RE: capturing output from running process crashes gtk2

["Ratcliffe, Jeffrey (Peters)" <Jeffrey Ratcliffe External eads com>]

> Use lexical filehandles (instead of oldstyle global ones), like so:
>
>   my ($write, $read, $error);
>   my $pid = open3($write, $read , $error, "./test_scan" );
>   ...
>   Glib::IO->add_watch(fileno($error), 'in', sub {
>   ...
>                               sysread $error, $line, 1024;

I get then:

Can't use an undefined value as a symbol reference at ./test_dialog3 line 48.

line 48 being the end of the add_watch sub.

> As for the problem with the real scanimage program mentioned by zentara:

Thanks for the tips. Noted!

Jeff