<p>See <a href="https://github.com/geany/geany/pull/1272#issuecomment-255576509" class="issue-link js-issue-link" data-url="https://github.com/geany/geany/issues/1272" data-id="184629839" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#1272 (comment)</a></p>

<p><a href="https://github.com/codebrainz" class="user-mention">@codebrainz</a> actually your proposed fix is almost correct, but the <code>GTK_IS_WIDGET()</code> part is unnecessary -- and suggests it might be something else.  The problem is simply that the scrollbars will be <code>NULL</code> if <code>Dispose()</code> has already run, which will happen if destroying a still displayed widget (I think it's as easy as that, but I didn't triple check).</p>

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