[Bug c++/122632] [16 Regression] ICE: Segmentation fault when issuing a diagnostics message (C++26)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122632

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |mpolacek at gcc dot 
gnu.org
                 CC|                            |mpolacek at gcc dot gnu.org
            Summary|ICE: Segmentation fault     |[16 Regression] ICE:
                   |when issuing a diagnostics  |Segmentation fault when
                   |message (C++26)             |issuing a diagnostics
                   |                            |message (C++26)
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2025-12-03
   Target Milestone|---                         |16.0
     Ever confirmed|0                           |1

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with my r16-3195.  Before:

122632.C: In function ‘void f(auto:1 ...)’:
122632.C:2:46: error: ‘y’ was not declared in this scope [-Wtemplate-body]
    2 |         [...y = x] noexcept((... && noexcept(y))) {};
      |                                              ^