On Ubuntu 14.04, Geany 1.27 the HTML Pair Tag Highlighter can cause Geany to terminate when deleteing the element type in an unmatched pair. For example:
<p id="a">
The delete the "p" and Geany dies. The tag must have at least one character in addition to the element type. e.g. just deleting
from below is okay:
<p>
but deleting "div" from below, which has an extra spave after "div" kill Geany:
</div >
Fixed in GIT master.
See https://github.com/geany/geany-plugins/issues/442 for details.