From c215069c005e7253b5ca42352fa74133174505fa Mon Sep 17 00:00:00 2001
From: Shigma <1700011071@pku.edu.cn>
Date: Wed, 12 May 2021 01:17:05 +0800
Subject: [PATCH] fix(core): should support nested routers

---
 packages/koishi-core/src/context.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/koishi-core/src/context.ts b/packages/koishi-core/src/context.ts
index 1f14f52a0c..1742776a3b 100644
--- a/packages/koishi-core/src/context.ts
+++ b/packages/koishi-core/src/context.ts
@@ -584,7 +584,7 @@ const register = Router.prototype.register
 Router.prototype.register = function (this: Router, ...args) {
   const layer = register.apply(this, args)
   const context: Context = this[Context.current]
-  context.state.disposables.push(() => {
+  context?.state.disposables.push(() => {
     remove(this.stack, layer)
   })
   return layer