https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85205
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- It is UB, but as extension we try to accept such code as poor man's flexible array members. This works on the trunk as expected starting with r255775 aka PR77291 fix.