[Bug c++/106311] [12/13 Regression] internal compiler error in redeclare_class_template

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106311

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Marek Polacek
<mpola...@gcc.gnu.org>:

https://gcc.gnu.org/g:9be0feeadeeac2166fbe3823421bc5712bc59087

commit r12-8619-g9be0feeadeeac2166fbe3823421bc5712bc59087
Author: Marek Polacek <pola...@redhat.com>
Date:   Fri Jul 15 09:51:50 2022 -0400

    c++: ICE with erroneous template redeclaration [PR106311]

    Here we ICE trying to get DECL_SOURCE_LOCATION of the parm that happens
    to be error_mark_node in this ill-formed test.  I kept running into this
    while reducing code, so it'd be good to have it fixed.

            PR c++/106311

    gcc/cp/ChangeLog:

            * pt.cc (redeclare_class_template): Check DECL_P before accessing
            DECL_SOURCE_LOCATION.

    gcc/testsuite/ChangeLog:

            * g++.dg/template/redecl5.C: New test.

    (cherry picked from commit 2333b58c9892667545d0c2c3ecd2d7b947197511)