test: add uncaught exception test for debugger

test/fixtures/debug-uncaught.js

@@ -0,0 +1,16 @@
+'use strict';
+
+require('../common');
+const assert = require('assert');
+const debug = require('_debugger');
+
+function emit() {
+  const error = new Error('sterrance');
+  process.emit('uncaughtException', error);
+}
+
+assert.doesNotThrow(emit);
+
+debug.start(['fhqwhgads']);
+
+emit();

test/parallel/test-debug-uncaught-exception.js

@@ -0,0 +1,17 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const path = require('path');
+const spawnSync = require('child_process').spawnSync;
+
+const emitUncaught = path.join(common.fixturesDir, 'debug-uncaught.js');
+const result = spawnSync(process.execPath, [emitUncaught], {encoding: 'utf8'});
+
+const expectedMessage =
+  "There was an internal error in Node's debugger. Please report this bug.";
+
+assert.strictEqual(result.status, 1);
+assert(result.stderr.includes(expectedMessage));
+assert(result.stderr.includes('Error: sterrance'));
+
+console.log(result.stdout);