[Bug c++/103455] [9/10/11/12 Regression] internal compiler error: in dependent_type_p since r9-713-gd9338471b91bbe6e1

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103455

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:04f19580e8dbdbc7366d0f5fd068aa0cecafdc9d

commit r12-7830-g04f19580e8dbdbc7366d0f5fd068aa0cecafdc9d
Author: Patrick Palka <ppalka@redhat.com>
Date:   Sat Mar 26 10:20:16 2022 -0400

    c++: ICE when building builtin operator->* set [PR103455]

    Here when constructing the builtin operator->* candidate set according
    to the available conversion functions for the operand types, we end up
    considering a candidate with C1=T (through B's dependent conversion
    function) and C2=F, during which we crash from DERIVED_FROM_P because
    dependent_type_p sees a TEMPLATE_TYPE_PARM outside of a template
    context.

    Sidestepping the question of whether we should be considering such a
    dependent conversion function here in the first place, it seems futile
    to test DERIVED_FROM_P for anything other than an actual class type, so
    this patch fixes this ICE by simply guarding the DERIVED_FROM_P test
    with CLASS_TYPE_P instead of MAYBE_CLASS_TYPE_P.

            PR c++/103455

    gcc/cp/ChangeLog:

            * call.cc (add_builtin_candidate) <case MEMBER_REF>: Test
            CLASS_TYPE_P instead of MAYBE_CLASS_TYPE_P.

    gcc/testsuite/ChangeLog:

            * g++.dg/overload/builtin6.C: New test.