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removeListener() may be called on an undefined object #166

Closed IstvanD closed 3 years ago

IstvanD commented 3 years ago

Calling removeListener() may lead to an exception because the me object can be null/undefined. https://github.com/ckeditor/ckeditor4/blob/major/core/event.js#L167

This may lead to issues like LPS-131699.

See PTR-2398 for more info and explanation.

A null check should be applied.

julien commented 3 years ago

Fixed by #168