events: fix TypeError in removeAllListeners

Check that `listeners` is actually an array before trying to manipulate it
because it won't be if no regular event listeners have been registered yet
but there are 'removeListener' event listeners.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/events.js b/lib/events.js
index f43df093d..781748ba8 100644
--- a/lib/events.js
+++ b/lib/events.js
@@ -263,7 +263,7 @@ EventEmitter.prototype.removeAllListeners = function(type) {
 
   if (typeof listeners === 'function') {
     this.removeListener(type, listeners);
-  } else {
+  } else if (Array.isArray(listeners)) {
     // LIFO order
     while (listeners.length)
       this.removeListener(type, listeners[listeners.length - 1]);