#12012: Socket operations on Windows check errno instead of calling WSAGetLastError() -------------------------------------+------------------------------------- Reporter: enolan | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Core | Version: Libraries | Keywords: | Operating System: Windows Architecture: | Type of failure: Incorrect result Unknown/Multiple | at runtime Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Winsock doesn't set errno, but it is checked in `blockingReadRawBufferPtr` and `blockingWriteRawBufferPtr` (both are in `GHC.IO.FD`). I the same thing happens in the non threaded RTS too, but that's in terms of primops and I don't understand it very well. The upshot here is that every error message originating from Winsock is wrong. Nobody noticed since any error used to just crash your program (#12010). Here's some MinGW documentation http://oldwiki.mingw.org/index.php/sockets and something from MSDN https://msdn.microsoft.com/en- us/library/windows/desktop/ms740121%28v=vs.85%29.aspx -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12012 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler