[Bug c++/103572] [13/14 Regression] ICE in build_function_type after undefined type as a template argument during class template argument deduction

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103572

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[13/14/15/16 Regression]    |[13/14 Regression] ICE in
                   |ICE in build_function_type  |build_function_type after
                   |after undefined type as a   |undefined type as a
                   |template argument during    |template argument during
                   |class template argument     |class template argument
                   |deduction                   |deduction
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2026-02-13
     Ever confirmed|0                           |1
      Known to work|                            |15.1.1, 16.0
           Keywords|                            |fixed-but-no-testcase

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
No longer ICEs on 15 branch or trunk.  Re-confirmed on 14 branch.