[Bug c++/103572] New: [11/12 Regression] ICE in build_function_type after undefined type as a template argument during class template argument deduction

[pinskia at gcc dot gnu.org]

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

            Bug ID: 103572
           Summary: [11/12 Regression] ICE in build_function_type after
                    undefined type as a template argument during class
                    template argument deduction
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: error-recovery, ice-on-invalid-code
          Severity: trivial
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Reduced testcase:
template <view_concept urng_t>
class view
{
  view(view const & rhs) = default;
};
view v1(0);

---- CUT ----
GCC 10 did not ICE:
<source>:1:11: error: 'view_concept' has not been declared
    1 | template <view_concept urng_t>
      |           ^~~~~~~~~~~~
<source>:6:10: error: class template argument deduction failed:
    6 | view v1(0);
      |          ^
<source>:6:10: error: no matching function for call to 'view(int)'
<source>:4:3: note: candidate: 'template<<declaration error> > view(const
view<<declaration error> >&)-> view<<declaration error> >'
    4 |   view(view const & rhs) = default;
      |   ^~~~
<source>:4:3: note:   template argument deduction/substitution failed:
<source>:2:7: note: candidate: 'template<<declaration error> >
view(view<<declaration error> >)-> view<<declaration error> >'
    2 | class view
      |       ^~~~
<source>:2:7: note:   template argument deduction/substitution failed: