[Bug c++/99423] [modules] ICE tree check: expected tree_vec, have ggc_freed in lookup_template_class_1, at cp/pt.c:9803

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99423

--- Comment #2 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:1f428775acc391c8ce4fcf79b243043f3333cc99

commit r11-7610-g1f428775acc391c8ce4fcf79b243043f3333cc99
Author: Nathan Sidwell <nat...@acm.org>
Date:   Wed Mar 10 12:07:24 2021 -0800

    c++: ICE do to GC leakage [PR 99423]

    My reworking of pending-entity loading introduced a GC problem.  The
    post-load processing needs to inhibit GCs (that would otherwise occur
    in clone_decl).  That wasn't happening on one code path, leading to
    dangling pointers in the active call frames.

            PR c++/99423
            gcc/cp/
            * module.cc (post_load_processing): Assert not gcable.
            (laxy_load_pendings): Extend no-gc region around
            post_load_processing.
            gcc/testsuite/
            * g++.dg/modules/pr99423_a.H: New.
            * g++.dg/modules/pr99423_b.H: New.