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@ 2024-06-07T07:15:03Z

<?php

namespace PHPUnit\TestFixture;

use function set_error_handler;
use function trigger_error;
use PHPUnit\Framework\TestCase;

class SomeExternalDependency {
    public function __construct()
    {
        set_error_handler([$this, 'logError']);
        
        $this->triggerError();
    }
    
    public static function triggerError(): void
    {
        trigger_error('error', E_USER_WARNING);
    }

    private function logError(): bool
    {
        debug_print_backtrace();
        
        return true;
    }
}

class Issue5844Test
{

    public function testSetErrorHandlerNonCallable(): void
    {
        new SomeExternalDependency();
        $callableWithPrivateMethod = set_error_handler(static fn () => false);
        restore_error_handler();
        restore_error_handler();
        set_error_handler($callableWithPrivateMethod);
        
        echo "\nii.\n";
        SomeExternalDependency::triggerError();

        echo "\niii.\n";
        trigger_error('error', E_USER_WARNING);

        // $this->assertTrue(true);
    }
}

(new Issue5844Test())->testSetErrorHandlerNonCallable();

Output for 8.1.0 - 8.1.29, 8.2.0 - 8.2.22, 8.3.0 - 8.3.10: #0 [internal function]: PHPUnit\TestFixture\SomeExternalDependency->logError(512, 'error', '/in/GFd18', 19) #1 /in/GFd18(19): trigger_error('error', 512) #2 /in/GFd18(14): PHPUnit\TestFixture\SomeExternalDependency::triggerError() #3 /in/GFd18(35): PHPUnit\TestFixture\SomeExternalDependency->__construct() #4 /in/GFd18(51): PHPUnit\TestFixture\Issue5844Test->testSetErrorHandlerNonCallable() Fatal error: Uncaught TypeError: set_error_handler(): Argument #1 ($callback) must be a valid callback or null, cannot access private method PHPUnit\TestFixture\SomeExternalDependency::logError() in /in/GFd18:39 Stack trace: #0 /in/GFd18(39): set_error_handler(Array) #1 /in/GFd18(51): PHPUnit\TestFixture\Issue5844Test->testSetErrorHandlerNonCallable() #2 {main} thrown in /in/GFd18 on line 39
Process exited with code 255.

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