worker: fix process._fatalException return type

This makes sure `process._fatalException()` returns a boolean when
run inside of a worker.

PR-URL: https://github.com/nodejs/node/pull/29706
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/test/parallel/test-worker-non-fatal-uncaught-exception.js b/test/parallel/test-worker-non-fatal-uncaught-exception.js
new file mode 100644
index 0000000000..01df55eec1
--- /dev/null
+++ b/test/parallel/test-worker-non-fatal-uncaught-exception.js
@@ -0,0 +1,25 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const { Worker } = require('worker_threads');
+
+// Check that `process._fatalException()` returns a boolean when run inside a
+// worker.
+
+// Do not use isMainThread so that this test itself can be run inside a Worker.
+if (!process.env.HAS_STARTED_WORKER) {
+  process.env.HAS_STARTED_WORKER = 1;
+  const w = new Worker(__filename);
+  w.on('exit', common.mustCall((code) => {
+    assert.strictEqual(code, 0);
+  }));
+  return;
+}
+
+process.once('uncaughtException', () => {
+  process.nextTick(() => {
+    assert.strictEqual(res, true);
+  });
+});
+
+const res = process._fatalException(new Error());