#4811: Internal error: throwTo: unrecognised why_blocked value
-------------------------------+--------------------------------------------
    Reporter:  mitar           |        Owner:              
        Type:  bug             |       Status:  new         
    Priority:  normal          |    Milestone:              
   Component:  Compiler        |      Version:  7.1         
    Keywords:                  |     Testcase:              
   Blockedby:                  |   Difficulty:              
          Os:  Linux           |     Blocking:              
Architecture:  x86_64 (amd64)  |      Failure:  None/Unknown
-------------------------------+--------------------------------------------

Comment(by mitar):

 OK. It took me half of a day but I managed to reduce this. I managed to
 remove all special dependencies and I use only
 [http://hackage.haskell.org/package/Etage Etage] now.

 It seems the problem is connected with that I fork two threads which I
 force to be on the same OS thread (with `forkOnIO`) and then run with
 `-N2` parameter. I am attaching a program.

 I tested it on Mac OS X too and the same thing happens.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4811#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler

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