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Subject: [Bug c++/104107] [9/10/11 Regression] parsing crashes on class
 template instantiation since r9-6853-g17838af989014f5e
Date: Mon, 28 Mar 2022 19:13:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104107

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:

https://gcc.gnu.org/g:450e82794245c49248711f1479c491d84cb46c57

commit r11-9708-g450e82794245c49248711f1479c491d84cb46c57
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Feb 10 17:57:38 2022 -0500

    c++: TTP in member alias template [PR104107]

    In the first testcase, coerce_template_template_parms was adding too mu=
ch
of
    outer_args when coercing to match P's template parameters, so that when
    substituting into the 'const T&' parameter we got an unrelated template
    argument for T.  We should only add outer_args when the argument templa=
te
is
    a nested template.

            PR c++/104107
            PR c++/95036

    gcc/cp/ChangeLog:

            * pt.c (coerce_template_template_parms): Take full parms.
            Avoid adding too much of outer_args.
            (coerce_template_template_parm): Adjust.
            (template_template_parm_bindings_ok_p): Adjust.
            (convert_template_argument): Adjust.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp0x/alias-decl-ttp2.C: New test.
            * g++.dg/cpp1z/ttp2.C: New test.=