[GHC] #12383: ghc: internal error: TSO object entered

[GHC]

#12383: ghc: internal error: TSO object entered
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           Reporter:  aufheben       |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  7.10.3
           Keywords:                 |  Operating System:  Linux
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  crash
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 I just ran into this build failure for the first time:

 {{{
 ghc: internal error: TSO object entered!
     (GHC version 7.10.3 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 }}}

 I'm not sure how to reproduce this bug or obtain more debugging
 information but this is how it happened: I was working with Yesod and
 trying to edit a .hamlet template file. When the file was saved Yesod
 tried to recompile the project and the build failed with that output.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12383>
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