Clear handler cache on a new connection

Author: xPaw

src/client.js

@@ -110,6 +110,8 @@ module.exports = class IrcClient extends EventEmitter {
             // This prevents stale state if a connection gets closed during CAP negotiation
             client.network.cap.negotiating = false;
             client.network.cap.requested = [];
+
+            client.command_handler.resetCache();
         });
 
         // IRC command routing

src/commands/handler.js

@@ -22,6 +22,8 @@ module.exports = class IrcCommandHandler extends EventEmitter {
 
         this.request_extra_caps = [];
 
+        this.resetCache();
+
         require('./handlers/registration')(this);
         require('./handlers/channel')(this);
         require('./handlers/user')(this);
@@ -162,10 +164,7 @@ module.exports = class IrcCommandHandler extends EventEmitter {
      * cache.destroy();
      */
     cache(id) {
-        var cache;
-
-        this._caches = this._caches || Object.create(null);
-        cache = this._caches[id];
+        let cache = this._caches[id];
 
         if (!cache) {
             let destroyCacheFn = (cache, id) => {
@@ -189,4 +188,8 @@ module.exports = class IrcCommandHandler extends EventEmitter {
     hasCache(id) {
         return this._caches && Object.prototype.hasOwnProperty.call(this._caches, id);
     }
+
+    resetCache() {
+        this._caches = Object.create(null);
+    }
 };