Re: Capturing errors from 3-arg pipe open in ActivePerl 5.020

Can't solve your problem, but for what it's worth it does fail properly on my OS X system. Interestingly though, if I call it like you did with an argument to the non-existent program, *that* error is raised first:

[502]&#9658; perl -E'
open ( FOO, "-|", "caesar" ) or die $!;
'
No such file or directory at -e line 2.

[503]&#9658; perl -E'
open ( FOO, "-|", "caesar <article" ) or die $!;
'
sh: article: No such file or directory
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The way forward always starts with a minimal test.

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Re^2: Capturing errors from 3-arg pipe open in ActivePerl 5.020 by ateague (Monk) on Nov 16, 2015 at 17:38 UTC
I got similar results: The shell throws an error, but it never makes it to Perl Pipe.pl `#!/usr/bin/perl use 5.018; use strict; use warnings; open (my $ARTICLE, "-\|", "caesar") or die "Can't start caesar: $!\n$^E +"; my $read = <$ARTICLE>; say "[$read]";` [download] Result: `perl pipe.pl 'caesar' is not recognized as an internal or external command, operable program or batch file. Use of uninitialized value $read in concatenation (.) or string at pip +e.pl line 9. []` [download]	[reply] [d/l] [select]

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Re^2: Capturing errors from 3-arg pipe open in ActivePerl 5.020
by ateague (Monk) on Nov 16, 2015 at 17:38 UTC

I got similar results: The shell throws an error, but it never makes it to Perl

Pipe.pl

#!/usr/bin/perl
use 5.018;
use strict;
use warnings;

open (my $ARTICLE, "-|", "caesar") or die "Can't start caesar: $!\n$^E
+";

my $read = <$ARTICLE>;
say "[$read]";
[download]

Result:

perl pipe.pl
'caesar' is not recognized as an internal or external command,
operable program or batch file.
Use of uninitialized value $read in concatenation (.) or string at pip
+e.pl line 9.
[]
[download]

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