I think you need to give the function a name first (with add_defun()), and then use that name in the bind_key() call 

...
$term->add_defun('insert-text', \&insertxt);
$term->bind_key(61, 'insert-text');
...

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In reply to Re: using Term::ReadLine::Gnu by almut
in thread using Term::ReadLine::Gnu by my_nihilist

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