Added regression test

Author: staabm

tests/end-to-end/regression/4347.phpt

@@ -0,0 +1,21 @@
+--TEST--
+https://github.com/sebastianbergmann/phpunit/issues/4347
+--FILE--
+<?php declare(strict_types=1);
+$_SERVER['argv'][] = '--do-not-cache-result';
+$_SERVER['argv'][] = '--no-configuration';
+$_SERVER['argv'][] = __DIR__ . '/4347/TestIssue4347.php';
+
+require_once __DIR__ . '/../../bootstrap.php';
+
+(new PHPUnit\TextUI\Application)->run($_SERVER['argv']);
+--EXPECTF--
+PHPUnit %s by Sebastian Bergmann and contributors.
+
+Runtime: %s
+
+.                                                                   1 / 1 (100%)
+
+Time: %s, Memory: %s
+
+OK (1 test, 1 assertion)

tests/end-to-end/regression/4347/TestIssue4347.php

@@ -0,0 +1,30 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\TestFixture;
+
+use Exception;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+
+class TestIssue4347 extends TestCase
+{
+    public static function thisMethodDataProvider()
+    {
+        return [
+            [new Exception('my message')],
+        ];
+    }
+
+    #[DataProvider('thisMethodDataProvider')]
+    public function testThisMethod(Exception $expectedException): void
+    {
+        $this->assertSame('my message', $expectedException->getMessage());
+    }
+}