[GHC] #13417: piResultTys1

[GHC]

#13417: piResultTys1
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           Reporter:  ralf           |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.2
           Keywords:                 |  Operating System:  Linux
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Error provoked by attached H98 program (which is generated by a program);
 compiles fine without optimizations; compilation with -O2 crashes:

 $ ghc --make -O2 FactorialSequ.lhs
 [1 of 1] Compiling FactorialSequ    ( FactorialSequ.lhs, FactorialSequ.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.0.2 for x86_64-unknown-linux):
         piResultTys1
   Sequ7 t_a2zl
   [a_a2zm]

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13417>
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