[Haskell] rawSystem unpredictable with signals

[Udo Stenzel]

John Goerzen wrote:
> When I hit Ctrl-C while the child process is running, sometimes:
> 
>   1) rawSystem returns ExitSuccess
> 
> or
> 
>   2) rawSystem raises an IOError saying the child terminated with a
>   signal
> 
> I am totally at a loss as to explain this difference in behavior.  I
> would prefer it to choose option #2 always.

Could process #1 have caught SIGINT while process #2 didn't?  If so, GHC
is not at fault, because wait() doesn't tell about caught signals.


Udo.
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