From dbc59c374a0954fc2c83403b4cb4b0373beed304 Mon Sep 17 00:00:00 2001
From: HuiNeng6 <3650306360@qq.com>
Date: Wed, 25 Mar 2026 07:18:59 +0800
Subject: [PATCH] fix(debugger): disable copy button when Call Stack has no
 frames

- Add guard in handleCopyStack to return early if frames array is empty
- Disable copy button when there are no stack frames to prevent empty clipboard overwrite
- Fixes issue where copy action could silently wipe user's clipboard with empty string

Fixes #37588
---
 src/components/debugger/CallStackPanel.tsx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/components/debugger/CallStackPanel.tsx b/src/components/debugger/CallStackPanel.tsx
index 5b702af2..3febad18 100644
--- a/src/components/debugger/CallStackPanel.tsx
+++ b/src/components/debugger/CallStackPanel.tsx
@@ -143,6 +143,8 @@ export function CallStackPanel() {
   };
 
   const handleCopyStack = async () => {
+    // Guard: do not overwrite clipboard when there are no frames
+    if (frames().length === 0) return;
     const text = frames()
       .map((f) => {
         const loc = f.source?.path ? `${f.source.path}:${f.line}${f.column > 0 ? `:${f.column}` : ""}` : "unknown";
@@ -162,7 +164,7 @@ export function CallStackPanel() {
               <Icon name={showThreads() ? "eye" : "eye-slash"} size={12} />
             </IconButton>
           </Show>
-          <IconButton size="sm" variant="ghost" onClick={handleCopyStack} title="Copy Call Stack">
+          <IconButton size="sm" variant="ghost" onClick={handleCopyStack} disabled={frames().length === 0} title="Copy Call Stack">
             <Icon name="copy" size={12} />
           </IconButton>
         </div>