https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106695
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:47f0bd269403762ddb71b8c6165b30ace4f70a8b commit r12-8747-g47f0bd269403762ddb71b8c6165b30ace4f70a8b Author: Jonathan Wakely <jwak...@redhat.com> Date: Mon Aug 22 15:42:17 2022 +0100 libstdc++: Fix for explicit copy ctors in <thread> and <future> [PR106695] When I changed std::thread and std::async to avoid unnecessary move construction of temporaries, I introduced a regression where types with an explicit copy constructor could not be passed to std::thread or std::async. The fix is to add a constructor instead of using aggregate initialization of an unnamed temporary. libstdc++-v3/ChangeLog: PR libstdc++/106695 * include/bits/std_thread.h (thread::_State_impl): Forward individual arguments to _Invoker constructor. (thread::_Invoker): Add constructor. Delete copies. * include/std/future (__future_base::_Deferred_state): Forward individual arguments to _Invoker constructor. (__future_base::_Async_state_impl): Likewise. * testsuite/30_threads/async/106695.cc: New test. * testsuite/30_threads/thread/106695.cc: New test. (cherry picked from commit 5abe0657553580bd1b7488dd84d55138a8d9f23c)
