The type of the second argument of poll() in GHC/Event/Poll.hsc is invalid
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.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.7 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |