some compilers allow, for example, the
macro max() to coexist with a variable max.
Top |
| 124 |
Pointer to void not allowed -- A pointer to void was used in a
context that does not permit void. This includes subtraction,
addition and the relationals (> >= < <=).
Top |
| 125 |
Too many storage class specifiers -- More than one storage class
specifier (static, extern, typedef, register or auto) was found.
Only one is permitted.
Top |
| 126 |
Inconsistent structure definition 'Symbol' -- The named
structure (or union or enum) was inconsistently defined across
modules. The inconsistency was recognized while processing a
lint object module. Line number information was not available
with this message. Alter the structures so that the member
information is consistent.
Top |
| 127 |
Illegal constant -- An empty character constant ('') was found.
Top |
| 128 |
Pointer to function not allowed -- A pointer to a function was
found in an arithmetic context such as subtraction, addition, or
one of the relationals (> >= < <=).
Top |
| 129 |
declaration expected, identifier 'Symbol' ignored -- In a
context in which a declaration was expected an identifier was
found. Moreover, the identifier was not followed by '(' or a '['
Top |
| 130 |
Expected integral type -- The expression in a switch statement
must be some variation of an int (possibly long or unsigned) or
an enum.
Top |
| 131 |
syntax error in call of macro 'Symbol' at location Location --
This message is issued when a macro with arguments (function-like
macro) is invoked and an incorrect number of arguments is
provided. Location is the location of the start of the macro
call. This can be useful because an errant macro call can extend
over many lines.
Top |
| 132 |
Expected function definition -- A function declaration with
identifiers between parentheses is the start of an old-style
function definition (K&R style). This is normally followed by
optional declarations and a left brace to signal the start of the
function body. Either replace the identifier(s) with type(s) or
complete the function with a function body.
Top |
| 133 |
Too many initializers for aggregate 'Symbol' -- In a
brace-enclosed initializer, there are more items than there are
elements of the aggregate.
Top |
| 134 |
Missing initializer -- An initializer was expected but only a
comma was present.
Top |
| 135 |
comma assumed in initializer -- A comma was missing between two
initializers. For example:
int a[2][2] = { { 1, 2 } { 3, 4 } };
is missing a comma after the first right brace (}).
Top |
| 136 |
Illegal macro name -- The ANSI standard restricts the use of
certain names as macros. defined is on the restricted list.
Top |
| 137 |
constant 'Symbol' used twice within switch -- The indicated
constant was used twice as a case within a switch statement.
Currently only enumerated types are checked for repeated
occurrence.
Top |
| 138 |
Can't add parent 'Symbol' to strong type String; creates loop --
An attempt was made to add a strong type parent to a typedef
type. The attempt is either explicit (with the -strong option)
or implicit with the use of a typedef to a known strong type.
This attempt would have caused a loop in the strong parent
relationship. Such loops are simply not tolerated.
Top |
| 139 |
Can't take sizeof function -- There is an attempt to take the
sizeof a function.
Top |
| 140 |
Type appears after modifier -- Microsoft modifiers such as far,
_near, __huge, _pascal, etc. etc. modify the declarator to its
immediate right. It therefore should not appear before the type.
For example, you should write int pascal f(void); rather than
pascal int f(void);. Note that const and volatile differ from
the Microsoft modifiers. They may appear before or after the
type. After reporting the error an attempt is made to process
the modifiers as the programmer probably intended.
Top |
| 141 |
The following option has too many elements: 'String' -- The
indicated option (given by 'String') is too big. It most likely
consists of an itemized list that has too many items. You should
decompose the large option into two or more smaller options that
in sum are equivalent to the one large option.
Top |
| 143 |
Erroneous option: String -- An option contained information that
was inconsistent with itself or with an earlier option. The
String provided in the message explains more fully what the
problem is.
Top |
| 144 |
Non-existent return value for symbol 'Symbol', compare with
Location -- An attempt was made to use a non-existent return
value of the named function (identified by Symbol). It was
previously decided that the function did not return a value or
was declared with void.
Top |
| 145 |
Type expected before operator, void assumed -- In a context in
which a type is expected no type is found. Rather, an operator
'*' or '&' was encountered. The keyword void was assumed to have
preceded this operator.
Top |
| 146 |
Assuming a binary constant -- A constant of the form 0b... was
encountered. This was taken to be a binary constant. For
example, 0b100 represents the value 4. If your compiler supports
binary constants you may suppress this message.
Top |
| 147 |
sizeof takes just one argument -- An expression of the form
sizeof(a,b) was detected. A second argument is non standard and
has been used by some compilers to denote an option to the sizeof
operator. If your compiler has a use for the second argument
then suppress this message.
Top |
| 148 |
member 'Symbol' previously declared at Location -- The indicated
member was previously declared within the same structure or
union. Although a redeclaration of a function may appear benign
it is just not permitted by the rules of the language. One of the
declarations should be removed.
Top |
| 149 |
C++ construct 'String' found in C code -- An illegal construct
was found in C code. It looked as though it might be suitable
for C++. The quoted string identifies the construct further.
Top |
| 150 |
Token 'String' unexpected String -- An unexpected token was
encountered. The action taken, if any, is identified by the
second message parameter.
Top |
| 151 |
Token 'Name' inconsistent with abstract type -- In a context in
which an abstract type is allowed such as within a cast or after
a sizeof, and after starting to parse the abstract type, an
identifier was found. For example:
x = (int y) z;
Top |
| 152 |
Lob base file 'file name' missing -- The indicated file has been
specified as the base of lob production via the option
-lobbase(). On output, this message is given if the lob base is
missing. The situation is correctable by simply producing the
missing lob output. This will not be a problem given the
appropriate dependencies in the make file. On input, the most
likely cause of this message is an out-of-date base file. A hash
code within the lob file being read, did not match a similar code
already embedded within the base. The input lob file should be
considered in error and should be regenerated.
Top |
| 153 |
Could not create temporary file -- This message is produced when
generating a lob output file based upon some lob base file. When
the lob file is produced, it is first written to a temporary.
The temporary is generated by the C library function tmpnam().
Top |
| 154 |
Could not evaluate type 'String', int assumed -- String in the
message is the second argument to either a printf_code option or
a scanf_code option. When used, it was to be evaluated as a
type. Unfortunately the type could not be identified.
Top |
| 155 |
Ignoring { }'ed sequence within an expression, 0 assumed -- Some
compilers support what looks like a compound statement as a C/C++
expression. For example to define the absolute value of an
integer which guarantees that it will be read only once you may
use:
#define abs(a) { int b = a; b >= 0 ? b : -b; }
The last expression in the list is the result. To syntactically
support the construct without running amuck we recognize the
sequence and issue this message. If you want to use the facility
just suppress the message.
Top |
| 156 |
Braced initializer for scalar type 'Name' -- An example of an
initializer that will draw this complaint is as follows.
int s[] = { { 1 } };
After the compiler has seen the first curly it is expecting to
see a number (or other numeric expression). Compilers that
strictly adhere to the ISO C and C++ Standards will flag this as
ill-formed code.
Note that it is legal (but somewhat arcane) to employ a left
curly at the top-level when initializing an object of scalar
type. For example, the following is well-formed:
int i = { 0 }; // OK; initialize scalar i with 0.
char *t = { "bar" }; // OK; initialize scalar t with a pointer to
// a statically allocated array.
Also note: as the example above implies, this message can apply
to pointers to arrays of char; it does not apply to arrays.
Top |
| 157 |
No data may follow an incomplete array -- An incomplete array is
allowed within a struct of a C99 or C++ program but no data is
allowed to appear after this array. For example:
struct A { int x; int a[]; int b; };
This diagnostic is issued when the 'b' is seen.
Top |
| 158 |
Assignment to variable 'Symbol' (Location) increases capability
-- An assignment has been made to a variable that increases
capability. A typical capability increase is to remove const
protection as in the following example:
int *p;
const int *q;
p = q; // Error 158
If a capability increase is seen in situations other than an
assignment or if the variable is not available, Warning 605 is
issued. Please see the description of that message for further
information concerning capability increase. See also
Informational messages 1776 and 1778 in Section 13.8 C++
Informational Messages.
Top |
| 159 |
enum following a type is non-standard -- Normally two different
types are not permitted within the same type specification; this
will ordinarily result in Error 104. However, some compilers
support 'sized' enumerations wherein a scalar type can precede
the enum keyword. E.g.
char enum color { red, green, blue };
When the second type is an enum we do not issue a 104 but emit
Error 159 instead. By suppressing this message (with -e159) such
constructs will be supported.
Top |
| 160 |
The sequence '( {' is non standard and is taken to introduce a
GNU statement expression -- Lint encountered the sequence '( {'
in a context where an expression (possibly a sub-expression) is
expected.
int n = ({ // Error 160 here
int y = foo ();
int z;
if (y > 0)
z = y;
else z = - y;
z; })
// Now n has the last value of z.
The primary intention of this message is to alert the user to the
non-standard nature of this construct. The typical response is
to suppress the message and go on. But a few caveats are in
order.
Programmers who intend to work only with C code with the GNU
extensions may safely disable this diagnostic but C++ users
should think twice. This is partly for the reasons given in
GCC's documentation (see the section entitled "Statements and
Declarations in Expressions") and partly because the meaning of
'( {' will change in G++ when its maintainers implement
Initializer Lists (a new core language feature that is expected
to appear in the 2010 version of the ISO C++ Standard).
Top |
| 161 |
Repeated use of parameter 'Symbol' in parameter list -- The name
of a function parameter was repeated. For example:
void f( int n, int m, int n ) {}
will cause this message to be issued. Names of parameters for a
given function must all be different.
Top |
19.2 Internal Errors
Top |
| 2 |
Internal Error -- Some inconsistency or contradiction was
discovered in the PC-lint/FlexeLint system. This may or may not
be the result of a user error. This inconsistency should be
brought to the attention of Gimpel Software.
Top |
19.3 Fatal Errors
Errors in this category are normally fatal and suppressing the error is
normally impossible. However, those errors marked with an asterisk(*)
can be suppressed and processing will be continued. For example -e306
will allow reprocessing of modules.
Top |
| 301 |
Stack overflow -- There was a stack overflow while processing
declarations. Approximately 50 nested declarators were found.
For example, if a '/' followed by 50 consecutive '*'s were to
introduce a box-like comment and if the '/' were omitted, then
this message would be produced.
Top |
| 302 |
Exceeded Available Memory -- Main memory has been exhausted.
Top |
| 303 |
String too long (try +macros) -- A single #define definition or
macro invocation exceeded an internal limit (of 4096 characters).
As the diagnostic indicates the problem can be corrected with an
option.
Top |
| 304 |
Corrupt object file, code Integer, symbol=String -- A
PC-lint/FlexeLint object file is apparently corrupted. Please
delete the object module and recreate it using the -oo option.
The special code identifier number as well as a list of symbol
names are optionally suffixed to the message as an aid in
diagnosing the problem by technical support.
Top |
| 305 |
Unable to open module 'file name' -- file name is the name of
the file. The named module could not be opened for reading.
Perhaps you misspelled the name.
Top |
| 306 |
Previously encountered module 'FileName' -- FileName is the name
of the module. The named module was previously encountered.
This is probably a user blunder.
Top |
| 307 |
Can't open indirect file 'FileName' -- FileName is the name of
the indirect file. The named indirect file (ending in .lnt)
could not be opened for reading.
Top |
| 308 |
Can't write to standard out -- stdout was found to equal NULL.
This is most unusual.
Top |
| 309 |
#error ... -- The #error directive was encountered. The
ellipsis reflects the original line. Normally processing is
terminated at this point. If you set the fce (continue on
#error) flag, processing will continue.
Top |
| 310 |
Declaration too long: 'String...' -- A single declaration was
found to be too long for an internal buffer (about 2000
characters). This occurred when attempting to write out the
declaration using the -o... option. The first 30 characters of
the declaration is given in String. Typically this is caused by
a very long struct whose substructures, if any, are untagged.
First identify the declaration that is causing the difficulty.
If a struct or union, assign a tag to any unnamed substructures
or subunion. A typedef can also be used to reduce the size of
such a declaration.
Top |
| 312 |
Lint Object Module has obsolete or foreign version id: Integer
-- A lint object module was produced with a prior or different
version of PC-lint/FlexeLint. Delete the.lob file and recreate
it using your new version of PC-lint/FlexeLint.
Top |
| 313 |
Too many files -- The number of files that PC-lint/FlexeLint can
process has exceeded an internal limit. The FlexeLint user may
recompile his system to increase this limit. Look for symbol
FSETLEN in custom.h. Currently, the number of files is limited
to 4096.
Top |
| 314 |
Previously used .lnt file: FileName -- The indirect file named
was previously encountered. If this was not an accident, you may
suppress this message.
Top |
| 315 |
Exceeded message limit (see -limit) -- The maximum number of
messages was exceeded. Normally there is no limit unless one is
imposed by the -limit(n) option.
Top |
| 316 |
Error while writing to file "file name" -- The given file could
not be opened for output.
Top |
| 317 |
File encoding, String, not currently supported -- Lint detected
a byte order mark at the beginning of a file which indicated the
file is encoded in the given format. As of this writing, the
only formats supported to any extent are ASCII and UTF-8 (for
which Lint presumes ASCII encoding).
Top |
| 321 |
Declaration stack overflow -- An overflow occurred in the stack
used to contain array, pointer, function or reference modifiers
when processing a declarator.
Top |
| 322 |
Unable to open include file FileName -- FileName is the name of
the include file which could not be opened. Directory search is
controlled by options: -i +fdi and the INCLUDE environment
variable. This is a suppressible fatal message. If option -e322
is used, Error message 7 will kick in. A diagnostic will be
issued but processing will continue.
Top |
| 323 |
Token String too long -- In attempting to save a token for later
reuse, a fixed size buffer was exceeded (governed by the size
M_TOKEN).
Top |
| 324 |
Too many symbols Integer -- Too many symbols were encountered.
An internal limit was reached.
Top |
| 325 |
Cannot re-open file 'file name' -- In the case of a large number
of nested includes, files in the outer fringe need to be closed
before new ones are opened. These outer files then need to be
re-opened. An error occurred when attempting to re-open such a
file.
Top |
| 326 |
String 'String ...' too long, exceeds Integer characters -- A
string (first 40 characters provided in the message) exceeds some
internal limit (provided in the message). There is no antidote
to this condition in the form of an option. FlexeLint customers
may recompile with a redefinition of either M_STRING (maximum
string) or M_NAME (maximum name). To override the definition in
custom.h we suggest recompiling with an appropriate -dvar=value
option assuming your compiler supports the option.
Top |
| 328 |
Bypass header 'Name' follows a different header sequence than in
module 'String' which includes File1 where the current module
includes File2 -- This message is issued when a header is
#include'd that had previously been designated as bypass and it
has been determined that this header follows a different header
include sequence than in some other module. The name of the
other module is given by the second parameter of this message.
In order not to bury the programmer under a ton of header names,
we have made an effort to determine the precise point where the
two modules went their separate ways. The first include file
difference occurred when that other module included the header
identified by File1, whereas the current module was attempting to
include the header identified by File2. Each Filei is a pair of
parameters of the form 'String' (Location) where the location is
the point of the #include.
For example:
Module x.cpp:
#include "alpha.h"
#include "delta.h"
#include "beta.h"
#include "gamma.h"
Module y.cpp:
#include "alpha.h"
#include "beta.h"
#include "gamma.h"
When the include of "beta.h" occurs in module y.cpp (and if
beta.h has been designated as bypass), there will be a Fatal
Error 328 that the header sequence of module 'x.cpp' differs from
the current module in that the former module included 'delta.h'
at a point where the current module included 'beta.h'.
It was necessary to make this message a fatal error since
attempting to bypass headers that do not follow a consistent
header sequence is an act of folly. It is possible to continue
on after the 328 in hopes of picking up more inconsistencies in
other modules. This can be done using the +fce
(Continue-on-Error) flag.
Top |
19.4 C Warning Messages
Top |
| 401 |
symbol 'Symbol' not previously declared static at Location --
The indicated Symbol declared static was previously declared
without the static storage class. This is technically a
violation of the ANSI standard. Some compilers will accept this
situation without complaint and regard the Symbol as static.
Top |
| 402 |
static function 'Symbol' (Location) not defined -- The named
Symbol was declared as a static function in the current module
and was referenced but was not defined (in the module).
Top |
| 403 |
static symbol 'Symbol' has unusual type modifier -- Some type
modifiers such as _export are inconsistent with the static
storage class.
Top |
| 404 |
struct not completed within file 'FileName' -- A struct (or
union or enum) definition was started within a header file but
was not completed within the same header file.
Top |
| 405 |
#if not closed off within file 'FileName' -- An #if construct
was begun within a header file (name given) but was not completed
within that header file. Was this intentional?
Top |
| 406 |
Comment not closed off within file 'FileName' -- A comment was
begun within a header file (name given) but was not completed
within that header file. Was this intentional?
Top |
| 407 |
Inconsistent use of tag 'Symbol' conflicts with Location -- A
tag specified as a union, struct or enum was respecified as being
one of the other two in the same module. For example:
struct tag *p;
union tag *q;
will elicit this message.
Top |
| 408 |
Type mismatch with switch expression -- The expression within a
case does not agree exactly with the type within the switch
expression. For example, an enumerated type is matched against
an int.
Top |
| 409 |
Expecting a pointer or array -- An expression of the form i[...]
was encountered where i is an integral expression. This could be
legitimate depending on the subscript operand. For example, if i
is an int and a is an array then i[a] is legitimate but unusual.
If this is your coding style, suppress this message.
Top |
| 410 |
size_t not what was expected from fzl and/or fzu, using 'Type'
-- This warning is issued if you had previously attempted to set
the type of sizeof by use of the options +fzl, -fzl, or -fzu, and
a later size_t declaration contradicts the setting. This usually
means you are attempting to lint programs for another system
using header files for your own system. If this is the case we
suggest you create a directory housing header files for that
foreign system, alter size_t within that directory, and lint
using that directory.
Top |
| 411 |
ptrdiff_t not what was expected from fdl option, using 'Type' --
This warning is issued if you had previously attempted to set the
type of pointer differences by use of the fdl option and a later
ptrdiff_t declaration contradicts the setting. See suggestion in
Error Message 410.
Top |
| 412 |
Ambiguous format specifier '%X' -- The format specifier %X when
used with one of the scanf family, is ambiguous. With Microsoft
C it means %lx whereas in ANSI C it has the meaning of %x. This
ambiguous format specification has no place in any serious C
program and should be replaced by one of the above.
Top |
| 413 |
Likely use of null pointer 'Symbol' in [left/right] argument to
operator 'String' Reference -- From information gleaned from
earlier statements, it appears certain that a null pointer (a
pointer whose value is 0) has been used in a context where null
pointers are inappropriate. These include: Unary *, pointer
increment (++) or decrement(--), addition of pointer to numeric,
and subtraction of two pointers. In the case of binary
operators, one of the words 'left' or 'right' is used to
designate which operand is null. Symbol identifies the pointer
variable that may be null.
Top |
| 414 |
Possible division by 0 -- The second argument to either the
division operator (/) or the modulus operator (%) may be zero.
Information is taken from earlier statements including
assignments, initialization and tests.
Top |
| 415 |
access of out-of-bounds pointer ('Integer' beyond end of data) by
operator 'String' -- An out-of-bounds pointer was accessed.
String designates the operator. The parameter 'Integer' gives
some idea how far out of bounds the pointer may be. It is
measured in units given by the size of the pointed to object.
The value is relative to the last item of good data and therefore
should always be greater than zero. For example:
int a[10];
a[10] = 0;
results in an overflow message containing the phrase '1 beyond
end of data'.
Top |
| 416 |
creation of out-of-bounds pointer ('Integer' beyond end of data)
by operator 'String' -- An out-of-bounds pointer was created.
See message 415 for a description of the parameters Integer and
String. For example:
int a[10];
...
f( a + 11 );
Here, an illicit pointer value is created and is flagged as such
by PC-lint/FlexeLint. Note that the pointer a+10 is not
considered by PC-lint/FlexeLint to be the creation of an
out-of-bounds pointer. This is because ANSI C explicitly allows
pointing just beyond an array. Access through a+10, however, as
in *(a+10) or the more familiar a[10], would be considered
erroneous but in that case message 415 would be issued.
Top |
| 417 |
integral constant 'String' has precision Number which is longer
than long long int -- The longest possible integer is by default
8 bytes (see the +fll flag and then the -sll# option). An
integral constant was found to be even larger than such a
quantity. For example: 0xFFFF0000FFFF0000F. String is the token
in error.
Top |
| 418 |
Passing null pointer to function 'Symbol', Context Reference --
A NULL pointer is being passed to a function identified by
Symbol. The argument in question is given by Context. The
function is either a library function designed not to receive a
NULL pointer or a user function dubbed so via the option
-function.
Top |
| 419 |
Apparent data overrun for function 'Symbol', argument Integer
exceeds argument Integer -- This message is for data transfer
functions such as memcpy, strcpy, fgets, etc. when the size
indicated by the first cited argument (or arguments) exceeds the
size of the buffer area cited by the second. The message may
also be issued for user functions via the -function option.
Top |
| 420 |
Apparent access beyond array for function 'Symbol', argument
Integer exceeds Integer Reference -- This message is issued for
several library functions (such as fwrite, memcmp, etc.) wherein
there is an apparent attempt to access more data than exist. For
example, if the length of data specified in the fwrite call
exceeds the size of the data specified. The function is
specified by Symbol and the arguments are identified by argument
number.
Top |
| 421 |
Caution -- function 'Symbol' is considered dangerous -- This
message is issued (by default) for the built-in function gets.
This function is considered dangerous because there is no
mechanism to ensure that the buffer provided as first argument
will not overflow. A well known computer virus (technically a
worm) was created based on this defect. Through the -function
option, the user may designate other functions as dangerous.
Top |
| 422 |
Passing to function 'Symbol' a negative value (Integer), Context
Reference -- An integral value that appears to be negative is
being passed to a function that is expecting only positive values
for a particular argument. The message contains the name of the
function (Symbol), the questionable value (Integer) and the
argument number (Context). The function may be a standard
library function designed to accept only positive values such as
malloc or memcpy (third argument), or may have been identified by
the user as such through the -function or -sem options.
The negative integral value may in fact be unsigned. Thus:
void *malloc( unsigned );
void f()
{
int n = -1;
int *p;
p = malloc(n); // Warning 422
p = malloc( (unsigned) n ); // Warning 422
}
will result in the warnings indicated. Note that casting the
expression does not inhibit the warning.
There is a slight difference in behavior on 32-bit systems versus
16-bit systems. If long is the same size as int (as in 32-bit
systems) the warning is issued based upon the sign bit. If long
is larger than an int (as is true on typical 16-bit systems) the
warning is issued if the value was a converted negative as in the
examples above. It is not issued if an unsigned int has the
high-order bit set. This is because it is not unreasonable to
malloc more that 32,176 bytes in a 16-bit system.
Top |
| 423 |
Creation of memory leak in assignment to variable 'Symbol' -- An
assignment was made to a pointer variable (designated by Symbol)
which appeared to already be holding the address of an allocated
object which had not been freed. The allocation of memory which
is not freed is considered a memory leak.
Top |
| 424 |
Inappropriate deallocation (Name1) for 'Name2' data. -- This
message indicates that a deallocation (free(), delete, or
delete[]) as specified by String1 is inappropriate for the data
being freed. [12, Item 5]
The kind of data (specified by String2) is one or more of:
malloc, new, new[], static, auto, member, modified or constant.
These have the meanings as described below:
malloc data is data obtained from a call to malloc, calloc or
realloc.
new and new[] data is data derived from calls to new.
static data is either static data within a function or
external data.
auto data is non-static data in a function.
member data is a component of a structure (and hence can't be
independently freed).
modified data is the result of applying pointer arithmetic to
some other pointer. E.g.
p = malloc(100);
free( p+1 ); // warning
p+1 is considered modified.
constant data is the result of casting a constant to a pointer.
E.g.
int *p = (int *) Ox80002;
free(p); // warning
Top |
| 425 |
'Message' in processing semantic 'String' at token 'String' --
This warning is issued when a syntax error is encountered while
processing a Semantic option (-sem). The 'Message' depends upon
the error. The first 'String' represents the portion of the
semantic being processed. The second 'String' denotes the token
being scanned when the error is first noticed.
Top |
| 426 |
Call to function 'Symbol' violates semantic 'String' -- This
Warning message is issued when a user semantic (as defined by
-sem) is violated. 'String' is the subportion of the semantic
that was violated. For example:
//lint -sem( f, 1n > 10 && 2n > 10 )
void f( int, int );
...
f( 2, 20 );
results in the message:
Call to function 'f(int, int)' violates semantic '(1n>10)'
Top |
| 427 |
// comment terminates in \ -- A one-line comment terminates in
the back-slash escape sequence. This means that the next line
will be absorbed in the comment (by a standards-conforming
compiler -- not all compilers do the absorption, so beware). It
is much safer to end the line with something other than a
back-slash. Simply tacking on a period will do. If you really
intend the next line to be a comment, the line should be started
with its own double slash (//).
Top |
| 428 |
negative subscript (Integer) in operator 'String' -- A negative
integer was added to an array or to a pointer to an allocated
area (allocated by malloc, operator new, etc.) This message is
not given for pointers whose origin is unknown since a negative
subscript is, in general, legal.
The addition could have occurred as part of a subscript operation
or as part of a pointer arithmetic operation. The operator is
denoted by String. The value of the integer is given by Integer.
Top |
| 429 |
Custodial pointer 'Symbol' (Location) has not been freed or
returned -- A pointer of auto storage class was allocated
storage which was neither freed nor returned to the caller. This
represents a "memory leak". A pointer is considered custodial if
it uniquely points to the storage area. It is not considered
custodial if it has been copied. Thus:
int *p = new int[20]; // p is a custodial pointer
int *q = p; // p is no longer custodial
p = new int[20]; // p again becomes custodial
q = p + 0; // p remains custodial
Here p does not lose its custodial property by merely
participating in an arithmetic operation.
A pointer can lose its custodial property by passing the pointer
to a function. If the parameter of the function is typed pointer
to const or if the function is a library function, that
assumption is not made. For example
p = malloc(10);
strcpy (p, "hello");
Then p still has custody of storage allocated.
It is possible to indicate via semantic options that a function
will take custody of a pointer.
Top |
| 430 |
Character '@', taken to specify variable location, is not
standard C/C++ -- Many compilers for embedded systems have a
declaration syntax that specifies a location in place of an
initial value for a variable. For example:
int x @0x2000;
specifies that variable x is actually location 0x2000. This
message is a reminder that this syntax is non-standard (although
quite common). If you are using this syntax on purpose, suppress
this message.
Top |
| 431 |
Missing identifier for template parameter number Integer -- A
template object parameter (as opposed to a type parameter) was
not provided with an identifier. Was this an oversight?
Top |
| 432 |
Suspicious argument to malloc -- The following pattern was
detected:
malloc( strlen(e+1) )
where e is some expression. This is suspicious because it
closely resembles the commonly used pattern:
malloc( strlen(e)+1 )
If you really intended to use the first pattern then an
equivalent expression that will not raise this error is:
malloc( strlen(e)-1 )
Top |
| 433 |
Allocated area not large enough for pointer -- An allocation was
assigned to a pointer whose reach extends beyond the area that
was allocated. This would usually happen only with library
allocation routines such as malloc and calloc. For example:
int *p = malloc(1);
This message is also provided for user-declared allocation
functions. For example, if a user's own allocation function is
provided with the following semantic:
-sem(ouralloc,@P==malloc(1n))
We would report the same message. Please note that it is
necessary to designate that the returned area is freshly
allocated (ala malloc).
This message is always given in conjunction with the more general
Informational Message 826.
Top |
| 434 |
White space ignored between back-slash and new-line -- According
to the C and C++ standards, any back-slash followed immediately
by a new-line results in the deletion of both characters. For
example:
#define A \
34
defines A to be 34. If a blank or tab intervenes between the
back-slash and the new-line then according to a strict
interpretation of the standard you have defined A to be a
back-slash. But this blank is invisible to the naked eye and
hence could lead to confusion. Worse, some compilers silently
ignore the white-space and the program becomes non-portable.
You should never deliberately place a blank at the end of a line
and any such blanks should be removed. If you really need to
define a macro with a terminal back-slash you can use a comment
as in:
#define A \ /* commentary */
Top |
| 435 |
integral constant 'String' has precision Integer, use +fll to
enable long long" -- An integer constant was found that had a
precision that was too large for a long but would fit within a
long long. Yet the +fll flag that enables the long long type was
not set.
Check the sizes that you specified for long (-sl#) and for long
long (-sll#) and make sure they are correct. Turn on +fll if
your compiler supports long long. Otherwise use smaller
constants.
Top |
| 436 |
Apparent preprocessor directive in invocation of macro 'Symbol'
-- A function like macro was invoked whose arguments extended for
multiple lines which included preprocessor statements. This is
almost certainly an error brought about by a missing right
parenthesis.
By the rules of Standard C the preprocessing directive is
absorbed into the macro argument but then will not subsequently
get executed. For this reason some compilers treat the apparent
preprocessor directive as a directive. This is logical but not
portable. It is therefore best to avoid this construct.
Top |
| 437 |
Passing struct 'Symbol' to ellipsis -- A struct is being passed
to a function at a parameter position identified by an ellipsis.
For example:
void g()
{
struct A { int a; } x;
void f( int, ... );
f( 1, x );
...
}
This is sufficiently unusual that it is worth pointing out on the
likely hood that this is unintended. The situation becomes more
severe in the case of a Non-POD struct [10]. In this case the
behavior is considered undefined.
Top |
| 438 |
Last value assigned to variable 'Symbol' not used -- A value had
been assigned to a variable that was not subsequently used. The
message is issued either at a return statement or at the end of a
block when the variable goes out of scope. For example, consider
the following function:
void f( int n )
{
int x = 0, y = 1;
if( n > 0 )
{
int z;
z = x + y;
if( n > z ) { x = 3; return; }
z = 12;
}
}
Here we can report that x was assigned a value that had not been
used by the time the return statement had been encountered. We
also report that the most recently assigned value to z is unused
at the point that z goes out of scope. See message 838 in
Section 13.4 C Informational Messages and flags -fiw and -fiz in
Sections 2.3.6 Initialization-is-considered-a-Write flag (-fiw)
and 2.3.7 Initialization-by-Zero-is-considered-a-Write flag
(-fiz) .
This message is suppressed if the variable's address is assigned
to a pointer (or, equivalently, the variable is used to directly
initialize a reference to non-const).
Top |
| 440 |
for clause irregularity: variable 'Symbol' tested in 2nd
expression does not match 'Symbol' modified in 3rd -- A for
clause has a suspicious structure. The loop variable, as
determined by an examination of the 3rd for clause expression,
does not match the variable that is tested in the 2nd for clause
expression. For example:
for( i = 0; i < 10; j++ )
...
would draw this complaint since the 'i' of the 2nd expression
does not match the 'j' of the third expression.
Top |
| 441 |
for clause irregularity: loop variable 'Symbol' not found in 2nd
for expression -- The loop variable is determined by an
examination of the 3rd for clause expression. A loop variable
was found (and its name is given in the message) but it did not
appear as one of the accessed symbols of the condition expression
(the 2nd for expression). For example:
for( p = a; *p; j++ )
...
would draw this complaint since the 2nd expression does not
contain the 'j' of the third expression.
Top |
| 442 |
for clause irregularity: testing direction inconsistent with
increment direction -- A for clause was encountered that
appeared to have a parity problem. For example:
for( i = 0; i < 10; i-- )
...
Here the test for i less than 10 seems inconsistent with the 3rd
expression of the for clause which decreases the value of i.
This same message would be given if i were being increased by the
3rd expression and was being tested for being greater than some
value in the 2nd expression.
Top |
| 443 |
for clause irregularity: variable 'Symbol' initialized in 1st
expression does not match 'Symbol' modified in 3rd -- A for
clause has a suspicious structure. The loop variable, as
determined by an examination of the 3rd for clause expression,
does not match the variable that is initialized in the 1st
expression. For example:
for( ii = 0; i < 10; i++ )
...
would draw this complaint since the 'ii' of the 1st expression
does not match the 'i' of the third expression.
Top |
| 444 |
for clause irregularity: pointer 'Symbol' incremented in 3rd
expression is tested for NULL in 2nd expression -- The following
kind of situation has been detected:
for( ... ; p == NULL; p++ )
...
A loop variable being incremented or decremented would not
normally be checked to see if it is NULL. This is more likely a
programmer error.
Top |
| 445 |
reuse of for loop variable 'Symbol' at 'Location' could cause
chaos -- A for loop nested within another for loop employed the
same loop variable. For example:
for( i = 0; i < 100; i++ )
{
...
for( i = 0; i < n; i++ ) { ... }
}
Top |
| 446 |
for loop index variable 'Symbol' modified in body of the for loop
-- A for loop with an identifiable loop index variable was
programmed in such a way that the loop body also modifies the
index variable. For example:
for( i = 0; i < 100; i++ )
{
a[i++] = 0;
}
In general it is better to restrict modifications to for loop
index variables to the for clause if at all possible. If this is
not possible, you can prefix the for loop with an appropriate
lint comment such as:
/*lint -e{446} i is modified in the body of the for loop */
Top |
| 447 |
Extraneous whitespace ignored in include directive for file
'FileName'; opening file 'FileName' -- A named file was found to
contain either leading or trailing whitespace in the #include
directive. While legal, the ISO Standards allow compilers to
define how files are specified or the header is identified,
including the appearance of whitespace characters immediately
after the < or opening " or before the > or closing ". Since
filenames tend not to contain leading or trailing whitespace,
Lint ignores the (apparently) extraneous characters and processes
the directive as though the characters were never given. The use
of a -efile option on either String for this message will cause
Lint to process #include's with whitespace intact.
Top |
| 448 |
Likely access of pointer pointing Integer bytes past nul
character by operator 'String' -- Accessing past the terminating
nul character is often an indication of a programmer error. For
example:
char buf[20];
strcpy( buf, "a" );
char c = buf[4]; // legal but suspect.
Although buf has 20 characters, after the strcpy, there would be
only two that the programmer would normally be interested in.
Top |
| 449 |
Pointer variable 'Symbol' previously deallocated -- A pointer
variable (designated in the message) was freed or deleted in an
earlier statement.
Top |
| 451 |
Header file 'FileName' repeatedly included but does not have a
standard include guard -- The file named in the message has
already been included in the current module. Moreover it has
been determined that this header does not have a standard include
guard. A standard include guard has the form
#ifndef Name
#define Name
...
#endif
with nothing but comments before and after this sequence and
nothing but comments between the #ifndef and the #define Name.
This warning may also be accompanied by a 537 (repeated include
header). Message 537 is often suppressed because if you are
working with include guards, it is not a helpful message.
However, the message 451 should be left on in order to check the
consistency of the include guards themselves.
See also Elective Note 967 in Section 13.5 C Elective Notes.
Top |
| 452 |
typedef Symbol 'Symbol' redeclared (TypeDiff) conflicts with
Location", -- A typedef symbol is being declared to be a
different type. This can be legal, especially with multiple
modules, but is not good programming practice. It inteferes with
program legibility.
Top |
| 453 |
Function 'Symbol', previously designated pure, String 'Name' --
A semantic option designated that the named function, Symbol, is
pure (lacking non-local side-effects; see the pure semantic in
Section 4. Semantics ). However, an impurity was detected. Such
impurities include calling a function through a function pointer,
accessing a volatile variable, modifying a static variable or
calling a function whose purity PC-lint/FlexeLint cannot verify.
String describes which of these reasons apply and Name shows the
related variable or function, as appropriate.
Despite the inconsistency reported, the function will continue to
be regarded as pure.
Top |
| 454 |
A thread mutex has been locked but not unlocked -- A return
point in a function has been reached such that a mutex lock that
had been previously set has not been unlocked. E.g.,
//lint -sem( lock, thread_lock )
void f( int x )
{
lock();
if( x < 0 ) return; // Warning 454
...
Top |
| 455 |
A thread mutex that had not been locked is being unlocked -- A
call to an unlock() function was made that was not preceded by a
balancing lock(). It is assumed that every mutex lock() function
must be balanced by exactly one unlock() function, no more, no
less. For example:
//lint -sem( lock, thread_lock )
//lint -sem( unlock, thread_unlock )
void f( bool x )
{
lock();
/* something */;
unlock();
/* something else */
unlock(); // Warning 455
}
Top |
| 456 |
Two execution paths are being combined with different mutex lock
states -- It is the purpose of this message to make absolutely
certain that every lock has a corresponding unlock in the same
unbroken sequence of code in the same function.
Execution paths can be combined at the end of an if statement,
switch statement, or the begining of while, for and do
statements, a label (target of goto), etc. In all these cases we
check to make sure that the mutex lock states are the same. For
example:
//lint -sem( lock, thread_lock )
void f( bool x )
{
if( x ) lock();
// Warning 456 issued here
...
It could be argued that if an unlock() call would appear under
control of the very same bool x in the example above then all
would be well. And if this is your coding style you are free to
turn this message off. But errors in mutex locking have such
horrible programming consequences as to suggest especially strong
measures to assure code correctness. We recommend, for example:
//lint -sem( lock, thread_lock )
//lint -sem( unlock, thread_unlock )
void f( bool x )
{
if( x )
{ lock(); /* something */; unlock(); }
else
{ /* something */ }
}
If the 'something' that is being executed is sufficently complex,
then it can be made into a function.
Top |
| 457 |
Function 'Symbol1' of thread 'Symbol2' has an unprotected write
access to variable 'Symbol3' which is used by function 'Symbol4'
of thread 'Symbol5' -- A variable (Symbol3) was modified by
function (Symbol1) of thread (Symbol2) outside of any recognized
mutex lock. It was also accessed by a function (Symbol3) of a
second thread (Symbol5). The latter access may or may not have
been protected. If unprotected, a second message will be issued
with the roles of Symbol1 and Symbol4 interchanged.
Top |
| 458 |
Function 'Symbol1' of thread 'Symbol2' has an unprotected read
access to variable 'Symbol3' which is modified by function
'Symbol4' of thread 'Symbol5' -- A variable identified in the
message was accessed (non-modifiing) by a function (Symbol1) of
thread (Symbol2) outside of any recognized mutex lock. It was
also modified by a function (Symbol4) in a second thread
(Symbol5). The modification may or may not have been protected.
If unprotected, Warning 457 will also be issued.
Top |
| 459 |
Function 'Symbol' whose address was taken has an unprotected
access to variable 'Symbol' -- This message is activated only
when it appears that the program has more than one thread. See
Section 8. Multi-thread Suppport to determine what those
conditions might be.
If a function's address is taken, we presume that we are unable
to determine statically all the locations from which the function
may be called and so we presume that any and all threads can call
this function and so the function needs to have protected access
to every static variable that it might touch.
There are several remedies to such a message. If multiple
threads can indeed access this function, then place a mutex lock
in the function. If there already is a mutex lock and we don't
recognize it, then set the thread_protected semantic for the
function. If only one thread really accesses this function or if
the access is guaranteed to be benign, then, after making sure
this condition is commented in the code, use the same
thread_protected semantic for the function.
Top |
| 460 |
Thread 'Symbol' has unprotected call to thread unsafe function
'Symbol' which is also called by thread 'Symbol' -- The second
symbol in the message represents a function that was designated
as being thread_unsafe through the -sem option. It was being
called in an unprotected region of a thread whose root function
is the first symbol in the message. Another thread is also
accessing this function and this thread is identified by the
third parameter of the message.
Calls to thread unsafe functions need to be protected by mutex
locks if they are to be employed by more than one thread.
Top |
| 461 |
Thread 'Symbol' has unprotected call to function 'Symbol' of
group 'Name' while thread 'Symbol' calls function 'Symbol' of the
same group -- This message is similar to Warning 460 in that a
thread (identified in the message as the first Symbol) is making
a call on a function (the second Symbol) which had been deduced
(through options) as being thread unsafe. Like message 460 there
is another thread that is also doing some calling. In this case
the other thread is not calling the same function as the first
but one which has been placed within the same group (identified
by the third parameter) as the first function. See Section 8.
Multi-thread Support to obtain further information on thread
unsafe function groups and options to determine them.
Top |
| 462 |
Thread 'Symbol' calling function 'Symbol' is inconsistent with
the 'String' semantic -- The first Symbol in the message
identifies a thread. The second Symbol identifies a function
called directly or indirectly by the thread. The String argument
specifies a semantic that had been attributed to the functon. It
should have one of the following forms:
thread_not
thread_not( list )
thread_only( list )
If the second form is given, it means that the thread appears on
the list. If the 3rd form is given it means that the thread was
not on the list.
Top |
| 464 |
Buffer argument will be copied into itself -- This is issued
when we encounter a function argument expression used in such a
way that there will be an attempt to copy its contents onto
itself. E.g.
sprintf( s, "%s", s );
Top |
| 501 |
Expected signed type -- The unary minus ope |
