[Bug c++/101133] [coroutines] co_await doesn't accept a valid awaitable object if await_resume()'s return type is not a built-in type.

[s_gccbugzilla at nedprod dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101133

Niall Douglas <s_gccbugzilla at nedprod dot com> changed:

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                 CC|                            |s_gccbugzilla at nedprod dot 
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--- Comment #4 from Niall Douglas <s_gccbugzilla at nedprod dot com> ---
Looks like this fix didn't get backported into the 11 branch, as the 11.3
release is also broken.

https://godbolt.org/z/ojo759Md1