[Bug c++/97533] New: ICE encountering operator() within lambda expression within templated struct

[harry at mccleave dot ca via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97533

            Bug ID: 97533
           Summary: ICE encountering operator() within lambda expression
                    within templated struct
           Product: gcc
           Version: 10.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: harry at mccleave dot ca
  Target Milestone: ---

gcc version: 10.2
options: /std:c++17
Issue: internal compiler error
godbolt link: https://godbolt.org/z/W4GGnE
reduced code that replicates:
template<typename T>
struct Blah
{
  void operator()(int& a,int& b) {
    [this](auto&... args) {
      (operator()(args),...);
    }(a, b);
  }
};

int main() {
  Blah<void> proc;
  int a, b;
  proc(a, b);
}