From b2597243992dbfd718eb94a658fd02095606f6c3 Mon Sep 17 00:00:00 2001
From: Igor Strebezhev <xamgore@users.noreply.github.com>
Date: Wed, 3 Mar 2021 03:52:08 +0300
Subject: [PATCH] Fix unhandled ERR_IPC_CHANNEL_CLOSED and a deadlock

The detailed description is at https://github.com/facebook/jest/issues/11143.
---
 packages/jest-worker/src/workers/ChildProcessWorker.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/jest-worker/src/workers/ChildProcessWorker.ts b/packages/jest-worker/src/workers/ChildProcessWorker.ts
index 6b7daa4758f2..8c3e13bccd38 100644
--- a/packages/jest-worker/src/workers/ChildProcessWorker.ts
+++ b/packages/jest-worker/src/workers/ChildProcessWorker.ts
@@ -205,6 +205,7 @@ export default class ChildProcessWorker implements WorkerInterface {
   private _onExit(exitCode: number) {
     if (
       exitCode !== 0 &&
+      exitCode !== null &&
       exitCode !== SIGTERM_EXIT_CODE &&
       exitCode !== SIGKILL_EXIT_CODE
     ) {
@@ -236,7 +237,7 @@ export default class ChildProcessWorker implements WorkerInterface {
 
     this._request = request;
     this._retries = 0;
-    this._child.send(request);
+    this._child.send(request, () => {});
   }
 
   waitForExit(): Promise<void> {