[Bug c++/120243] [15/16 Regression] Exception rethrown from coroutine promise type unhandled_exception not caught under -O1

[jason at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120243

--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #10)
> that's fine too - my plan is to back port the stack of changes made on trunk
> rather than doing piecemeal - to try and avoid churn..

Yeah, backporting this patch by itself seems to regress
g++.dg/coroutines/torture/exceptions-test-01-n4849-a.C so I'll leave it to you
after al.