[GHC] #9208: panic - attempt to prod-split strictness call demand C(S(C(C(S(LS)))))

[GHC]

#9208: panic - attempt to prod-split strictness call demand C(S(C(C(S(LS)))))
-------------------------------------------------+-------------------------
        Reporter:  luite                         |            Owner:
            Type:  bug                           |           Status:  merge
        Priority:  normal                        |        Milestone:
       Component:  Compiler                      |          Version:  7.8.2
      Resolution:                                |         Keywords:
Operating System:  Unknown/Multiple              |     Architecture:
 Type of failure:  None/Unknown                  |  Unknown/Multiple
       Test Case:  stranal/should_compile/T9208  |       Difficulty:
        Blocking:                                |  Unknown
                                                 |       Blocked By:
                                                 |  Related Tickets:
-------------------------------------------------+-------------------------

Comment (by nomeata):

 There is something wrong with the test case. With `-DDEBUG`, I get
 {{{
 Compile failed (status 256) errors were:
 ghc-stage2: panic! (the 'impossible' happened)
   (GHC version 7.9.20140622 for x86_64-unknown-linux):
         ASSERT failed! file compiler/codeGen/StgCmmExpr.hs, line 643

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug


 *** unexpected failure for T9208(optasm)
 }}}
 (full log at https://s3.amazonaws.com/archive.travis-
 ci.org/jobs/28166586/log.txt)
 while it worked without `-DDEBUG`.

 (Didn’t look into it deeper. Greetings from OPLSS! :-))

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9208#comment:6>
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