Trie.remove(nonexistent-node) is a no-op

Author: minrk

lib/trie.js

@@ -75,6 +75,11 @@ URLTrie.prototype.remove = function (path) {
     }
     var part = path.shift();
     var child = this.branches[part];
+    if (child === undefined) {
+        // Requested node doesn't exist,
+        // consider it already removed.
+        return;
+
     child.remove(path);
     if (child.size === 0 && child.data === undefined) {
         // child has no branches and is not a leaf