[Haskell-cafe] Preventing leaked open file descriptors when catching exceptions

[Bryan O'Sullivan]

On Tue, Feb 21, 2012 at 8:16 AM, Ryan Newton <rrnewton at gmail.com> wrote:

> FYI, lsof confirms that there are indeed many many open connections to the
> same FIFO:
>

Like all of the lowest-level I/O functions, openFD just gives you back an
integer, and the Fd type has no notion that there's an underlying system
resource associated with it. It's your responsibility to manage it (i.e.
clean up manually when catching an exception).
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