test: add regression test for signal handler removal in exit

Refs: #30581
Refs: #30582

PR-URL: #30589
Refs: #30581
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: addaleax

test/parallel/test-signal-handler-remove-on-exit.js

@@ -0,0 +1,9 @@
+'use strict';
+require('../common');
+
+// Regression test for https://github.com/nodejs/node/issues/30581
+// This script should not crash.
+
+function dummy() {}
+process.on('SIGINT', dummy);
+process.on('exit', () => process.removeListener('SIGINT', dummy));