From bitcard.org@bernhardwagner.net

The error is reported with the wrong line number (10 instead of 8). This error comes from a longer example, where the error was reported on the last line within the while-block.

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

my @​arr = (1, undef);

my $i = 0;
while( $arr[$i] > 0 ) {
  print $i, $/;
  $i++; # line 10
}

# Causes error​:
# Use of uninitialized value $arr[1] in numeric gt (>) at ./while2.pl line 10.
# However, I'd expect this error to be indicated with line 8, not 10.
#
# error reproduced for perls​:
# v5.18.2 on Ubuntu 14.04.4
# 5.23.9 on OSX 10.11.6 (El Capitan)
# 5.23.7 on OSX 10.11.6 (El Capitan)
# 5.16.3 on OSX 10.11.6 (El Capitan)
# 5.25.4 on OSX 10.11.6 (El Capitan)

From @jkeenan

On Mon Sep 05 07​:30​:12 2016, bitcard.org@​bernhardwagner.net wrote​:

The error is reported with the wrong line number (10 instead of 8).
This error comes from a longer example, where the error was reported
on the last line within the while-block.

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

my @​arr = (1, undef);

my $i = 0;
while( $arr[$i] > 0 ) {
print $i, $/;
$i++; # line 10
}

# Causes error​:
# Use of uninitialized value $arr[1] in numeric gt (>) at ./while2.pl
line 10.
# However, I'd expect this error to be indicated with line 8, not 10.
#

This is probably not easily fixable. See, e.g., discussion of a similar issue in Porting/todo.pod in the section headed "eliminate incorrect line numbers in warnings".

# error reproduced for perls​:
# v5.18.2 on Ubuntu 14.04.4
# 5.23.9 on OSX 10.11.6 (El Capitan)
# 5.23.7 on OSX 10.11.6 (El Capitan)
# 5.16.3 on OSX 10.11.6 (El Capitan)
# 5.25.4 on OSX 10.11.6 (El Capitan)

--
James E Keenan (jkeenan@​cpan.org)

The RT System itself - Status changed from 'new' to 'open'