Changes between Initial Version and Version 5 of Ticket #3822


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Timestamp:
Feb 14, 2010 5:55:57 PM (5 years ago)
Author:
igloo
Comment:

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  • Ticket #3822

    • Property Summary changed from pattern guards in arrow notation (Arrows extension) case statement cause compiler panic to guards in arrow notation (Arrows extension) case statement cause compiler panic
    • Property Keywords pattern removed
    • Property Architecture changed from x86_64 (amd64) to Unknown/Multiple
    • Property Owner set to ross
    • Property Operating System changed from Linux to Unknown/Multiple
  • Ticket #3822 – Description

    initial v5  
    11The attached test case causes this panic message:
    22
    3 -----
     3{{{
    44ghc: panic! (the 'impossible' happened)
    55  (GHC version 6.12.1 for x86_64-unknown-linux):
     
    77
    88Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
    9 -----
     9}}}
    1010
    1111The offending line is the one with '| neg'.  It doesn't panic if you use the commented out line below it instead.