https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104964
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> --- Note the test-case is reduced from acl package (with -D_FORTIFY_SOURCE=3) that used to work with -D_FORTIFY_SOURCE=2. So maybe my reduction was too aggressive or should the current master support trailing arrays?
