[Bug c++/100489] [10/11/12 Regression] ICE in cp/constexpr.c:3556

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100489

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:

https://gcc.gnu.org/g:a335afe208cd27cf8ee4cb028fb7769700ab6245

commit r10-9857-ga335afe208cd27cf8ee4cb028fb7769700ab6245
Author: Jason Merrill <jason@redhat.com>
Date:   Wed May 19 21:12:45 2021 -0400

    c++: designated init with anonymous union [PR100489]

    My patch for PR98463 added an assert that tripped on this testcase, because
    we ended up with a U CONSTRUCTOR with an initializer for a, which is not a
    member of U.  We need to wrap the a initializer in another CONSTRUCTOR for
    the anonymous union.

    For the GCC 10 branch, just remove the assert.

            PR c++/100489

    gcc/cp/ChangeLog:

            * constexpr.c (get_or_insert_ctor_field): Remove assert.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/desig18.C: New test.