Video showing steps to reproduce the issue
WarningAboutNPE.webm (video/webm), 16.20 MB, created by Jan Hrcek on 2014-02-10 08:54:27 UTC
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Creator: Jan Hrcek
Created: 2014-02-10 08:54:27 UTC
Size: 16.20 MB

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Attachments on bug 1063184: 861278 | 861279