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  • Glasgow Haskell Compiler
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  • #3484
Closed
Open
Created Sep 03, 2009 by ryani@trac-ryani

GHC diverges when proving nonequality of types

Conor posted an interesting suggestion for proving type non-equality here:

http://www.nabble.com/Re%3A-Is-it-possible-to-prove-type-\*non\*-equality-in-Haskell--p25153135.html

I implemented it on my Nat framework and got GHC to diverge:

C:\haskell>ghc -c Absurd.hs
stack overflow: use +RTS -K<size> to increase it

I've attempted to shrink the code as much as possible and still reproduce the error; attached is the result.

Trac metadata
Trac field Value
Version 6.10.4
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
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