[ ghc-Bugs-935017 ] double arrows causes a panic

Bugs item #935017, was opened at 2004-04-14 08:44
Message generated for change (Comment added) made by nobody
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Category: Compiler
Group: 6.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: double arrows causes a panic

Initial Comment:
Trying to load code like the following:

test = proc inp -> show -< id -< inp

will cause both ghc and ghci to panic with this message:

ghc-6.2: panic! (the `impossible' happened, GHC version
6.2):
        tcMonoExpr GHCziBase.id {- v r8k -} -< inp {- v
aPp -}

As far as I can tell, it's the "a -< b -< c" that's
causing problems.

- abe.egnor@xxxxxxxxx

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Comment By: Nobody/Anonymous (nobody)
Date: 2004-04-20 04:48

Message:
Logged In: NO 

This is the same bug as

http://www.haskell.org//pipermail/glasgow-haskell-bugs/2004-March/003944.html

I believe the fix is included in 6.2.1.

-- Ross Paterson

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