[Boost-bugs] [Boost C++ Libraries] #8068: Bad Memory Access in boost::future<>.then() after accessing given future

Subject: [Boost-bugs] [Boost C++ Libraries] #8068: Bad Memory Access in boost::future<>.then() after accessing given future
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-15 07:27:00

#8068: Bad Memory Access in boost::future<>.then() after accessing given future
-----------------------------------------------------+----------------------
 Reporter:  Stephan Mehlhase <s.mehlhase@…>          |       Owner:  anthonyw
     Type:  Bugs                                     |      Status:  new     
Milestone:  To Be Determined                         |   Component:  threads 
  Version:  Boost 1.53.0                             |    Severity:  Problem 
 Keywords:                                           |  
-----------------------------------------------------+----------------------
 When using "then" on a future and accessing the value of the future in the
 continuation, the memory of the future is freed/released and the further
 execution of the continuation happens in an undefined limbo state (leading
 to a crash with EXC_BAC_ACCESS at least on iOS.

 Here is a minimal example:
 {{{
 #define BOOST_THREAD_VERSION 4
 #include <boost/thread.hpp>

 class Test {

 public:
     void test() {
         boost::shared_ptr<Test> listener(new Test());
         boost::future<bool> con = boost::make_future(true);
         listener->foo(); // Works
         boost::future<bool> initDone =
 con.then([listener](boost::future<bool>& connected) {
             listener->foo(); // Works
             if (!connected.get()) {
                 listener->foo();
                 return false;
             }
             listener->foo();  // EXC_BAD_ACCESS
             return true;
         });
     }

     void foo() {
         std::cout << "foo";
     }
 };
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8068>
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