[GHC] #5742: compiler option -XDoRec crash

[GHC]

#5742: compiler option -XDoRec crash
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    Reporter:  Huenniger                   |       Owner:  simonpj           
        Type:  bug                         |      Status:  new               
    Priority:  normal                      |   Milestone:  7.6.1             
   Component:  Compiler                    |     Version:  7.2.1             
    Keywords:  frisby recusive do -XDoRec  |          Os:  Unknown/Multiple  
Architecture:  x86                         |     Failure:  Compile-time crash
  Difficulty:  Unknown                     |    Testcase:                    
   Blockedby:                              |    Blocking:                    
     Related:                              |  
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Comment(by simonpj@…):

 commit bb50135b1c35fda5289c88dbcb6ed7fb936d92c0
 {{{
 Author: Simon Peyton Jones <simonpj at microsoft.com>
 Date:   Tue Jan 17 16:40:03 2012 +0000

     Use nested tuples to desugar recursive do-notation

     Easy fix for Trac #5742.

  compiler/deSugar/DsExpr.lhs      |    8 ++++----
  compiler/typecheck/TcMatches.lhs |    2 +-
  2 files changed, 5 insertions(+), 5 deletions(-)
 }}}

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5742#comment:6>
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