[VE][79] Error Message Feedback

 
Validating http://hemmo.ahrn.nl/indeks.php
Error [79]: "end tag for element X which is not open"

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Currently, the Validator errors when line contents are too long, but in this case it is required for the (java)script i am using. 
Is this invalid html or is it a bug in the validator?
 
Hemmo de Vries