This issue summary has been automatically converted from the original issue lists and some formatting may not have been preserved.
| Issue | Summary | Status |
|---|---|---|
| 0001 | Do functions return values by copying? | Fixed in C90 TC1 |
| 0002 | Should \ be escaped within macro actual parameters? |
Closed |
| 0003.01 | Are preprocessing numbers too inclusive? | Closed |
| 0003.02 | Should white space surround macro substitutions? | Closed |
| 0003.03 | Is an empty macro argument a constraint violation? | Closed |
| 0003.04 | Should preprocessing directives be permitted within macro invokations? | Closed |
| 0004 | Are multiple definitions of unused identifiers with external linkage permitted? | Fixed in C90 |
| 0005 | May a conforming implementation define and recognize a pragma which would change the semantics of the language? | Closed |
| 0006 | How does strtoul behave when presented with a subject sequence that begins with a minus sign? |
Closed |
| 0007 | Are declarations of the form struct tag permitted after tag has already been declared? |
Closed |
| 0008.01 | Is dead-store elimination permitted near setjmp? |
Closed |
| 0008.02 | Should volatile functions be added? | Closed |
| 0009 | Are typedef names sometimes ambiguous in parameter declarations? | Fixed in C90 TC1 |
| 0010 | Is the typedef to an incomplete type valid? | Closed |
| 0011.01 | When do the types of multiple external declarations get formed into a composite type? | Fixed in C90 TC1 |
| 0011.02 | Does extern link to a static declaration that is not visible? |
Fixed in C90 TC1 |
| 0011.03 | Are implicit initializers for tentative array definitions syntactically valid? | Closed |
| 0011.04 | Does an incomplete array get completed as a tentative definition? | Fixed in C90 TC1 |
| 0012 | Can one take the address of a void expression? | Closed |
| 0013.01 | How does one form the composite type of mixed array and pointer parameter types? | Fixed in C90 TC1 |
| 0013.02 | Is compatible properly defined for recursive types? | Closed |
| 0013.03 | What is the composite type of an enumeration and an integer? | Closed |
| 0013.04 | When is a struct type complete? | Fixed in C90 TC1 |
| 0013.05 | When is the sizeof an enumeration type known? |
Fixed in C90 TC1 |
| 0014.01 | Is setjmp a macro or a function? |
Closed |
| 0014.02 | How does fscanf("%n") behave on end-of-file? |
Fixed in C90 TC1 |
| 0015 | How does an unsigned plain bitfield promote? | Closed |
| 0016.01 | Can a tentative definition have an incomplete type initially? | Closed |
| 0016.02 | Can you implicitly initialize a union when null pointers have nonzero bit patterns? | Fixed in C90 TC1 |
| 0017.01 | Are newlines permitted within macro invocations in preprocessing directives? | Fixed in C90 TC1 |
| 0017.02 | Should the absence of function main be explicitly undefined? |
Fixed in C90 TC1 |
| 0017.03 | Does a constraint violation win over undefined behavior? | Fixed in C90 TC1 |
| 0017.04 | Do numeric escape sequences map from source to execution character sets? | Closed |
| 0017.05 | When are character constants implementation defined? | Closed |
| 0017.06 | Are register aggregates permitted? | Fixed in C90 TC1 |
| 0017.07 | What is the scope and uniqueness of size_t? |
Closed |
| 0017.08 | What types are compatible with pointer to void? |
Closed |
| 0017.09 | What is the type of an assignment expression? | Fixed in C90 TC1 |
| 0017.10 | When is the sizeof an object needed? |
Closed |
| 0017.11 | Is struct t; struct t; valid? |
Closed |
| 0017.12 | How do typedefs parse in function prototypes? | Fixed in C90 TC1 |
| 0017.13 | How does register affect compatibility of function parameters? |
Closed |
| 0017.14 | const void type as a parameter |
Fixed in C90 TC1 |
| 0017.15 | When do array parameters get converted to pointers? | Fixed in C90 TC1 |
| 0017.16 | Are subarrays of arrays distinct objects? | Fixed in C90 TC1 |
| 0017.17 | How do you initialize the first member of a union if it has no name? | Fixed in C90 TC1 |
| 0017.18 | Are f() and f(void) compatible? |
Closed |
| 0017.19 | Are macro expansions ambiguous? | Fixed in C90 TC1 |
| 0017.20 | Is the scope of macro parameters defined in the right place? | Closed |
| 0017.21 | Is translation phase 4 defined unambiguously? | Closed |
| 0017.22 | Does the rescan of a macro invocation also perform token pasting? | Fixed in C90 TC1 |
| 0017.23 | How long does blue paint persist on macro names? |
Closed |
| 0017.24 | Can subclause 7.1.2 be better expressed? | Fixed in C90 TC1 |
| 0017.25 | Should must appear in footnotes? | Closed |
| 0017.26 | Are unnamed union members required to be initialized? | Fixed in C90 TC1 |
| 0017.27 | Does the # flag alter zero stripping of %g in fprintf? |
Closed |
| 0017.28 | Does errno get stored before library functions return? |
Closed |
| 0017.29 | When does conversion failure occur in floating-point fscanf input? |
Fixed in C90 TC1 |
| 0017.30 | Do fseek/fsetpos require values from successful calls to ftell/fgetpos? |
Fixed in C90 TC1 |
| 0017.31 | Are object sizes always in bytes? | Closed |
| 0017.32 | Are strcmp/strncmp defined when char is signed? |
Closed |
| 0017.33 | Are strcmp/strncmp defined for strings of differing length |
Closed |
| 0017.34 | Is strtok described properly? |
Closed |
| 0017.35 | When is a physical source line created? | Closed |
| 0017.36 | Is a function returning const void defined? |
Closed |
| 0017.37 | What is the type of a function call? | Fixed in C90 TC1 |
| 0017.38 | What is an iteration control structure or selection control structure? | Fixed in C90 TC1 |
| 0017.39 | Are header names tokens outside include directives? | Fixed in C90 TC1 |
| 0018 | Does fscanf recognize literal multibyte characters properly? |
Closed |
| 0019 | Are printing characters implementation defined? | Closed |
| 0020 | Is the relaxed Ref/Def linkage model conforming? | Closed |
| 0021 | What is the result of printf("%#.4o", 345)? |
Fixed in C90 TC1 |
| 0022 | What is the result of strtod("100ergs", &ptr)? |
Fixed in C90 TC1 |
| 0023 | If 99,999 is larger than DBL_MAX_10_EXP, what is the result of strtod("0.0e99999", &ptr)? |
Closed |
| 0024 | For strtod, what does "C" locale mean? |
Closed |
| 0025 | What is meant by representable floating-point value? | Closed |
| 0026 | Can one use other than the basic C character set in a strictly conforming program? | Closed |
| 0027 | May a standard conforming implementation add identifier characters? | Fixed in C90 TC1 |
| 0028 | What are the aliasing rules for dynamically allocated objects? | Closed |
| 0029 | Must compatible structs/unions have the same tag in different translation units? | Closed |
| 0030 | May sin(DBL_MAX) set errno to EDOM? |
Closed |
| 0031 | How are exceptions handled in constant expressions? | Closed |
| 0032 | Can an implementation permit a comma operator in a constant expression? | Closed |
| 0033 | Must a conforming implementation diagnose shall violations outside Constraints? | Closed |
| 0034.01 | Does size information evaporate when a declaration goes out of scope, even for objects with external linkage? | Fixed in C90 TC1 |
| 0034.02 | If so, can one then write conflicting declarations in disjoint scopes? | Closed |
| 0035.01 | Can one declare an enumeration or struct tag as part of an old-style parameter declaration? | Closed |
| 0035.02 | If so, what is the scope of enumeration tags and constants declared in old-style parameter declarations? | Closed |
| 0036 | May a floating-point constant be represented with more precision than implied by its type? | Closed |
| 0037 | Can UNICODE or ISO 10646 be used as a multibyte code? | Closed |
| 0038 | What happens when macro replacement creates adjacent tokens that can be taken as a single token? | Closed |
| 0039.01 | Must MB_CUR_MAX be one in the "C" locale? |
Closed |
| 0039.02 | Should setlocale(LC_ALL, NULL) return "C" in the "C" locale? |
Closed |
| 0040.01 | What is the composite type of f(int) and f(const int)? |
Fixed in C90 TC1 |
| 0040.02 | Is an implementation that fails to equal the value of an environmental limit conforming? | Fixed in C90 TC1 |
| 0040.03 | Is an Environmental Constraint a constraint? | Closed |
| 0040.04 | Should the response to Defect Report #017, Q39 be reconsidered? | Closed |
| 0040.05 | Can a conforming implementation accept long long? |
Closed |
| 0040.06 | Can one use offsetof(struct t1, mbr) before struct t1 is completely defined? |
Closed |
| 0040.07 | Can sizeof be applied to earlier parameter names in a prototype, or to earlier fields in a struct? |
Closed |
| 0040.08 | What arithmetic can be performed on a char holding a defined character literal value? |
Closed |
| 0040.09 | Should the response to Defect Report #017, Q27 be reconsidered? | Closed |
| 0041 | Are 'A' through 'Z' always isupper in all locales? |
Closed |
| 0042.01 | Does memcpy define a (sub)object? |
Closed |
| 0042.02 | If so, how big is the object defined by memcpy? |
Closed |
| 0042.03 | How big is a string object defined by the str* functions? |
Closed |
| 0043.01 | Can NULL be defined as 4-4? |
Fixed in C90 TC1 |
| 0043.02 | Can an identifier that starts with an underscore be defined as a macro in a source file that includes at least one standard header? | Closed |
| 0044.01 | What does it mean to say that the type of offsetof is size_t? |
Closed |
| 0044.02 | Must the expansion of a standard header be a strictly conforming program? | Closed |
| 0044.03 | Does expanding offsetof result in a non-strictly conforming program? |
Closed |
| 0044.04 | Can one use offsetof in a strictly conforming program? |
Closed |
| 0044.05 | Is offsetof the only standard macro that renders a program not strictly conforming? |
Closed |
| 0045 | Can one freopen an already closed file? |
Closed |
| 0046 | May a typedef be redeclared as a parameter outside an old-style function parameter list? | Closed |
| 0047 | Can an array parameter have elements of incomplete type? | Closed |
| 0048 | Is abort compatible with POSIX? |
Closed |
| 0049 | Can strxfrm produce a longer translation string? |
Closed |
| 0050 | Does a proper definition of wchar_t need to be in scope to write a wide-character literal? |
Closed |
| 0051 | Can one index beyond the declared end of an array if space is allocated for the extra elements? | Closed |
| 0052.01 | Should the mktime example use (time_t)-1 instead of -1? |
Fixed in C90 TC1 |
| 0052.02 | Is the index entry for static correct? | Fixed in C90 TC1 |
| 0052.03 | Does the C Standard come with a Rationale, as indicated in Footnote 1? | Closed |
| 0053 | Do the aliasing rules cover accesses to different function pointers properly? | Fixed in C90 TC1 |
| 0054 | What is the behavior of various string functions with a specified length of zero? | Fixed in C90 TC1 |
| 0055 | Must the SIG* macros have distinct values? |
Fixed in C90 TC1 |
| 0056 | How accurate must floating-point arithmetic be? | Closed |
| 0057 | Must there exist a user-accessible integral type for every pointer? | Closed |
| 0058 | What is the number of digits in a number that can be processed by the scanf family and the strtod family? |
Closed |
| 0059 | Must an incomplete type be completed by the end of a translation unit? | Closed |
| 0060 | When an array of char (or wchar_t) is initialized with a string literal that contains fewer characters than the array, are the remaining elements of the array initialized? |
Fixed in C90 TC2 |
| 0061 | Interpretation of white space in the format string of a scan statement | Closed |
| 0062 | Can the rename function alway return a failure? |
Closed |
| 0063 | This is Defect Report 056 | Closed |
| 0064 | What is a null pointer constant? | Closed |
| 0065 | Can strictly conforming programs contain locales other that the 'C' locale? | Fixed in C90 TC2 |
| 0066 | A set of locale questions | Closed |
| 0067 | Are the definitions of types clear? | Closed |
| 0068 | When are values of the type char treated as signedor nonnegative integers |
Closed |
| 0069 | What is the meaning of pure binary numeration system? | Closed |
| 0070 | Can non-compatible types be used interchangeabily for function arguments? | Closed |
| 0071 | Are all enumerated types compatible with a single type? | Fixed in C90 TC2 |
| 0072 | What is the definition of an object? | Closed |
| 0073 | Another definition of an object question | Closed |
| 0074 | Can the alignment of an object that is a member of a structure be different from the alignment of an object of the same type that is not a member of a structure? | Closed |
| 0075 | What is the alignment of allocated memory? | Closed |
| 0076 | A set of pointers to the end of arrays questions | Closed |
| 0077 | Is the address of an object constant throughout its lifetime? | Closed |
| 0078 | May optimizer invoke the as-if rule to rearrange code? | Closed |
| 0079 | Is the address of a standard library function the same in different translation units? | Closed |
| 0080 | Questions on merging of string constants | Fixed in C90 TC2 |
| 0081 | What is the result of the left shift operator E1 < E2, when E1 is signed? |
Closed |
| 0082 | Many varargs questions | Fixed in C90 TC2 |
| 0083 | A use of library functions question | Fixed in C90 TC2 |
| 0084 | When is an incomplete type in function declaration a parameter? | Closed |
| 0085 | Is the return from main equivalent to calling exit? |
Fixed in C90 TC2 |
| 0086 | At object-like macros in system headers conforming? | Closed |
| 0087 | Is the order of evaluation when there are no sequence points well defined? | Closed |
| 0088 | Are two incomplete structure types with a (lexically) identical tag always compatible? | Closed |
| 0089 | When does multiple definitions of a macro require a diagnositc message? | Fixed in C90 TC2 |
| 0090 | Multibyte characters in formats question | Closed |
| 0091 | Does a locale with multibye characters conform? | Closed |
| 0092 | Are the remaining elements in a partially initalized string guaranteed to be zero? | Closed |
| 0093 | Can a conforming freestanding implementation reserve identifiers? | Fixed in C90 TC2 |
| 0094 | Is there an inconsistency between the constraints on passing values versus returning values? | Closed |
| 0095 | Are the initialization constraints clear? | Closed |
| 0096 | Can the element type in an array declarator be a non-object type? | Closed |
| 0097 | Can the type argument of the offsetof macro be an incomplete type? |
Closed |
| 0098 | Do function types and incomplete type have size? | Closed |
| 0099 | What does the term assignment operator mean? | Closed |
| 0100 | Do functions return values by copying? | Fixed in C90 TC1 |
| 0101 | Are mismatched qualifiers allowed? | Fixed in C90 TC2 |
| 0102 | Does a constraint violation win over undefined behavior? | Closed |
| 0103 | Is a diagnostic required when formal parameters for functions are incomplete types? | Closed |
| 0104 | When is an incomplete type in function declaration a parameter? | Closed |
| 0105 | Does a constraint violation win over undefined behavior? | Fixed in C90 TC1 |
| 0106 | Can one take the address of a void expression? | Closed |
| 0107 | Several assert questions |
Closed |
| 0108 | Is it conforming to allow macros to make keywords? | Closed |
| 0109 | Does the C Standard draw any significant distinction between undefined values and undefined behavior? | Closed |
| 0110 | When is a formal parameter having array-of-non-object type not conforming? | Closed |
| 0111 | A question on conversion of pointer-to-qualified type values to type (void*) values |
Closed |
| 0112 | A Null pointer constants and relational comparison question | Closed |
| 0113 | Return expressions in functions declared to return qualified void questions |
Closed |
| 0114 | Initialization of multi-dimensional char array object questions |
Closed |
| 0115 | What it means to declare a declarator? | Closed |
| 0116 | Is a diagnostic required when the address of a reigister arry is implicitly taken? |
Closed |
| 0117 | Abstract semantics, sequence points, and expression evaluation question | Closed |
| 0118 | When is the sizeof an enumeration type known? |
Fixed in C90 TC2 |
| 0119 | Is a diagnostic required on an example of an initialization of multi-dimensional array objects | Closed |
| 0120 | Semantics of assignment to (and initialization of) bit-fields question | Closed |
| 0121 | What is ment by size required when convering a ponter value to an integral type? | Closed |
| 0122 | Is the type of a bit-field totally independent from its width? | Closed |
| 0123 | “Type categories” and qualified types question | Closed |
| 0124 | What is the difference between casts to a void type versus casts to the void type? |
Fixed in C90 TC2 |
| 0125 | When are declarations useing extern (qualified) void not conforming? |
Closed |
| 0126 | What does synonym mean with respect to typedef names? | Closed |
| 0127 | What is the composite type of an enumeration and an integer? | Closed |
| 0128 | Editorial issue relating to tag declarations in type specifiers | Closed |
| 0129 | When is name spaces of tags are shared? | Closed |
| 0130 | When is data read from a text stream guaranteed to match what was written to the stream? | Closed |
| 0131 | What is the meaning of const-qualification? | Fixed in C90 TC2 |
| 0132 | Can undefined behavior occur at translation time, or only at run time? | Closed |
| 0133 | Undefined behavior not previously listed in subclause G2 | Closed |
| 0134 | Is error number an undefined term? | Closed |
| 0135 | Is the SVR4 fwrite different? |
Closed |
| 0136 | Does mktime yield a -1 in the spring-forward gap when tm_isdst is -1? |
Closed |
| 0137 | Is printf("%.1f", -0.01) required to produce 0.0 , -0.0, or are both acceptable? |
Closed |
| 0138 | What are the storage durations? | Fixed in C90 TC2 |
| 0139 | Is an incomplete type compatible with the completed type? | Fixed in C90 TC2 |
| 0140 | What does performed and other operation mean? | Closed |
| 0141 | What does EOF mean in <stdio.h>? |
Closed |
| 0142 | Is it permitted to #undef a reserved macro name? |
Fixed in C99 |
| 0143 | What are the definitions of file opening modes? | Fixed in C99 |
| 0144 | Can the white space preceeding the initial # of a preprocessing directive be derived from macro expansion? |
Fixed in C99 |
| 0145 | The four possible forms for a constant expression are not consistent | Fixed in C99 |
| 0146 | Does the constraint of 6.1.2 serve a purpose? | Fixed in C99 |
| 0147 | Is there a requirement for a sequence point to occur within a library function? | Fixed in C99 |
| 0148 | Is it clear when it is permitted to declare a library function? | Closed |
| 0149 | Is the term variable defiend? | Fixed in C99 |
| 0150 | Are programs containing char array[] = "Hello, World"; strictly conforming? |
Fixed in C99 |
| 0151 | Is the out from printf("%#.0o", 0); ambiguous? |
Closed |
| 0152 | Can longjmp be used to return from a signal handler invoked other than through abort or raise? |
Closed |
| 0153 | Is there a problem with empty arguments in macro calls? | Closed |
| 0154 | What restrictions apply to implementation-defined entities? | Closed |
| 0155 | Is the word unique in subclause 7.10.3 ambiguous? | Fixed in C99 |
| 0156 | Should calls to fsetpos with positions in closed and reopened streams be undefined? |
Fixed in C99 |
| 0157 | Is it clearly indicated when the spelling of a type name is or is not significant? | Fixed in C99 |
| 0158 | Are the semantics for the explicit conversion of null pointer constants defined? | Fixed in C99 |
| 0159 | Is the introduction to the C Standard confusing? | Fixed in C99 |
| 0160 | It is unclear what applications can and cannot do with identifiers that are reserved? | Fixed in C99 |
| 0161 | Is the wording of subclause 7.13 unclear? | Closed |
| 0162 | Is the description of the static objects used by time.h functions misleading? |
Fixed in C99 |
| 0163 | Is it clear whether the use of an undeclared identifier as a primary expression requires a diagnostic message to be issued? | Closed |
| 0164 | Is there a constraint to prevent declarations involving types not defined by subclause 6.1.2.5? | Closed |
| 0165 | Is the wording of subclause 6.5.2.3 concerning tags defective? | Fixed in C99 |
| 0166 | Do constraints that require something to be an lvalue place an unacceptable burden on the implementation? | Fixed in C99 |
| 0167 | The n conversion specifier in subclause 7.9.6.2 made by TC1, Defect Report #014, Question 2, should be applied to subclause 7.9.6.1 |
Fixed in C99 |
| 0168 | The change to subclause 6.3 made by TC1, Defect Report #053, Question 1, should also be applied in Annex .2 (page 200) | Fixed in C99 |
| 0169 | Is the description of the replacement of trigraphs contradictory? | Closed |
| 0170 | Are the description of operators and punctuators is confusing, and are the constraints contradictory? | Fixed in C99 |
| 0171 | Is it possible to create implementations with unreasonable arrangements of integral types? | Fixed in C99 |
| 0172 | Does the description for the relational and equality operators contain defects? | Fixed in C99 |
| 0173 | What is the meaning of line number when a token is split over more than one physical source line? | Closed |
| 0174 | Is there a number of errors in the usual arithmetic conversions section? | Fixed in C99 |
| 0175 | Is the sscanf example added by TC1 wrong? |
Fixed in C99 |
| 0176 | Are rules concerning whether #error generates a diagnostic contradictory? |
Closed |
| 0177 | A Preprocessing directives question | Fixed in C99 |
| 0178 | Why does Defect Report #051 and Defect Report #073 answer the same question differently? | Closed |