[Haskell-cafe] Re: GHC throws IOError on Win32 when there is no console

John Ky newhoggy at gmail.com
Fri Feb 9 17:36:17 EST 2007

Sorry, I should clarify.  I am writing about applications compiled with GHC.


On 2/10/07, John Ky <newhoggy at gmail.com> wrote:
> Hi,
> I noticed on Windows that when I use IO functions that write to stdout
> when the process is lacking a console, those functions throw an IOError.
> I'm not sure if this also occurs for stderr because I haven't tried it.
> Some classes of processes are created without a console because they never
> interact with the user and include System services.  Crashing with IOError
> in this case is difficult to diagnose because because the only symptom is
> the process crashes with no visible output.
> I believe the most sensible behaviour should be for those functions to not
> throw, but instead do nothing.
> -John
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