[Bug c++/96749] [coroutines] unexpected 'warning: statement has no effect [-Wunused-value]'

[bazhenov.dn at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96749

--- Comment #1 from Dmitry Bazhenov <bazhenov.dn at gmail dot com> ---
Created attachment 49101
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49101&action=edit
statement-has-no-effect.cpp

Code snippet revealing the problem.