ghc.exe: panic! (the 'impossible' happened)
When compiling an example from Real World Haskell, I get the following error message:
Prelude> :l Prettify.hs
[2 of 2] Compiling Prettify ( Prettify.hs, interpreted )
ghc.exe: panic! (the 'impossible' happened)
(GHC version 7.4.2 for i386-unknown-mingw32):
nameModule show{tv apB}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
>
The example contains simple function stubs which are used by another module:
module Prettify
( string
, text
, double
) where
import SimpleJSON
data Doc = ToBeDefined
deriving (show)
string :: String -> Doc
string str = undefined
text :: String -> Doc
text str = undefined
double :: Double -> Doc
double num = undefined
Trac metadata
Trac field | Value |
---|---|
Version | 7.4.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |