[Bug c++/99285] [modules] ICE canonical types differ for identical types ‘std::common_type...

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99285

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathan Sidwell <nathan@gcc.gnu.org>:

https://gcc.gnu.org/g:ded6a1953dd7f43229c44e5d0d17c264338a3f4c

commit r11-7557-gded6a1953dd7f43229c44e5d0d17c264338a3f4c
Author: Nathan Sidwell <nathan@acm.org>
Date:   Mon Mar 8 10:01:21 2021 -0800

    c++: Incorrect specialization hash table [PR 99285]

    Class template partial specializations need to be in the
    specialization hash, but not all of them.  This defers adding
    streamed-in entities to the hash table, in the same way I deferred
    adding the instantiation and specialization lists for 99170.

            PR c++/99285
            gcc/cp/
            * cp-tree.h (match_mergeable_specialization)
            (add_mergeable_specialization): Adjust parms.
            * module.cc (trees_in::decl_value): Adjust
            add_mergeable_specialization calls.
            (trees_out::key_mergeable): Adjust match_mergeable_specialization
            calls.
            (specialization_add): Likewise.
            * pt.c (match_mergeable_specialization): Do not insert.
            (add_mergeable_specialization): Add to hash table here.
            gcc/testsuite/
            * g++.dg/modules/pr99285_a.H: New.
            * g++.dg/modules/pr99285_b.H: New.