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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: args-out-of-range for 'call-process-region'.
Date: Mon, 26 Sep 2011 22:03:50 +0300
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> From: Oleksandr Gavenko <gavenkoa@gmail.com>
> Date: Mon, 26 Sep 2011 20:26:43 +0300
> 
> I try eval:
> 
>    (call-process-region 1 6 "cat" nil t)
> 
> and get
> 
>    (args-out-of-range 0 5)
>    call-process-region(0 5 "cat" nil t)

This works for me as expected.  I cannot see how could it happen that
you specified positions 1 to 6 as the region and got an error about 0
to 5.

> Also I get same error with such code:
> 
>    (with-temp-buffer
>     (insert "hello")
>     (message "ret: %d" (call-process-region 0 (point-max) "cat" nil t))
>     (message (buffer-string)))
> 
> What is wrong?

Buffer positions start from 1, so using zero will definitely and
correctly signal an error.