@@ -348,7 +348,7 @@ void UtilityProcessWrapper::Shutdown(uint32_t exit_code) {
 }
 
 void UtilityProcessWrapper::PostMessage(gin::Arguments* const args) {
-  if (!node_service_remote_.is_connected())
+  if (!connector_ || connector_closed_)
     return;
 
   blink::TransferableMessage transferable_message;
@@ -445,7 +445,7 @@ void UtilityProcessWrapper::OnV8FatalError(const std::string& location,
 }
 
 void UtilityProcessWrapper::CreateAndSendURLLoaderFactory(bool /* crashed */) {
-  if (!node_service_remote_.is_connected())
+  if (!node_service_remote_.is_bound() || !node_service_remote_.is_connected())
     return;
 
   node_service_remote_->UpdateURLLoaderFactory(CreateURLLoaderFactoryParams());
 
@@ -0,0 +1,23 @@
+// Calling postMessage() on a utility process from its 'exit' listener, or
+// after the process has gone away, must be a no-op rather than crashing the
+// main process.
+const { app, utilityProcess } = require('electron');
+
+const path = require('node:path');
+
+app.whenReady().then(() => {
+  const child = utilityProcess.fork(path.join(__dirname, 'utility.js'));
+  child.on('exit', () => {
+    child.postMessage('after-exit');
+    setTimeout(() => {
+      child.postMessage('after-exit-later');
+      app.quit();
+    });
+  });
+  child.once('message', () => {
+    // Child is up; quit while it is still running so the exit event is
+    // delivered from the shutdown path.
+    child.postMessage('before-exit');
+    app.quit();
+  });
+});
@@ -0,0 +1,3 @@
+process.parentPort.on('message', () => {});
+process.parentPort.postMessage('ready');
+setInterval(() => {}, 1000);
Original file line number	Diff line number	Diff line change
`@@ -348,7 +348,7 @@ void UtilityProcessWrapper::Shutdown(uint32_t exit_code) {`
`348`	`348`	`}`
`349`	`349`
`350`	`350`	`void UtilityProcessWrapper::PostMessage(gin::Arguments* const args) {`
`351`		`- if (!node_service_remote_.is_connected())`
	`351`	`+ if (!connector_ \|\| connector_closed_)`
`352`	`352`	`return;`
`353`	`353`
`354`	`354`	`blink::TransferableMessage transferable_message;`
`@@ -445,7 +445,7 @@ void UtilityProcessWrapper::OnV8FatalError(const std::string& location,`
`445`	`445`	`}`
`446`	`446`
`447`	`447`	`void UtilityProcessWrapper::CreateAndSendURLLoaderFactory(bool /* crashed */) {`
`448`		`- if (!node_service_remote_.is_connected())`
	`448`	`+ if (!node_service_remote_.is_bound() \|\| !node_service_remote_.is_connected())`
`449`	`449`	`return;`
`450`	`450`
`451`	`451`	`node_service_remote_->UpdateURLLoaderFactory(CreateURLLoaderFactoryParams());`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+process.parentPort.on('message', () => {});`
	`2`	`+process.parentPort.postMessage('ready');`
	`3`	`+setInterval(() => {}, 1000);`