#7512: GHC crashes with multiple => in instance
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Reporter: jvictor | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.6.1 | Keywords:
Os: Linux | Architecture: x86_64 (amd64)
Failure: Compile-time crash | Blockedby:
Blocking: | Related:
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GHC will crash (rather than a syntax error) if you write
{{{
import Data.Array.Unboxed
newtype Vector r = Vector (UArray Int r)
instance (IArray UArray r) => (Num r) => Num (Vector r) where
(Vector v1) + (Vector v2) = Vector $ listArray (0,0) []
}}}
This is unfortunately the smallest program I found that crashes the
compiler; removing the definition of (+) yields a syntax error as
expected.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7512>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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