[Bug libstdc++/60178] std::mutex::try_lock failing

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60178

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
          Component|c++                         |libstdc++
         Resolution|---                         |WORKSFORME

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You need to use -pthread

The program has undefined behaviour anyway due to locking the same mutex twice
in a single thread.