So, since the 'code sub-pattern' won't work ( see ikegami's++ above ) in the way you've attempted (and ++ for taking the challenging route), you may wish to reconsider your approach to the climb.

If so, the following -- hidden in the readmore so as not to spoil the challenge you still face -- will work. Note, however, that I have assumed that the list of data returned by

bash-3.1$ weather --weather Newcastle
009:    Newcastle Light Rain Late Light Rain Late. Morning Clouds. War
+m.

[download]

represents a specific label ("Newcastle) followed by a set of possible alternatives

So, without further ado:

#!/usr/bin/perl
use warnings;
use strict;
# 813676

my ($weather, @weather);

while ( <DATA> ) {
    if ( /(Newcastle[\w\s\.]+.*)/ ){
        if ( $1 ) {
            $weather = $1;
            chomp($weather);
            push @weather,$weather;
        } else {
            print "No Match in $_\n";
        }
    } else {
        print "\n\tNo data for Newcastle in current element: $_\n";
        # next;
    }
}

for $weather(@weather) {
    print $weather . "\n";
}


__DATA__
Newcastle Light Rain Late Light Rain Late. Morning Clouds. Warm.
Trent Flurries. Low -4 - -2 C.
Newcastle1 Light Rain
Newcastle2 Light Rain Late.
Newcastle3 Morning Clouds. Warm. High 13-17C.
Newcastle4 Occasional Brimstone flurries. Possible Earthquakes. Pleasa
+nt. 12 - 17 C.

[download]
Output: 
        No data for Newcastle in current element: Trent Flurries. Low 
+-4 - -2 C.

Newcastle Light Rain Late Light Rain Late. Morning Clouds. Warm.
Newcastle1 Light Rain
Newcastle2 Light Rain Late.
Newcastle3 Morning Clouds. Warm. High 13-17C.
Newcastle4 Occasional Brimstone flurries. Possible Earthquakes. Pleasa
+nt. 12 - 17 C.

[download]

In reply to Re: Code Sub-Pattern Error "Panic: top_env" by ww
in thread Code Sub-Pattern Error "Panic: top_env" by urthwrm

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