Question about cancelling sub-routine

[Mike Martin <redtux1 gmail com>]

This works

if ($append == 1){

die (main::encode_loop) if $count == 100; # this is a count as a test
- the loop goes from 1-150
}

but if I try to put it as the action for a cancel sub it fails silently


$widget{btn_cancel}->signal_connect('clicked', sub {

die (main::encode_loop)

        );

any suggestions