#4527: <<loop>> ing program with ghc-7.0.1
---------------------------------+------------------------------------------
    Reporter:  maeder            |       Owner:                             
        Type:  bug               |      Status:  new                        
    Priority:  normal            |   Component:  Compiler                   
     Version:  7.0.1             |    Keywords:                             
    Testcase:                    |   Blockedby:                             
          Os:  Unknown/Multiple  |    Blocking:                             
Architecture:  Unknown/Multiple  |     Failure:  Incorrect result at runtime
---------------------------------+------------------------------------------
 I've got a (unfortunately large) program that terminates with <<loop>> if
 compiled with ghc-7.0.1 but works as expected with ghc-6.12.3 (and
 ghc-6.10.4).

 In order to reproduce this, install the two cabal packages
 programatica-1.0.0.1 and hana-0.97 (not on hackage)

 http://www.informatik.uni-
 bremen.de/agbkb/forschung/formal_methods/CoFI/hets/src-
 distribution/versions/programatica-1.0.0.1.tar.gz

 http://www.informatik.uni-
 bremen.de/agbkb/forschung/formal_methods/CoFI/hets/src-
 distribution/versions/Hana-0.97.tar.gz

 (I'll try to attach this archives.)

 Apply the installed program "hana" to the file "Dummy.hs" inside the
 hana-0.97 package.

 The expected output is:
 {{{
 {-

 scope:

 -}
 module Dummy where
 }}}

 The output produced by hana created by ghc-7.0.1 is
 {{{
 hana: <<loop>>
 }}}

 Some tracing indicated that something goes wrong in the programatica
 module ScopeModule.

 The original problem is reported here:
 http://trac.informatik.uni-bremen.de:8080/hets/ticket/884

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4527>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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