[GHC] #2786: Blackhole loops are not detected and reported in GHCi

[GHC]

#2786: Blackhole loops are not detected and reported in GHCi
---------------------------------+------------------------------------------
    Reporter:  simonmar          |        Owner:              
        Type:  bug               |       Status:  new         
    Priority:  normal            |    Milestone:  _|_         
   Component:  GHCi              |      Version:  6.8.3       
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:  Unknown     
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
---------------------------------+------------------------------------------
Changes (by simonmar):

  * failure:  => None/Unknown


Comment:

 This also means that Template Haskell computations don't catch black
 holes: #4324

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2786#comment:1>
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