https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100137
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org --- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- The warning bug was introduced in r262893 (GCC 10). A trivial test case is: $ cat a.c && gcc -O2 -S -Wall a.c int f (long i) { const char *p = "123"; p += i; return p[-1]; } a.c: In function ‘f’: a.c:5:11: warning: array subscript -1 is outside array bounds of ‘char[4]’ [-Warray-bounds] 5 | return p[-1]; | ~^~~~ This same thing is handled correctly elsewhere (e.h., -Wstringop_overflow) so the ideal fix is to replace the warning code with the new pointer_query class.