https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82456
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-01-14
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=81437
Ever confirmed|0 |1
Known to fail| |7.3.0, 8.2.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
GCC 8.2.0 and 9 issue two warnings, one for each of fcst and frng, but none for
gcst or grng, so confirming those are still missing.
See also bug 81437 for a similar (the same?) problem.
$ gcc -O2 -S -Wall z.c
z.c: In function ‘fcst’:
z.c:5:3: warning: array subscript 3 is above array bounds of ‘char[2]’
[-Warray-bounds]
__builtin_strcpy (d, a + 3); // -Warray-bounds (good)
^~~~~~~~~~~~~~~~~~~~~~~~~~~
z.c:5:3: warning: ‘__builtin_strcpy’ offset 3 is out of the bounds [0, 2] of
object ‘a’ with type ‘char[2]’ [-Warray-bounds]
z.c:3:8: note: ‘a’ declared here
char a[2] = "0";
^
z.c: In function ‘frng’:
z.c:16:3: warning: ‘__builtin_strcpy’ offset [3, 2147483647] is out of the
bounds [0, 2] of object ‘a’ with type ‘char[2]’ [-Warray-bounds]
__builtin_strcpy (d, a + i); // both warnings missing
^~~~~~~~~~~~~~~~~~~~~~~~~~~
z.c:11:8: note: ‘a’ declared here
char a[2] = "0";
^
