[Bug libstdc++/84532] [7/8 Regression] std::thread::__make_invoker prematurely unwraps reference_wrappers

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84532

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Feb 23 23:23:43 2018
New Revision: 257956

URL: https://gcc.gnu.org/viewcvs?rev=257956&root=gcc&view=rev
Log:
PR libstdc++/84532 prevent unwrapping of reference_wrapper arguments

        PR libstdc++/84532
        * include/std/thread (thread::__make_invoker): Construct tuple
        directly instead of using make_tuple.
        * testsuite/30_threads/async/84532.cc: New.
        * testsuite/30_threads/thread/84532.cc: New.

Added:
    trunk/libstdc++-v3/testsuite/30_threads/async/84532.cc
    trunk/libstdc++-v3/testsuite/30_threads/thread/84532.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/std/thread