GHC-6.9 panics rather than parse error, related to view patterns.

Try to compile the below program, ghc panics rather than giving a parse error (in the program I was trying to write, wrapper's argument should be a lambda function).

main = do

wrapper (_ -> putStrLn "_")

wrapper :: (String -> IO ()) -> IO () wrapper f = f ""

Output:

[1 of 1] Compiling Main ( Test.hs, interpreted ) : panic! (the 'impossible' happened)

(GHC version 6.9.20071111 for i386-unknown-mingw32):

rnExpr: unexpected expression: panic! (the 'impossible' happened)

(GHC version 6.9.20071111 for i386-unknown-mingw32):

hsSyn/HsExpr.lhs:(320,0)-(467,72): Non-exhaustive patterns in functi

pr_expr

Trac metadata

Trac field	Value
Version	6.9
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Windows
Architecture	x86