https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99023
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Nathan Sidwell <nat...@gcc.gnu.org>: https://gcc.gnu.org/g:d8889c99aab4b599aa7ceb7079e69a9766171336 commit r11-7271-gd8889c99aab4b599aa7ceb7079e69a9766171336 Author: Nathan Sidwell <nat...@acm.org> Date: Wed Feb 17 10:43:21 2021 -0800 c++: Macros need to be GTY-reachable [PR 99023] I'd missed that macros were allocated from GC storage, and that they can become unattached from an identifier, and therefore not GC-reachable. And then bad things happen. Fixed by making the module machinery's reference vector a GC root. PR c++/99023 gcc/cp/ * module.cc (struct macro_export): Add GTY markers. (macro_exports): Likewise, us a va_gc Vector. gcc/testsuite/ * g++.dg/modules/pr99023_a.H: New. * g++.dg/modules/pr99023_b.H: New.
