From eee740e080b5eb983c8d1a35589a62bdd673e674 Mon Sep 17 00:00:00 2001
From: zenghongru <zenghongru@gmail.com>
Date: Thu, 17 Jun 2021 10:27:31 +0800
Subject: [PATCH] fix: no profiling

---
 agent/agent.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/agent/agent.go b/agent/agent.go
index 0851e2e..759fa3b 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -303,6 +303,10 @@ func (a *Agent) onSchedule(ctx context.Context) {
 	defer close(a.done)
 
 	r := a.initRing()
+	if r == nil {
+		return
+	}
+
 	pt := r.Value.(profile.Type)
 
 	ctx, cancel := context.WithCancel(ctx)