<ul>
<li>Check for NULL pointer before calling subst_expr_free
to prevent NULL pointer dereference when there is an
unknown subtype error.</li>
</ul>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/kamailio/kamailio/pull/337'>https://github.com/kamailio/kamailio/pull/337</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>textops: prevent null dereference on tr_txt_eval_re error</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/337/files#diff-0">modules/textops/txt_var.c</a>
    (2)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/kamailio/kamailio/pull/337.patch'>https://github.com/kamailio/kamailio/pull/337.patch</a></li>
  <li><a href='https://github.com/kamailio/kamailio/pull/337.diff'>https://github.com/kamailio/kamailio/pull/337.diff</a></li>
</ul>

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