[Bug c++/108468] [11/12/13 Regression] ICE in most_specialized_partial_spec/builtin_guide_p in C++20 mode

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108468

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |11.4
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |NEW
           Priority|P3                          |P2
   Last reconfirmed|                            |2023-01-19
            Summary|ICE in                      |[11/12/13 Regression] ICE
                   |most_specialized_partial_sp |in
                   |ec/builtin_guide_p in C++20 |most_specialized_partial_sp
                   |mode                        |ec/builtin_guide_p in C++20
                   |                            |mode
     Ever confirmed|0                           |1
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.  Started with r11-1615-g6b161257f9f8c7:

commit 6b161257f9f8c7a26b7d119ebc32cbbc54d2e508
Author: Jason Merrill <jason@redhat.com>
Date:   Mon Jun 22 15:44:45 2020 -0400

    c++: Improve CTAD for aggregates [PR93976]

    P2082R1 adjusted the rules for class template argument deduction for an
    aggregate to better handle arrays and pack expansions.