Tying a C++ iostream object to itself causes a stack overflow in visual studio 2012 - by Davis King

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  Fixed<br /><br />
		This item has been fixed in the current or upcoming version of this product.<br /><br />
		A more detailed explanation for the resolution of this particular item may have been provided in the comments section.

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ID 772293 Comments
Status Closed Workarounds
Type Bug Repros 3
Opened 11/26/2012 5:21:00 PM
Access Restriction Public


The following code will cause a stack overflow in visual studio 2012 express:

#include <iostream>

int main()
   std::cout << "boom";

I looked in the standard and it seems that you should be allowed to tie a stream to itself.  This is a somewhat silly example but it is useful in other cases.  For example, in the asio networking library it is useful and common to have a tcp iostream tied to itself so that read attempts cause automatic flushing.  

Other people seem to have run into this problem as well.  For example, see: http://stackoverflow.com/questions/11924601/runtime-error-of-boost-asynchronous-i-o-example

The poster at stackoverflow.com is experiencing the same error as I am.  In particular, what happens is that ostream::flush() constructs a sentry which then calls ostream::flush() and this repeats until the stack runs out.
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Posted by Deon [MSFT] on 4/29/2014 at 12:31 PM
Thank you for reporting this issue. This issue has been fixed in Visual Studio 2013. You can install a trial version of Visual Studio 2013 with the fix from: http://go.microsoft.com/?linkid=9832436
Posted by Stephan [MSFT] on 2/28/2013 at 4:47 PM

Thanks for reporting this bug. We've fixed it, and the fix will be available in VC12. (Note: VC8 = VS 2005, VC9 = VS 2008, VC10 = VS 2010, VC11 = VS 2012.)

Note: Connect doesn't notify me about comments. If you have any further questions, please E-mail me.

Stephan T. Lavavej
Senior Developer - Visual C++ Libraries
Posted by Macy [MSFT] on 11/27/2012 at 2:10 AM
Thanks for your feedback.

We are rerouting this issue to the appropriate group within the Visual Studio Product Team for triage and resolution. These specialized experts will follow-up with your issue.
Posted by Macy [MSFT] on 11/26/2012 at 5:53 PM
Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)