[Bug c++/92852] [8/9/10 Regression] location references block not in block tree

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92852

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Aha.  Reduced testcase:

struct S { int operator<<(const int &); } glob;
void foo()
{
  S& message_stream = glob;
  auto format = [&message_stream](auto && x) { message_stream << x ;};
  format(3);
  format(4u);
}