#7243: regression: acceptable foreign result types
-------------------------------+--------------------------------------------
Reporter: dmwit | Owner: igloo
Type: bug | Status: new
Priority: normal | Milestone: 7.6.2
Component: Compiler (FFI) | Version: 7.6.1
Keywords: | Os: Unknown/Multiple
Architecture: x86_64 (amd64) | Failure: GHC rejects valid program
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Changes (by igloo):
* owner: => igloo
* difficulty: => Unknown
* component: Compiler => Compiler (FFI)
* milestone: => 7.6.2
Comment:
The problem is:
{{{
Dynamic wrapper.
The type of a wrapper stub has to be of the form ft -> IO (FunPtr ft),
where ft may be any foreign type.
}}}
e.g. this is accepted:
{{{
import Foreign.Ptr
foreign import ccall "wrapper" foo :: () -> IO (FunPtr ())
}}}
I'll leave the ticket open, though, as I think we should give the expected
pattern in the error message.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7243#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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