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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/108566] [11/12 Regression] ICE: tree check: expected tree
 that contains 'decl with visibility' structure, have 'field_decl' in
 write_unqualified_name with anonymous struct inside an anonymous union since
 r11-2016-g6324c52bba490baa
Date: Tue, 18 Apr 2023 20:45:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108566

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:

https://gcc.gnu.org/g:f483dc1367294d02581e2d98c5f84be4dd67f26b

commit r12-9431-gf483dc1367294d02581e2d98c5f84be4dd67f26b
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Mar 9 23:33:43 2023 -0500

    c++: class NTTP and nested anon union [PR108566]

    We were failing to come up with the name for the anonymous union.  It s=
eems
    like unfortunate redundancy, but the ABI does say that the name of an
    anonymous union is its first named member.

            PR c++/108566

    gcc/cp/ChangeLog:

            * mangle.cc (anon_aggr_naming_decl): New.
            (write_unqualified_name): Use it.

    gcc/testsuite/ChangeLog:

            * g++.dg/abi/anon6.C: New test.=