[Bug libstdc++/105375] std::packaged_task has no deduction guide.

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105375

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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   Target Milestone|---                         |11.4

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for GCC 12, but worth backporting to GCC 11 too.