Foreign export requires redundant type signature
With a source file such as:
module FFITest where
foreign export ccall "function"
function :: IO ()
function :: IO ()
function = putStrLn "Hello, world!"The second function :: IO () signature is required to satisfy -fwarn-missing-signatures, even though a signature is already present in the foreign export declaration, and the types are required to be the same.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.6.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |