FFI Bug - Finalizer always called with NULL pointer?
simonmarhaskell at gmail.com
Mon Apr 10 05:54:34 EDT 2006
Brian Hulley wrote:
> By just using the following syntax, GHC compiles everything correctly:
> foreign import ccall
> "&duma_releaseFont" -- absolutely vital for FunPtr functions
> :: FunPtr (Ptr RawFont -> IO ())
Yes, you're not the first person to trip over this one. I've done it
myself, and it caused much head-scratching.
I think we should probably emit a warning in this case - it's much more
likely that you meant to import "&foo" as a FunPtr, than just "foo".
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