#4851: NoImplicitPrelude does not handle rec / mfix / ArrowLoop properly
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Reporter: peteg | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.12.3
Resolution: | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Unknown/Multiple
Blocking: | Architecture: Unknown/Multiple
Failure: GHC rejects valid program |
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Changes (by peteg):
* status: closed => new
* resolution: invalid =>
Comment:
I expected that in a proc context "rec" should ask for ArrowLoop, not mfix
- i.e. Control.Arrow.ArrowLoop usually, and ArrowLoop with
RebindableSyntax in the HEAD / NoImplicitPrelude in 6.12.3.
Putting it another way, why are you unsurprised that mfix enters this
picture with RebindableSyntax?
Thanks for looking into this.
cheers
peter
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4851#comment:3>
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