This code abort()s when compiled as c++ source: -g.cpp--------------------------------- #include <stdlib.h> struct gtst { unsigned char data[2]; }; static struct gtst s; int main(int argc, char *argv[]) { unsigned char * pc; struct gtst * ps; ps = &s; pc = (ps->data[0]='A', ps->data); if (&s.data[0] != pc) abort(); return 0; } ---------------------------------- Commandline: gcc -o g g.cpp Optimization doesn't matter Tried with gcc V3.3.1 (Release) and gcc-Version 3.3.2 20030901 (prerelease) If the source is named g.c and compiled with commandline "gcc -o g g.c" all is fine. gcc version 2.95.3 20010315 (SuSE) works fine. -g.ii--------------------------------- # 1 "g.cpp" # 1 "<built-in>" # 1 "<command line>" # 1 "g.cpp" # 1 "/usr/include/stdlib.h" 1 3 4 # 25 "/usr/include/stdlib.h" 3 4 # 1 "/usr/include/features.h" 1 3 4 # 283 "/usr/include/features.h" 3 4 # 1 "/usr/include/sys/cdefs.h" 1 3 4 # 284 "/usr/include/features.h" 2 3 4 # 312 "/usr/include/features.h" 3 4 # 1 "/usr/include/gnu/stubs.h" 1 3 4 # 313 "/usr/include/features.h" 2 3 4 # 26 "/usr/include/stdlib.h" 2 3 4 # 1 "/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3.2/include/stddef.h" 1 3 4 # 213 "/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3.2/include/stddef.h" 3 4 typedef unsigned int size_t; # 34 "/usr/include/stdlib.h" 2 3 4 extern "C" { # 1 "/usr/include/bits/waitflags.h" 1 3 4 # 43 "/usr/include/stdlib.h" 2 3 4 # 1 "/usr/include/bits/waitstatus.h" 1 3 4 # 63 "/usr/include/bits/waitstatus.h" 3 4 # 1 "/usr/include/endian.h" 1 3 4 # 37 "/usr/include/endian.h" 3 4 # 1 "/usr/include/bits/endian.h" 1 3 4 # 38 "/usr/include/endian.h" 2 3 4 # 64 "/usr/include/bits/waitstatus.h" 2 3 4 union wait { int w_status; struct { unsigned int __w_termsig:7; unsigned int __w_coredump:1; unsigned int __w_retcode:8; unsigned int:16; } __wait_terminated; struct { unsigned int __w_stopval:8; unsigned int __w_stopsig:8; unsigned int:16; } __wait_stopped; }; # 44 "/usr/include/stdlib.h" 2 3 4 # 94 "/usr/include/stdlib.h" 3 4 typedef struct { int quot; int rem; } div_t; typedef struct { long int quot; long int rem; } ldiv_t; __extension__ typedef struct { long long int quot; long long int rem; } lldiv_t; # 133 "/usr/include/stdlib.h" 3 4 extern size_t __ctype_get_mb_cur_max (void) throw (); extern double atof (__const char *__nptr) throw () __attribute__ ((__pure__)); extern int atoi (__const char *__nptr) throw () __attribute__ ((__pure__)); extern long int atol (__const char *__nptr) throw () __attribute__ ((__pure__)); __extension__ extern long long int atoll (__const char *__nptr) throw () __attribute__ ((__pure__)); extern double strtod (__const char *__restrict __nptr, char **__restrict __endptr) throw (); extern float strtof (__const char *__restrict __nptr, char **__restrict __endptr) throw (); extern long double strtold (__const char *__restrict __nptr, char **__restrict __endptr) throw (); extern long int strtol (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw (); extern unsigned long int strtoul (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw (); __extension__ extern long long int strtoq (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw (); __extension__ extern unsigned long long int strtouq (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw (); __extension__ extern long long int strtoll (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw (); __extension__ extern unsigned long long int strtoull (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw (); # 211 "/usr/include/stdlib.h" 3 4 # 1 "/usr/include/xlocale.h" 1 3 4 # 28 "/usr/include/xlocale.h" 3 4 typedef struct __locale_struct { struct locale_data *__locales[13]; const unsigned short int *__ctype_b; const int *__ctype_tolower; const int *__ctype_toupper; } *__locale_t; # 212 "/usr/include/stdlib.h" 2 3 4 extern long int __strtol_l (__const char *__restrict __nptr, char **__restrict __endptr, int __base, __locale_t __loc) throw (); extern unsigned long int __strtoul_l (__const char *__restrict __nptr, char **__restrict __endptr, int __base, __locale_t __loc) throw (); __extension__ extern long long int __strtoll_l (__const char *__restrict __nptr, char **__restrict __endptr, int __base, __locale_t __loc) throw (); __extension__ extern unsigned long long int __strtoull_l (__const char *__restrict __nptr, char **__restrict __endptr, int __base, __locale_t __loc) throw (); extern double __strtod_l (__const char *__restrict __nptr, char **__restrict __endptr, __locale_t __loc) throw (); extern float __strtof_l (__const char *__restrict __nptr, char **__restrict __endptr, __locale_t __loc) throw (); extern long double __strtold_l (__const char *__restrict __nptr, char **__restrict __endptr, __locale_t __loc) throw (); extern double __strtod_internal (__const char *__restrict __nptr, char **__restrict __endptr, int __group) throw (); extern float __strtof_internal (__const char *__restrict __nptr, char **__restrict __endptr, int __group) throw (); extern long double __strtold_internal (__const char *__restrict __nptr, char **__restrict __endptr, int __group) throw (); extern long int __strtol_internal (__const char *__restrict __nptr, char **__restrict __endptr, int __base, int __group) throw (); extern unsigned long int __strtoul_internal (__const char *__restrict __nptr, char **__restrict __endptr, int __base, int __group) throw (); __extension__ extern long long int __strtoll_internal (__const char *__restrict __nptr, char **__restrict __endptr, int __base, int __group) throw (); __extension__ extern unsigned long long int __strtoull_internal (__const char * __restrict __nptr, char **__restrict __endptr, int __base, int __group) throw (); extern __inline double strtod (__const char *__restrict __nptr, char **__restrict __endptr) throw () { return __strtod_internal (__nptr, __endptr, 0); } extern __inline long int strtol (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw () { return __strtol_internal (__nptr, __endptr, __base, 0); } extern __inline unsigned long int strtoul (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw () { return __strtoul_internal (__nptr, __endptr, __base, 0); } extern __inline float strtof (__const char *__restrict __nptr, char **__restrict __endptr) throw () { return __strtof_internal (__nptr, __endptr, 0); } extern __inline long double strtold (__const char *__restrict __nptr, char **__restrict __endptr) throw () { return __strtold_internal (__nptr, __endptr, 0); } __extension__ extern __inline long long int strtoq (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw () { return __strtoll_internal (__nptr, __endptr, __base, 0); } __extension__ extern __inline unsigned long long int strtouq (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw () { return __strtoull_internal (__nptr, __endptr, __base, 0); } __extension__ extern __inline long long int strtoll (__const char *__restrict __nptr, char **__restrict __endptr, int __base) throw () { return __strtoll_internal (__nptr, __endptr, __base, 0); } __extension__ extern __inline unsigned long long int strtoull (__const char * __restrict __nptr, char **__restrict __endptr, int __base) throw () { return __strtoull_internal (__nptr, __endptr, __base, 0); } extern __inline double atof (__const char *__nptr) throw () { return strtod (__nptr, (char **) __null); } extern __inline int atoi (__const char *__nptr) throw () { return (int) strtol (__nptr, (char **) __null, 10); } extern __inline long int atol (__const char *__nptr) throw () { return strtol (__nptr, (char **) __null, 10); } __extension__ extern __inline long long int atoll (__const char *__nptr) throw () { return strtoll (__nptr, (char **) __null, 10); } # 384 "/usr/include/stdlib.h" 3 4 extern char *l64a (long int __n) throw (); extern long int a64l (__const char *__s) throw () __attribute__ ((__pure__)); # 1 "/usr/include/sys/types.h" 1 3 4 # 28 "/usr/include/sys/types.h" 3 4 extern "C" { # 1 "/usr/include/bits/types.h" 1 3 4 # 29 "/usr/include/bits/types.h" 3 4 # 1 "/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3.2/include/stddef.h" 1 3 4 # 30 "/usr/include/bits/types.h" 2 3 4 typedef unsigned char __u_char; typedef unsigned short __u_short; typedef unsigned int __u_int; typedef unsigned long __u_long; __extension__ typedef unsigned long long int __u_quad_t; __extension__ typedef long long int __quad_t; # 49 "/usr/include/bits/types.h" 3 4 typedef signed char __int8_t; typedef unsigned char __uint8_t; typedef signed short int __int16_t; typedef unsigned short int __uint16_t; typedef signed int __int32_t; typedef unsigned int __uint32_t; __extension__ typedef signed long long int __int64_t; __extension__ typedef unsigned long long int __uint64_t; typedef __quad_t *__qaddr_t; typedef __u_quad_t __dev_t; typedef __u_int __uid_t; typedef __u_int __gid_t; typedef __u_long __ino_t; typedef __u_int __mode_t; typedef __u_int __nlink_t; typedef long int __off_t; typedef __quad_t __loff_t; typedef int __pid_t; typedef int __ssize_t; typedef __u_long __rlim_t; typedef __u_quad_t __rlim64_t; typedef __u_int __id_t; typedef struct { int __val[2]; } __fsid_t; typedef int __daddr_t; typedef char *__caddr_t; typedef long int __time_t; typedef unsigned int __useconds_t; typedef long int __suseconds_t; typedef long int __swblk_t; typedef long int __clock_t; typedef int __clockid_t; typedef int __timer_t; typedef int __key_t; typedef unsigned short int __ipc_pid_t; typedef long int __blksize_t; typedef long int __blkcnt_t; typedef __quad_t __blkcnt64_t; typedef __u_long __fsblkcnt_t; typedef __u_quad_t __fsblkcnt64_t; typedef __u_long __fsfilcnt_t; typedef __u_quad_t __fsfilcnt64_t; typedef __u_quad_t __ino64_t; typedef __loff_t __off64_t; typedef long int __t_scalar_t; typedef unsigned long int __t_uscalar_t; typedef int __intptr_t; typedef unsigned int __socklen_t; # 1 "/usr/include/bits/pthreadtypes.h" 1 3 4 # 23 "/usr/include/bits/pthreadtypes.h" 3 4 # 1 "/usr/include/bits/sched.h" 1 3 4 # 68 "/usr/include/bits/sched.h" 3 4 struct __sched_param { int __sched_priority; }; # 24 "/usr/include/bits/pthreadtypes.h" 2 3 4 struct _pthread_fastlock { long int __status; int __spinlock; }; typedef struct _pthread_descr_struct *_pthread_descr; typedef struct __pthread_attr_s { int __detachstate; int __schedpolicy; struct __sched_param __schedparam; int __inheritsched; int __scope; size_t __guardsize; int __stackaddr_set; void *__stackaddr; size_t __stacksize; } pthread_attr_t; typedef struct { struct _pthread_fastlock __c_lock; _pthread_descr __c_waiting; } pthread_cond_t; typedef struct { int __dummy; } pthread_condattr_t; typedef unsigned int pthread_key_t; typedef struct { int __m_reserved; int __m_count; _pthread_descr __m_owner; int __m_kind; struct _pthread_fastlock __m_lock; } pthread_mutex_t; typedef struct { int __mutexkind; } pthread_mutexattr_t; typedef int pthread_once_t; typedef struct _pthread_rwlock_t { struct _pthread_fastlock __rw_lock; int __rw_readers; _pthread_descr __rw_writer; _pthread_descr __rw_read_waiting; _pthread_descr __rw_write_waiting; int __rw_kind; int __rw_pshared; } pthread_rwlock_t; typedef struct { int __lockkind; int __pshared; } pthread_rwlockattr_t; typedef volatile int pthread_spinlock_t; typedef struct { struct _pthread_fastlock __ba_lock; int __ba_required; int __ba_present; _pthread_descr __ba_waiting; } pthread_barrier_t; typedef struct { int __pshared; } pthread_barrierattr_t; typedef unsigned long int pthread_t; # 144 "/usr/include/bits/types.h" 2 3 4 # 31 "/usr/include/sys/types.h" 2 3 4 typedef __u_char u_char; typedef __u_short u_short; typedef __u_int u_int; typedef __u_long u_long; typedef __quad_t quad_t; typedef __u_quad_t u_quad_t; typedef __fsid_t fsid_t; typedef __loff_t loff_t; typedef __ino_t ino_t; typedef __ino64_t ino64_t; typedef __dev_t dev_t; typedef __gid_t gid_t; typedef __mode_t mode_t; typedef __nlink_t nlink_t; typedef __uid_t uid_t; typedef __off_t off_t; typedef __off64_t off64_t; typedef __pid_t pid_t; typedef __id_t id_t; typedef __ssize_t ssize_t; typedef __daddr_t daddr_t; typedef __caddr_t caddr_t; typedef __key_t key_t; # 132 "/usr/include/sys/types.h" 3 4 # 1 "/usr/include/time.h" 1 3 4 # 59 "/usr/include/time.h" 3 4 typedef __clock_t clock_t; # 70 "/usr/include/time.h" 3 4 typedef __time_t time_t; # 82 "/usr/include/time.h" 3 4 typedef __clockid_t clockid_t; # 94 "/usr/include/time.h" 3 4 typedef __timer_t timer_t; # 133 "/usr/include/sys/types.h" 2 3 4 typedef __useconds_t useconds_t; typedef __suseconds_t suseconds_t; # 1 "/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3.2/include/stddef.h" 1 3 4 # 147 "/usr/include/sys/types.h" 2 3 4 typedef unsigned long int ulong; typedef unsigned short int ushort; typedef unsigned int uint; # 190 "/usr/include/sys/types.h" 3 4 typedef int int8_t __attribute__ ((__mode__ (__QI__))); typedef int int16_t __attribute__ ((__mode__ (__HI__))); typedef int int32_t __attribute__ ((__mode__ (__SI__))); typedef int int64_t __attribute__ ((__mode__ (__DI__))); typedef unsigned int u_int8_t __attribute__ ((__mode__ (__QI__))); typedef unsigned int u_int16_t __attribute__ ((__mode__ (__HI__))); typedef unsigned int u_int32_t __attribute__ ((__mode__ (__SI__))); typedef unsigned int u_int64_t __attribute__ ((__mode__ (__DI__))); typedef int register_t __attribute__ ((__mode__ (__word__))); # 215 "/usr/include/sys/types.h" 3 4 # 1 "/usr/include/sys/select.h" 1 3 4 # 31 "/usr/include/sys/select.h" 3 4 # 1 "/usr/include/bits/select.h" 1 3 4 # 32 "/usr/include/sys/select.h" 2 3 4 # 1 "/usr/include/bits/sigset.h" 1 3 4 # 23 "/usr/include/bits/sigset.h" 3 4 typedef int __sig_atomic_t; typedef struct { unsigned long int __val[(1024 / (8 * sizeof (unsigned long int)))]; } __sigset_t; # 35 "/usr/include/sys/select.h" 2 3 4 typedef __sigset_t sigset_t; # 1 "/usr/include/time.h" 1 3 4 # 106 "/usr/include/time.h" 3 4 struct timespec { long int tv_sec; long int tv_nsec; }; # 44 "/usr/include/sys/select.h" 2 3 4 # 1 "/usr/include/bits/time.h" 1 3 4 # 67 "/usr/include/bits/time.h" 3 4 struct timeval { __time_t tv_sec; __suseconds_t tv_usec; }; # 46 "/usr/include/sys/select.h" 2 3 4 typedef long int __fd_mask; typedef struct { __fd_mask fds_bits[1024 / (8 * sizeof (__fd_mask))]; } fd_set; typedef __fd_mask fd_mask; # 89 "/usr/include/sys/select.h" 3 4 extern "C" { extern int select (int __nfds, fd_set *__restrict __readfds, fd_set *__restrict __writefds, fd_set *__restrict __exceptfds, struct timeval *__restrict __timeout) throw (); extern int pselect (int __nfds, fd_set *__restrict __readfds, fd_set *__restrict __writefds, fd_set *__restrict __exceptfds, const struct timespec *__restrict __timeout, const __sigset_t *__restrict __sigmask) throw (); } # 216 "/usr/include/sys/types.h" 2 3 4 # 1 "/usr/include/sys/sysmacros.h" 1 3 4 # 219 "/usr/include/sys/types.h" 2 3 4 typedef __blksize_t blksize_t; typedef __blkcnt_t blkcnt_t; typedef __fsblkcnt_t fsblkcnt_t; typedef __fsfilcnt_t fsfilcnt_t; # 257 "/usr/include/sys/types.h" 3 4 typedef __blkcnt64_t blkcnt64_t; typedef __fsblkcnt64_t fsblkcnt64_t; typedef __fsfilcnt64_t fsfilcnt64_t; } # 391 "/usr/include/stdlib.h" 2 3 4 extern long int random (void) throw (); extern void srandom (unsigned int __seed) throw (); extern char *initstate (unsigned int __seed, char *__statebuf, size_t __statelen) throw (); extern char *setstate (char *__statebuf) throw (); struct random_data { int32_t *fptr; int32_t *rptr; int32_t *state; int rand_type; int rand_deg; int rand_sep; int32_t *end_ptr; }; extern int random_r (struct random_data *__restrict __buf, int32_t *__restrict __result) throw (); extern int srandom_r (unsigned int __seed, struct random_data *__buf) throw (); extern int initstate_r (unsigned int __seed, char *__restrict __statebuf, size_t __statelen, struct random_data *__restrict __buf) throw (); extern int setstate_r (char *__restrict __statebuf, struct random_data *__restrict __buf) throw (); extern int rand (void) throw (); extern void srand (unsigned int __seed) throw (); extern int rand_r (unsigned int *__seed) throw (); extern double drand48 (void) throw (); extern double erand48 (unsigned short int __xsubi[3]) throw (); extern long int lrand48 (void) throw (); extern long int nrand48 (unsigned short int __xsubi[3]) throw (); extern long int mrand48 (void) throw (); extern long int jrand48 (unsigned short int __xsubi[3]) throw (); extern void srand48 (long int __seedval) throw (); extern unsigned short int *seed48 (unsigned short int __seed16v[3]) throw (); extern void lcong48 (unsigned short int __param[7]) throw (); struct drand48_data { unsigned short int __x[3]; unsigned short int __old_x[3]; unsigned short int __c; unsigned short int __init; unsigned long long int __a; }; extern int drand48_r (struct drand48_data *__restrict __buffer, double *__restrict __result) throw (); extern int erand48_r (unsigned short int __xsubi[3], struct drand48_data *__restrict __buffer, double *__restrict __result) throw (); extern int lrand48_r (struct drand48_data *__restrict __buffer, long int *__restrict __result) throw (); extern int nrand48_r (unsigned short int __xsubi[3], struct drand48_data *__restrict __buffer, long int *__restrict __result) throw (); extern int mrand48_r (struct drand48_data *__restrict __buffer, long int *__restrict __result) throw (); extern int jrand48_r (unsigned short int __xsubi[3], struct drand48_data *__restrict __buffer, long int *__restrict __result) throw (); extern int srand48_r (long int __seedval, struct drand48_data *__buffer) throw (); extern int seed48_r (unsigned short int __seed16v[3], struct drand48_data *__buffer) throw (); extern int lcong48_r (unsigned short int __param[7], struct drand48_data *__buffer) throw (); # 527 "/usr/include/stdlib.h" 3 4 extern void *malloc (size_t __size) throw () __attribute__ ((__malloc__)); extern void *calloc (size_t __nmemb, size_t __size) throw () __attribute__ ((__malloc__)); extern void *realloc (void *__ptr, size_t __size) throw () __attribute__ ((__malloc__)); extern void free (void *__ptr) throw (); extern void cfree (void *__ptr) throw (); # 1 "/usr/include/alloca.h" 1 3 4 # 25 "/usr/include/alloca.h" 3 4 # 1 "/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3.2/include/stddef.h" 1 3 4 # 26 "/usr/include/alloca.h" 2 3 4 extern "C" { extern void *alloca (size_t __size) throw (); } # 547 "/usr/include/stdlib.h" 2 3 4 extern void *valloc (size_t __size) throw () __attribute__ ((__malloc__)); extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size) throw () __attribute__ ((__malloc__)); extern void abort (void) throw () __attribute__ ((__noreturn__)); extern int atexit (void (*__func) (void)) throw (); extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg) throw (); extern void exit (int __status) throw () __attribute__ ((__noreturn__)); extern void _Exit (int __status) throw () __attribute__ ((__noreturn__)); extern char *getenv (__const char *__name) throw (); extern char *__secure_getenv (__const char *__name) throw (); extern int putenv (char *__string) throw (); extern int setenv (__const char *__name, __const char *__value, int __replace) throw (); extern int unsetenv (__const char *__name) throw (); extern int clearenv (void) throw (); # 623 "/usr/include/stdlib.h" 3 4 extern char *mktemp (char *__template) throw (); extern int mkstemp (char *__template) throw (); # 640 "/usr/include/stdlib.h" 3 4 extern int mkstemp64 (char *__template) throw (); # 650 "/usr/include/stdlib.h" 3 4 extern char *mkdtemp (char *__template) throw (); extern int system (__const char *__command) throw (); extern char *canonicalize_file_name (__const char *__name) throw (); # 672 "/usr/include/stdlib.h" 3 4 extern char *realpath (__const char *__restrict __name, char *__restrict __resolved) throw (); typedef int (*__compar_fn_t) (__const void *, __const void *); typedef __compar_fn_t comparison_fn_t; extern void *bsearch (__const void *__key, __const void *__base, size_t __nmemb, size_t __size, __compar_fn_t __compar); extern void qsort (void *__base, size_t __nmemb, size_t __size, __compar_fn_t __compar); extern int abs (int __x) throw () __attribute__ ((__const__)); extern long int labs (long int __x) throw () __attribute__ ((__const__)); __extension__ extern long long int llabs (long long int __x) throw () __attribute__ ((__const__)); extern div_t div (int __numer, int __denom) throw () __attribute__ ((__const__)); extern ldiv_t ldiv (long int __numer, long int __denom) throw () __attribute__ ((__const__)); __extension__ extern lldiv_t lldiv (long long int __numer, long long int __denom) throw () __attribute__ ((__const__)); # 728 "/usr/include/stdlib.h" 3 4 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign) throw (); extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign) throw (); extern char *gcvt (double __value, int __ndigit, char *__buf) throw (); extern char *qecvt (long double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign) throw (); extern char *qfcvt (long double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign) throw (); extern char *qgcvt (long double __value, int __ndigit, char *__buf) throw (); extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign, char *__restrict __buf, size_t __len) throw (); extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign, char *__restrict __buf, size_t __len) throw (); extern int qecvt_r (long double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign, char *__restrict __buf, size_t __len) throw (); extern int qfcvt_r (long double __value, int __ndigit, int *__restrict __decpt, int *__restrict __sign, char *__restrict __buf, size_t __len) throw (); extern int mblen (__const char *__s, size_t __n) throw (); extern int mbtowc (wchar_t *__restrict __pwc, __const char *__restrict __s, size_t __n) throw (); extern int wctomb (char *__s, wchar_t __wchar) throw (); extern size_t mbstowcs (wchar_t *__restrict __pwcs, __const char *__restrict __s, size_t __n) throw (); extern size_t wcstombs (char *__restrict __s, __const wchar_t *__restrict __pwcs, size_t __n) throw (); extern int rpmatch (__const char *__response) throw (); # 808 "/usr/include/stdlib.h" 3 4 extern int getsubopt (char **__restrict __optionp, char *__const *__restrict __tokens, char **__restrict __valuep) throw (); extern void setkey (__const char *__key) throw (); extern int posix_openpt (int __oflag) throw (); extern int grantpt (int __fd) throw (); extern int unlockpt (int __fd) throw (); extern char *ptsname (int __fd) throw (); extern int ptsname_r (int __fd, char *__buf, size_t __buflen) throw (); extern int getpt (void) throw (); extern int getloadavg (double __loadavg[], int __nelem) throw (); } # 3 "g.cpp" 2 struct gtst { unsigned char data[2]; }; static struct gtst s; int main(int argc, char *argv[]) { unsigned char * pc; struct gtst * ps; ps = &s; pc = (ps->data[0]='A', ps->data); if (&s.data[0] != pc) abort(); return 0; } ----------------------------------
Confirmed. A regression on 3.3 branch, but seems to be already fixed on mainline. W.
Subject: Bug 12181 CVSROOT: /cvs/gcc Module name: gcc Branch: gcc-3_3-branch Changes by: mmitchel@gcc.gnu.org 2003-09-07 20:53:15 Modified files: gcc/cp : ChangeLog typeck.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/expr: comma1.C Log message: PR c++/12181 * typeck.c (build_modify_expr): Don't always stabilize the lhs and rhs. Do stabilize the lhs of a MODIFY_EXPR used on the lhs. PR c++/12181 * g++.dg/expr/comma1.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.3076.2.201&r2=1.3076.2.202 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/typeck.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.436.2.14&r2=1.436.2.15 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.2261.2.270&r2=1.2261.2.271 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/expr/comma1.C.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=NONE&r2=1.1.2.1
Subject: Bug 12181 CVSROOT: /cvs/gcc Module name: gcc Changes by: mmitchel@gcc.gnu.org 2003-09-07 20:54:11 Modified files: gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/expr: comma1.C Log message: PR c++/12181 * g++.dg/expr/comma1.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3034&r2=1.3035 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/expr/comma1.C.diff?cvsroot=gcc&r1=1.1&r2=1.2
Fixed in GCC 3.3.2.