<p>It may happen (and happens on OS X) that plugin activation using<br>
plugin_new() triggers some action which causes the tree view to<br>
update. However, as the old plugin was freed before, the tree view<br>
contains an invalid pointer to p which causes invalid memory access.</p>

<p>After freeing the old pointer, set the tree view value to NULL - the<br>
plugin pointer is checked at other places for NULL value so it<br>
doesn't crash.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/geany/geany/pull/732'>https://github.com/geany/geany/pull/732</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Avoid possible invalid memory access when activating plugin</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/geany/geany/pull/732/files#diff-0">src/plugins.c</a>
    (3)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/geany/geany/pull/732.patch'>https://github.com/geany/geany/pull/732.patch</a></li>
  <li><a href='https://github.com/geany/geany/pull/732.diff'>https://github.com/geany/geany/pull/732.diff</a></li>
</ul>

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