[GHC] #8014: Assertion failure when using multithreading in debug mode.

[GHC]

#8014: Assertion failure when using multithreading in debug mode.
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Reporter:  Maxander          |          Owner:          
    Type:  bug               |         Status:  new     
Priority:  normal            |      Component:  Compiler
 Version:  7.6.2             |       Keywords:          
      Os:  Unknown/Multiple  |   Architecture:  x86     
 Failure:  None/Unknown      |      Blockedby:          
Blocking:                    |        Related:          
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 Using the -debug compiler option in search of a (hopefully unrelated) bug,
 I've begun to receive the following error message a few seconds after
 starting my program;

 {{{

 Multi: internal error: ASSERTION FAILED: file rts/Schedule.c, line 1311

     (GHC version 7.6.2 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 Aborted
 }}}

 When I have time and if this site allows, I'll try to find what precisely
 in my code is generating the error and add that to this ticket.  Until
 then, what information I can give:

 - Running the same executable in non-threaded mode (executing with "+RTS
 N1" rather than "+RTS N2" or greater) produces no error.

 - The program calls into C using the FFI interface, and there is also a
 callback from C back into Haskell.  This would be happening around when
 the error occurs.

 - For reasons I presume to have to do with the C++ code, the program
 segfaults after extended execution; this is the hopefully unrelated bug I
 was after when I found this.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/8014>
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