http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47418
--- Comment #3 from Xavier <chantry.xavier at gmail dot com> 2011-01-23 02:06:35 UTC --- Created attachment 23084 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23084 simpler testcase $ gcc -O3 -Wall -c small-test.c small-test.c: In function 'main': small-test.c:18:51: warning: array subscript is above array bounds small-test.c:18:43: warning: array subscript is above array bounds small-test.c:18:35: warning: array subscript is above array bounds so gcc seems to think that the size of ap is 13 instead of 16. It's important that ap and sa_data are both char, and u6_addr8 is unsigned char. Same warning if ap and sa_data are unsigned char and u6_addr8 is char. But other combinations apparently do not give any warning.
