[Bug c++/95066] [C++ 20] Incorrect successful compilation with a conditional explicit

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95066

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Marek Polacek
<mpolacek@gcc.gnu.org>:

https://gcc.gnu.org/g:ae275b986b8cc747a5b4f389cb05a71fdee1f886

commit r10-8280-gae275b986b8cc747a5b4f389cb05a71fdee1f886
Author: Marek Polacek <polacek@redhat.com>
Date:   Thu Jun 11 16:33:13 2020 -0400

    c++: explicit(bool) malfunction with dependent expression [PR95066]

    I forgot to set DECL_HAS_DEPENDENT_EXPLICIT_SPEC_P when merging two
    function declarations and as a sad consequence, we never tsubsted
    the dependent explicit-specifier in tsubst_function_decl, leading to
    disregarding the explicit-specifier altogether, and wrongly accepting
    this test.

            PR c++/95066
            * decl.c (duplicate_decls): Set DECL_HAS_DEPENDENT_EXPLICIT_SPEC_P.

            * g++.dg/cpp2a/explicit16.C: New test.