[Bug c++/127296] [c++26][contracts] a coroutine's postcondition may odr-use a const by-value parameter, which is ill-formed

[berne at notadragon dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127296

--- Comment #1 from Joshua Berne <berne at notadragon dot com> ---
Created attachment 65542
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65542&action=edit
Preprocessed source, produced with `-save-temps`