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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98687

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Marek Polacek <mpolacek@gcc.gnu.org>:

https://gcc.gnu.org/g:d89b00c095e99cd5cb6d3e05f30d3a61fa592000

commit r11-6802-gd89b00c095e99cd5cb6d3e05f30d3a61fa592000
Author: Marek Polacek <polacek@redhat.com>
Date:   Thu Jan 14 22:14:38 2021 -0500

    c++: ICE with USING_DECL redeclaration [PR98687]

    My recent patch that introduced push_using_decl_bindings didn't
    handle USING_DECL redeclaration, therefore things broke.  This patch
    amends that by breaking out a part of finish_nonmember_using_decl
    out to a separate function, push_using_decl_bindings, and calling it.
    It needs an overload, because name_lookup is only available inside
    of name-lookup.c.

    gcc/cp/ChangeLog:

            PR c++/98687
            * name-lookup.c (push_using_decl_bindings): New, broken out of.=
..
            (finish_nonmember_using_decl): ...here.
            * name-lookup.h (push_using_decl_bindings): Update declaration.
            * pt.c (tsubst_expr): Update the call to push_using_decl_bindin=
gs.

    gcc/testsuite/ChangeLog:

            PR c++/98687
            * g++.dg/lookup/using64.C: New test.
            * g++.dg/lookup/using65.C: New test.=