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Subject: [Bug c++/112580] [14 Regression]: 
 g++.dg/modules/xtreme-header-4_b.C et al; ICE tree check: expected class
 'type', have 'declaration'
Date: Mon, 11 Dec 2023 02:34:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112580

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathaniel Shead <nshead@gcc.gnu.org>:

https://gcc.gnu.org/g:ab3daffcbf35566d468c3028e48068a481048baf

commit r14-6394-gab3daffcbf35566d468c3028e48068a481048baf
Author: Nathaniel Shead <nathanieloshead@gmail.com>
Date:   Thu Nov 23 23:15:19 2023 +1100

    c++: Clear uninstantiated template friend when instantiating [PR104234]

    Otherwise attempting to get the originating module declaration ICEs
    because the DECL_CHAIN of an instantiated friend template is no longer
    its context.

            PR c++/104234
            PR c++/112580

    gcc/cp/ChangeLog:

            * pt.cc (tsubst_template_decl): Clear
            DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P.

    gcc/testsuite/ChangeLog:

            * g++.dg/modules/pr104234.C: New test.

    Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>=