Re: [Boost-users] [Thread] program crashes from time to time when deleting unique_future<void>

Subject: Re: [Boost-users] [Thread] program crashes from time to time when deleting unique_future<void>
From: Alex Perry (Alex.Perry_at_[hidden])
Date: 2011-11-21 15:33:51

On Mon, 21 Nov 2011 16:40:04 +0000 "Soderback, Johan" <Johan.Soderback_at_[hidden]> wrote :-
> Hi,
> 
> I have a small example program that crashes from time to time.
> I would appreciate some help to understand why.
> 
> In function run() executed on the main thread I create a packaged_task (pt),
> put it in a queue (_q) and wait for it to get executed (fu.get()).
> In another thread the tasks are executed when the queue _q is populated.
> The task I'm running always throws/rethrows intentionally.
> 
> It results (from time to time) in an access violation when the unique_future,
> fu, is deleted.
> See the stack trace at the bottom.
> 
> Anybody see any flaws in this design?
> 
> I have tried 1.47.0 and 1.48.0,  MSVC 2005.
> 

Trying your example on vs2010 it crashes continuously - changing  your throwf() function to the following appears to sort it - not quite sure why a simple throw fails though - or whether this was your problem under vs2005

void throwf()
{
  try
  {
    BOOST_THROW_EXCEPTION(TheException());	
  }
  catch (boost::exception const & )
  {
     boost::rethrow_exception( boost::current_exception() );
  }
}

HTH

Alex