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Testcase is attached. Some invocations of stpcpy work, some don't.
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#include <stdio.h>
//char *stpcpy(char *__restrict s1, const char *__restrict s2);
int
main (int argc, char **argv)
{
char buf[1000];
#if 1
char *p = stpcpy (buf, (const char *) argv[0]); //this doesn't work
printf ("buf = %s, p = %s\n", buf, p);
#elif 0
stpcpy (buf, (const char *) argv[0]); // this works
printf ("buf = %s\n", buf);
#elif 0
char *p = stpcpy (buf, (const char *) "123"); // this works too
printf ("buf = %s, p = %s\n", buf, p);
#endif
return 0;
}
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