[GHC] #4939: Panic in parsing a stmt

[GHC]

#4939: Panic in parsing a stmt
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    Reporter:  simonpj           |        Owner:              
        Type:  bug               |       Status:  new         
    Priority:  normal            |    Milestone:              
   Component:  Compiler          |      Version:  7.0.1       
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Comment(by simonmar):

 You need to use a proper `SrcLoc` when calling `parseStmt`.  e.g. the one
 used by `GHC.runStmt` is `mkSrcLoc (fsLit "<interactive>") 1 1`.

 The panic isn't a bug in this case, because the test code is invoking GHC
 internals (`Lexer` and `Parser`).  If you'd like us to expose more via the
 GHC API, please make a feature request.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4939#comment:1>
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