[GHC] #4504: "awaitSignal Nothing" does not block thread with -threaded

[GHC]

#4504: "awaitSignal Nothing" does not block thread with -threaded
---------------------------------+------------------------------------------
    Reporter:  adept             |        Owner:                             
        Type:  bug               |       Status:  new                        
    Priority:  normal            |    Milestone:  7.2.1                      
   Component:  Runtime System    |      Version:  7.0.1                      
    Keywords:                    |     Testcase:                             
   Blockedby:                    |   Difficulty:                             
          Os:  Unknown/Multiple  |     Blocking:                             
Architecture:  Unknown/Multiple  |      Failure:  Incorrect result at runtime
---------------------------------+------------------------------------------
Changes (by igloo):

  * milestone:  => 7.2.1


Comment:

 Thanks for the report.

 Looks like it's seeing internal `SIGVTALRM`s.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4504#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler