Visiting a non-existent page with a too long name displays a technical error

Reproduction steps

1. go to https://xwiki8080.home/xwiki/bin/view/Zompany%20Presentation%20Events/Presentation%20from%2010%20december%202015%20at%20the%20Fourth%20edition%20of%20the%20International%20Conference%20for%20the%20Environmental%20Responsibility%20(ICER%202015)/Intervention%20from%20the%20President%20of%20the%20Interdisciplinary%20Commission%20for%20Responsible%20Development%20of%20Alternative%20Fuels%20(ICRDA)/Lorem%20ipsum%20dolor%20sit%20amet%2C%20consectetur%20adipiscing%20elit.%20Suspendisse%20nisi%20nibh%2C%20vulputate%20vel%20justo%20e/Quisque%20a%20velit%20dapibus%2C%20porttitor%20eros%20nec%2C%20consectetur%20diam.%20Vestibulum%20cursus%20condimentum%20mi%20et%20malesuada/Cras%20a%20accumsan%20risus%2C%20quis%20facilisis%20tortor.%20Cras%20massa%20elit%2C%20euismod%20sit%20amet%20egestas%20vitae%2C%20fringilla%20auctor%20massa/Nulla%20gravida%20metus%20at%20volutpat%20fringilla.%20Aliquam%20commodo%20sem%20et%20nibh%20mattis%20molestie.%20Integer%20posuere%20vehicula%20diam,%20quis%20imperdiet%20nibh%20placerat%20in.%20Pellentesque%20habitant%20morbi%20tristique%20senectus%20et%20netus%20et%20malesuada%20fames%20ac%20turpis%20egestas
2. observe the error message

Expected

A message explains clearly that the error is caused by the too long page name.

For instance, this is what you get when using the page creation UI

Actual

An technical error is presented to the user