#14530: hWaitForInput causes the program to abort on Windows -----------------------------------+-------------------------------------- Reporter: dnadales | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Core Libraries | Version: 8.0.2 Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -----------------------------------+-------------------------------------- Description changed by dnadales: Old description:

When running the following program on Windows (10):

{{{#!hs readWithinNSecs :: IO () readWithinNSecs = withSocketsDo $ do h <- connectTo "localhost" (PortNumber 9090) hSetBuffering h NoBuffering readerTid <- forkIO $ politeReader h threadDelay (2 * 10^6) killThread readerTid

where politeReader h = do info <- hShow h putStrLn info line <- ifM (hWaitForInput h (10^6)) (hGetLine h) (return "Nothing!") putStrLn $ "Got " ++ line }}}

The program aborts with the following error:

{{{#!text {loc=,type=duplex (read-write),buffering=none} fdReady: fd is too big This application has requested the Runtime to terminate it in an unusual way. }}}

New description: When running the "server" and "client" progams shown below, the client aborts, on Windows (10), with the following error: {{{#!text {loc=,type=duplex (read-write),buffering=none} fdReady: fd is too big This application has requested the Runtime to terminate it in an unusual way. }}} Here is the code for the client: {{{#!hs import Network import Control.Concurrent import System.IO main = readWithinNSecs readWithinNSecs :: IO () readWithinNSecs = withSocketsDo $ do h <- connectTo "localhost" (PortNumber 9090) hSetBuffering h NoBuffering readerTid <- forkIO $ politeReader h threadDelay (2 * 10^6) killThread readerTid where politeReader h = do info <- hShow h putStrLn info gotSth <- hWaitForInput h (10^6) if gotSth then do line <- hGetLine h putStrLn $ "Got " ++ line else return () }}} And here the code for the server: {{{#!hs module Main where import Network.Socket import Control.Concurrent main :: IO () main = do sock <- socket AF_INET Stream 0 -- create socket setSocketOption sock ReuseAddr 1 -- make socket immediately reusable - eases debugging. bind sock (SockAddrInet 9090 iNADDR_ANY) -- listen on TCP port 4242. listen sock 2 -- set a max of 2 queued connections mainLoop sock mainLoop :: Socket -> IO () mainLoop sock = do conn <- accept sock -- accept a connection and handle it runConn conn -- run our server's logic mainLoop sock -- repeat runConn :: (Socket, SockAddr) -> IO () runConn (sock, _) = do threadDelay (2 * 10^6) send sock "Hello!\n" close sock }}} -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14530#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#14530: hWaitForInput causes the program to abort on Windows -----------------------------------+-------------------------------------- Reporter: dnadales | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Core Libraries | Version: 8.0.2 Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -----------------------------------+-------------------------------------- Comment (by Phyx-): Oops, sorry, didn't notice the reply. I'll make sure to test this scenario with the new IO manager and network lib. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14530#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#14530: hWaitForInput causes the program to abort on Windows -----------------------------------+-------------------------------------- Reporter: dnadales | Owner: Phyx- Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Core Libraries | Version: 8.0.2 Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 (amd64) Type of failure: Runtime crash | Test Case: Blocked By: 11394 | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -----------------------------------+-------------------------------------- Changes (by Phyx-): * owner: (none) => Phyx- * blockedby: => 11394 * milestone: => 8.8.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14530#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler