A bug in Qt version of diff-match-patch causes application to crash with SIGABRT

[Google Code Exporter]

If diff_main(text1, text2) is used while text1 is empty QString, an application 
crashes with SIGABRT.

Original issue reported on code.google.com by [e-mail] on 2 Feb 2013 at 3:49

[Google Code Exporter]

Checked on Fedora 18 with Qt 4.8.2

Original comment by [e-mail] on 2 Feb 2013 at 3:53

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