From 5c45b13a262753c676525555f4689a9008d1852b Mon Sep 17 00:00:00 2001
From: Markus Staab <maggus.staab@googlemail.com>
Date: Wed, 6 Aug 2025 09:29:32 +0200
Subject: [PATCH 1/2] Test events while process isolation

---
 .../5592-process-isolation-events.phpt        | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 tests/end-to-end/regression/5592-process-isolation-events.phpt

diff --git a/tests/end-to-end/regression/5592-process-isolation-events.phpt b/tests/end-to-end/regression/5592-process-isolation-events.phpt
new file mode 100644
index 0000000000..3fcf21b265
--- /dev/null
+++ b/tests/end-to-end/regression/5592-process-isolation-events.phpt
@@ -0,0 +1,69 @@
+--TEST--
+https://github.com/sebastianbergmann/phpunit/pull/5592
+--FILE--
+<?php declare(strict_types=1);
+$_SERVER['argv'][] = '--do-not-cache-result';
+$_SERVER['argv'][] = '--no-configuration';
+$_SERVER['argv'][] = '--process-isolation';
+$_SERVER['argv'][] = '--debug';
+$_SERVER['argv'][] = __DIR__ . '/5592/Issue5592TestIsolation.php';
+
+set_exception_handler(static fn () => null);
+
+require_once __DIR__ . '/../../bootstrap.php';
+(new PHPUnit\TextUI\Application)->run($_SERVER['argv']);
+--EXPECTF--
+PHPUnit Started (PHPUnit %s using %s)
+Test Runner Configured
+Event Facade Sealed
+Test Suite Loaded (6 tests)
+Test Runner Started
+Test Suite Sorted
+Test Runner Execution Started (6 tests)
+Test Suite Started (PHPUnit\TestFixture\Issue5592TestIsolation, 6 tests)
+Child Process Started
+Test Preparation Started (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedErrorHandler)
+Test Prepared (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedErrorHandler)
+Test Passed (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedErrorHandler)
+Test Finished (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedErrorHandler)
+Child Process Finished
+Child Process Started
+Test Preparation Started (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedErrorHandler)
+Test Prepared (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedErrorHandler)
+Test Failed (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedErrorHandler)
+Failed asserting that false is true.
+Test Finished (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedErrorHandler)
+Child Process Finished
+Child Process Started
+Test Preparation Started (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedErrorHandler)
+Test Prepared (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedErrorHandler)
+Test Failed (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedErrorHandler)
+Failed asserting that false is true.
+Test Considered Risky (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedErrorHandler)
+Test code or tested code removed error handlers other than its own
+Test Finished (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedErrorHandler)
+Child Process Finished
+Child Process Started
+Test Preparation Started (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedExceptionHandler)
+Test Prepared (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedExceptionHandler)
+Test Passed (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedExceptionHandler)
+Test Finished (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedAndRemovedExceptionHandler)
+Child Process Finished
+Child Process Started
+Test Preparation Started (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedExceptionHandler)
+Test Prepared (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedExceptionHandler)
+Test Failed (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedExceptionHandler)
+Failed asserting that false is true.
+Test Finished (PHPUnit\TestFixture\Issue5592TestIsolation::testAddedExceptionHandler)
+Child Process Finished
+Child Process Started
+Test Preparation Started (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedExceptionHandler)
+Test Prepared (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedExceptionHandler)
+Test Failed (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedExceptionHandler)
+Failed asserting that false is true.
+Test Finished (PHPUnit\TestFixture\Issue5592TestIsolation::testRemovedExceptionHandler)
+Child Process Finished
+Test Suite Finished (PHPUnit\TestFixture\Issue5592TestIsolation, 6 tests)
+Test Runner Execution Finished
+Test Runner Finished
+PHPUnit Finished (Shell Exit Code: 1)

From 185412d5a35b2b82a1bff2a767b09252e2b0b0c1 Mon Sep 17 00:00:00 2001
From: Markus Staab <maggus.staab@googlemail.com>
Date: Tue, 12 Aug 2025 13:00:42 +0200
Subject: [PATCH 2/2] use named exception handler

---
 .../regression/5592-process-isolation-events.phpt           | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tests/end-to-end/regression/5592-process-isolation-events.phpt b/tests/end-to-end/regression/5592-process-isolation-events.phpt
index 3fcf21b265..f18e32dea0 100644
--- a/tests/end-to-end/regression/5592-process-isolation-events.phpt
+++ b/tests/end-to-end/regression/5592-process-isolation-events.phpt
@@ -8,7 +8,11 @@ $_SERVER['argv'][] = '--process-isolation';
 $_SERVER['argv'][] = '--debug';
 $_SERVER['argv'][] = __DIR__ . '/5592/Issue5592TestIsolation.php';
 
-set_exception_handler(static fn () => null);
+function global5592IsolationEventsExceptionHandler(Throwable $exception): void
+{
+}
+
+set_exception_handler('global5592IsolationEventsExceptionHandler');
 
 require_once __DIR__ . '/../../bootstrap.php';
 (new PHPUnit\TextUI\Application)->run($_SERVER['argv']);