Re: 'warn' produces additional output

From: Arndt Jonasson (do-not-use_at_invalid.net)
Date: 02/25/05 

Date: 25 Feb 2005 15:39:22 +0100

Martin Kissner <news@chaos-net.de> writes:
> The following script produces a few lines of output on STDERR.
> Some of the lines are supposed to be red (works at least on zsh, bash
> and tcsh).
>
> First question:
> Why is there a trailing line after "Output line two" with a leading
> space character?
> " at ./warn.pl line 9."
> The only difference between the two warn statements is the position of
> the "\n".
>
> Second question:
> What are the general prerequisites which cause 'warn' to produce this
> additional output?

"perldoc -f warn" says:
             Produces a message on STDERR just like "die", but
             doesn't exit or throw an exception.

And "perldoc -f die" says:
             If the last element of LIST does not end in a
             newline, the current script line number and input
             line number (if any) are also printed, and a newline
             is supplied.

Does this explain what you see?

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