Seems to be version dependent: 
#!/usr/bin/perl

use strict;
use warnings;
no warnings qw /syntax/;

my $program = 'open STDERRIN, "<&STDERR" or die $!;
               my $line = <STDERRIN>;  print "YAY!!! $line";';

foreach my $version (qw /5.005 5.6.0 5.6.1 5.8.0 5.8.1/) {
    print "Version $version\n";
    system "/opt/perl/$version/bin/perl -we '$program'"; 
}
 
__END__
Version 5.005
foo
YAY!!! foo
Version 5.6.0
bar
YAY!!! bar
Version 5.6.1
Filehandle STDERRIN opened only for output at -e line 2.
baz
YAY!!! baz
Version 5.8.0
Filehandle STDERRIN opened only for output at -e line 2.
Use of uninitialized value in concatenation (.) or string at -e line 2
+.
YAY!!! Version 5.8.1
Filehandle STDERRIN opened only for output at -e line 2.
Use of uninitialized value in concatenation (.) or string at -e line 2
+.
YAY!!!

[download]

It runs on 5.005, 5.6.0 and 5.6.1, although it gives a warning under 5.6.1. It won't read from STDERRIN in 5.8.0 or 5.8.1.

Abigail

In reply to Re: STDIN schizofrenia by Abigail-II
in thread STDIN schizofrenia by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.