[Bug c++/99897] New: ICE Segmentation fault when operator appear in template parameter-list

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99897

            Bug ID: 99897
           Summary: ICE Segmentation fault when operator appear in
                    template parameter-list
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hewillk at gmail dot com
  Target Milestone: ---

https://godbolt.org/z/fjx8cG995

template <int> struct A {};
template <A a> struct S { void foo(S<+a>); };


<source>:2:40: internal compiler error: Segmentation fault
    2 | template <A a> struct S { void foo(S<+a>); };
      |                                        ^
0x1cfd119 internal_error(char const*, ...)
        ???:0
0x6c4475 resolve_args(vec<tree_node*, va_gc, vl_embed>*, int)
        ???:0
0x9093b1 do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
        ???:0
0x929803 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
        ???:0
0x97ff1d finish_template_type(tree_node*, tree_node*, int)
        ???:0
0x8e140d c_parse_file()
        ???:0
0xa606f2 c_common_parse_file()
        ???:0
Please submit a full bug report,
with preprocessed source if appropriate.