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Simon Marlow authored
From the entry in the User's guide: -fwarn-dodgy-foreign-imports causes a warning to be emitted for foreign imports of the following form: foreign import "f" f :: FunPtr t on the grounds that it probably should be foreign import "&f" f :: FunPtr t The first form declares that `f` is a (pure) C function that takes no arguments and returns a pointer to a C function with type `t`, whereas the second form declares that `f` itself is a C function with type `t`. The first declaration is usually a mistake, and one that is hard to debug because it results in a crash, hence this warning.
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