[Boost-bugs] [Boost C++ Libraries] #11291: Boost future continuations failing on OS X

Subject: [Boost-bugs] [Boost C++ Libraries] #11291: Boost future continuations failing on OS X
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-05-13 01:23:56

#11291: Boost future continuations failing on OS X
------------------------------+-------------------------
 Reporter:  chappedm@…        |      Owner:  anthonyw
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  thread
  Version:  Boost 1.57.0      |   Severity:  Showstopper
 Keywords:                    |
------------------------------+-------------------------
 I have a problem with using boost future continuations via then(). I am
 building Boost 1.58 for both Linux 64-bit and OS X 64-bit. I have the
 following code that executes correctly:


 {{{
         auto future = session().join(m_realm);
         uint64_t session_id = future.get();
         TRACE(trace_logger) << "session joined: session_id " <<
 session_id;
 }}}

 However if I re-write it as:

 {{{
         auto future = session().join(m_realm).then(
             [](boost::future<uint64_t>) {
                 uint64_t session_id = future.get();
                 TRACE(trace_logger) << "session joined: session_id " <<
 session_id;
             }).wait();
 }}}

 then the continuation is never called and I am stuck waiting on this
 future to be resolved for indefinitely. Seems to be a data race of some
 kind. Unfortunately, I don't have a minimal test case to reproduce the
 issue yet. If I force the promise to be satisfied before acquiring the
 future and calling wait then it works as expected. So I suspect that this
 is a data race of sorts.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11291>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.