https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95276
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> --- Created attachment 48586 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48586&action=edit (somewhat reduced) test case Here's a somewhat reduced test case; I did not spend too much time throwing out unnecessary functions or declarations. The warning I now see is In function 'ztoa_big', inlined from 'write_z' at w2.i:6499:11: w2.i:6484:6: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 6484 | *q = '\0'; | ~~~^~~~~~ w2.i: In function 'write_z': w2.i:6495:8: note: at offset 0 to object 'itoa_buf' with size 33 declared here 6495 | char itoa_buf[((sizeof (GFC_REAL_16)) * 2 + 1)]; | ^~~~~~~~ so the really big number is gone.
