#14125: Bogus unacceptable type in foreign declaration. -------------------------------------+------------------------------------- Reporter: winter | Owner: (none) Type: bug | Status: patch Priority: high | Milestone: 8.2.2 Component: Compiler (FFI) | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3865 Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Indeed, I already have a test case for `IOErrno UnixReturn` in the Diff posted earlier (whether it's an argument type or result type isn't of much consequence, as they're normalized the same). To be clear, I was inquiring about this code from your original post. {{{#!hs foreign import CALLCONV unsafe "HsNet.h recv" c_recv :: CInt -> Ptr Word8 -> CSize -> CInt -> IO (UnixReturn CSsize) }}} I am unable to get this code to emit a `Unacceptable result type in foreign declaration` warning on GHC 8.2 like you claimed. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14125#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler