[Bug c++/116502] [15 Regression] -Wunused-result warning cannot be suppressed if coroutine awaiter returns a reference after r15-2318-g2664c1bf83855b

[daklishch at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116502

--- Comment #2 from Dan Klishch <daklishch at gmail dot com> ---
Can confirm that the patch fixes both the minified reproducer from the bug
report and also the original reproducer (TestAsyncTestStreams from SerenityOS).