Re: Guarantees regarding finalizers

The docs are rather backward.  Foreign.ForeignPtr finalizers are guaranteed to run, Foreign.Concurrent finalizers are not.  I'll fix the docs, thanks for the report.

Thanks for the reply. Unfortunately, I'm running into the following error message when trying to use a Foreign.ForeignPtr finalizer: "foo: error: a C finalizer called back into Haskell. This was previously allowed, but is disallowed in GHC 6.10.2 and later. To create finalizers that may call back into Haskll, use Foreign.Concurrent.newForeignPtr instead of Foreign.newForeignPtr." Is there a technical reason why the Foreign.Concurrent finalizers aren't guaranteed to run? Best regards, -- Mietek Bąk