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Glasgow Haskell Compiler
GHC
Commits
69c82de7
Commit
69c82de7
authored
Jun 26, 2006
by
simonpj
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Accept output change
parent
994a9db6
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testsuite/tests/ghc-regress/deriving/should_fail/drvfail003.stderr
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69c82de7
drvfail003.hs:13:5:
No instance for (Show (v (v a)))
arising from the 'deriving' clause of a data type declaration at drvfail003.hs:13:5
Possible fix: add an instance declaration for (Show (v (v a)))
When deriving the `Show' instance for type `Square_'
Variable occurs more often in a constraint than in the instance head
in the constraint: Show (v (v a))
(Use -fallow-undecidable-instances to permit this)
In the derived instance
instance (Show (v (v a))) => Show (Square_ v w a)
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