[Bug c++/104847] [11 Regression] ICE in write_unqualified_name, at cp/mangle.cc:1406

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104847

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jason Merrill
<ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:07d7e8b8ae2879241207631fcaeaa83e5e85a240

commit r11-9706-g07d7e8b8ae2879241207631fcaeaa83e5e85a240
Author: Jason Merrill <ja...@redhat.com>
Date:   Sat Mar 26 20:10:19 2022 -0400

    c++: mangling union{1} in template [PR104847]

    My implementation of union non-type template arguments in r11-2016 broke
    braced casts of union type, because they are still in syntactic
(undigested)
    form.

            PR c++/104847

    gcc/cp/ChangeLog:

            * mangle.c (write_expression): Don't write a union designator when
            undigested.

    gcc/testsuite/ChangeLog:

            * g++.dg/abi/mangle-union1.C: New test.