#7714: The type of the second argument of poll() in GHC/Event/Poll.hsc is invalid -----------------------------+---------------------------------------------- Reporter: kazu-yamamoto | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.7 | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: None/Unknown | Blockedby: Blocking: | Related: -----------------------------+---------------------------------------------- poll() is used in GHC/Event/Poll.hsc. The type of its second argument is nfds_t. nfds_t is defined unsigned long on Linux and unsigned int on Mac/FreeBSD. FFI in Poll.hsc uses CULong instead of (#type nfds_t). So, this may cause a problem on Mac/FreeBSD. Actually, a web server compiled by GHC head on FreeBSD sometime causes the following error: {{{ mighty-head: c_poll: invalid argument (Invalid argument) mighty-head: sendWakeup: invalid argument (Bad file descriptor) mighty-head: sendWakeup: invalid argument (Bad file descriptor) mighty-head: sendWakeup: invalid argument (Bad file descriptor) }}} poll() on FreeBSD returns EINVAL when the specified time limit is negative. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7714 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler