selecting text displays the selected text in the status bar, which can insanely increase the window width
When I select text in a PDF document, the whole selected text is displayed in the status bar, and the zathura window width is increased to make this text completely visible in the status bar. If much text is selected (several lines / paragraphs), this can give insane window widths (several times larger than the screen width), such as 30521 pixels, making the X server quite unresponsive.
I also reported this issue as Debian bug 1060314.