Fix bug in extracting empty tree.

akorotkov · akorotkov · commit aa36e6f347d6 · 2014-05-18T17:18:18.000+04:00
diff --git a/jsquery_extract.c b/jsquery_extract.c
@@ -574,9 +574,12 @@ extractJsQuery(JsQuery *jq, MakeEntryHandler handler, Pointer extra)
 	ExtractedNode *root;
 
 	root = recursiveExtract(VARDATA(jq), 0, false, NULL);
-	flatternTree(root);
-	simplifyRecursive(root);
-	root = makeEntries(root, handler, extra);
+	if (root)
+	{
+		flatternTree(root);
+		simplifyRecursive(root);
+		root = makeEntries(root, handler, extra);
+	}
 	return root;
 }
 
