[Bug libstdc++/111550] The range adaptor closure object generated by adaptor(args...) is not a perfect forwarding call wrapper

[hewillk at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111550

--- Comment #2 from 康桓瑋 <hewillk at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> I think all four bugs related to adaptor closures are very similar and could
> be a single bug report.

Perhaps. Maybe I should collect them all. Sorry for bringing up bits and
pieces.