Handle duplicate signals

vercel · Jul 9, 2024 · e94b7e6 · e94b7e6
1 parent d7a49d5
commit e94b7e6
Showing 1 changed file with 11 additions and 1 deletion.
diff --git a/packages/next/src/server/lib/start-server.ts b/packages/next/src/server/lib/start-server.ts
@@ -270,10 +270,20 @@ export async function startServer(
 
       try {
         const cleanupListeners = [() => new Promise((res) => server.close(res))]
+        let cleanupStarted = false
         const cleanup = () => {
-          debug('start-server process cleanup')
+          if (cleanupStarted) {
+            // We can get duplicate signals, e.g. when `ctrl+c` is used in an
+            // interactive shell (i.e. bash, zsh), the shell will recursively
+            // send SIGINT to children. The parent `next-dev` process will also
+            // send us SIGINT.
+            return
+          }
+          cleanupStarted = true
           ;(async () => {
+            debug('start-server process cleanup')
             await Promise.all(cleanupListeners.map((f) => f()))
+            debug('start-server process cleanup finished')
             process.exit(0)
           })()
         }