From 9b9cacd93c540af4840e717dd85368eb4dcb58c8 Mon Sep 17 00:00:00 2001
From: itouakirai <85016486+itouakirai@users.noreply.github.com>
Date: Wed, 17 Dec 2025 10:05:20 +0800
Subject: [PATCH] Prevent removal when instances list is empty

Add check to prevent removal from empty instances list.
---
 decrypt.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/decrypt.go b/decrypt.go
index 5d31fec..553bc56 100644
--- a/decrypt.go
+++ b/decrypt.go
@@ -48,7 +48,13 @@ func (d *Dispatcher) AddInstance(inst *WrapperInstance) {
 func (d *Dispatcher) RemoveInstance(id string) {
 	d.mu.Lock()
 	defer d.mu.Unlock()
+	if len(d.Instances) == 0 {
+		return
+	}
 	for i, inst := range d.Instances {
+		if inst == nil {
+			continue
+		}
 		if inst.id == id {
 			d.Instances = append(d.Instances[:i], d.Instances[i+1:]...)
 			break