templated lambda binding error

[urnathan]

struct Pair { int a;};
Pair Foo ();

auto Bar ()
{
  auto [b] = Foo ();  // b must be a structured binding
  
  return [&] <typename T> (T) { return b; } (1); // lambda must be a template
}

AFAICT that's well formed. GCC accepts.

$ ~/llvm/trunk/build/bin/clang++ -std=c++20 -c binding.cc
binding.cc:8:40: error: reference to local binding 'b' declared in enclosing function 'Bar'
  return [&] <typename T> (T) { return b; } (1);
                                       ^
binding.cc:8:45: note: in instantiation of function template specialization 'Bar()::(anonymous class)::operator()<int>' requested here
  return [&] <typename T> (T) { return b; } (1);
                                            ^
binding.cc:6:9: note: 'b' declared here
  auto [b] = Foo ();
        ^
1 error generated.

[llvmbot]

@llvm/issue-subscribers-clang-frontend

[cor3ntin]

Thanks!
This was fixed by e1111e2