https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92601
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:091fe099ba9093b8577ad4a10b56e18c6ea3daea commit r10-6232-g091fe099ba9093b8577ad4a10b56e18c6ea3daea Author: Jason Merrill <ja...@redhat.com> Date: Sat Jan 25 23:09:57 2020 -0500 checking: avoid verify_type_variant crash on incomplete type. Here, we end up calling gen_type_die_with_usage for a type that's in the middle of finish_struct_1, after we set TYPE_NEEDS_CONSTRUCTING on it but before we copy all the flags to the variants--and, significantly, before we set its TYPE_SIZE. It seems reasonable to only look at TYPE_NEEDS_CONSTRUCTING on complete types, since we aren't going to try to create an object of an incomplete type any other way. PR c++/92601 * tree.c (verify_type_variant): Only verify TYPE_NEEDS_CONSTRUCTING of complete types.