[Bug c++/94008] "use of deleted function" error when using "std::unique_ptr", std::move() and lambda

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94008

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Xuehan Xu from comment #0)
>   test_lambda([test_uniq = std::move(test_uniq)] {
>       test_lambda([test_uniq = std::move(test_uniq)] {});

The operator() of the closure object is a const member function, so test_uniq
is const and can't be moved. Attempting to move it will copy it, which fails
because unique_ptr is not copyable.