什么可能导致PHPUnit不打印非常大的错误消息？

这似乎只发生在我的系统上.没有其他人可以重现它.如果错误的消息太大(在我的情况下大约65k字节),屏幕上不会打印任何内容.我在Windows 7上使用PHP 7.1.3,默认的php.ini(内存限制设置为8gb)和默认的PHPUnit 6.0.13配置.错误不会出现在prompt和powershell中.

expected = $expected;
    }

    protected function matches($actual){
        return false;
    }

    function failureDescription($other): string{
        return "desc";
    }

    function toString(){
        return "description";
    }

    function additionalFailureDescription($other): string{
        return str_repeat("x", 100000);
        // If set to a smaller dump, error will appear
        // some people I asked to try could dump one million
        // bytes without problems, while I can't print more
        // than about 50k
    }
}

class SomeTest extends TestCase
{
    function testBigDump(){
        TestCase::assertThat("irrelevant", new MyConstraint("irrelevant"));
    }
}

?>

这就是我在屏幕上看到的:

Sebastian Bergmann和贡献者的PHPUnit 6.0.13.

运行时:PHPDBG 7.1.3配置:..............

F 1/1(100%)

时间:361毫秒,内存:6.00MB

有1次失败:

1)SomeTest :: testBigDump

                             <------- Notice no error description here

FAILURES!测试:1,断言:1,失败:1.

你知道是什么原因引起的吗？先感谢您.

你的配置中的东西是通过phpdbg运行phpunit测试

我重新创建了这个问题,尝试使用Windows 7 VM尽可能多地复制环境.

线索是Runtime: PHPDBG你转储中的线.显然有关phpdbg运行时的东西会阻止大缓冲区正常工作.请参阅下面的输出,通过phpdbg.exe运行时的初始输出(缺少测试说明),然后通过php.exe运行(显然是截断的):

C:\project>phpdbg -r phpunit-6.1.0.phar -v test.php
[Welcome to phpdbg, the interactive PHP debugger, v0.5.0]
To get help using phpdbg type "help" and press enter
[Please report bugs to ]
PHPUnit 6.1.0 by Sebastian Bergmann and contributors.

Runtime:       PHPDBG 7.1.4

F                                                                   1 / 1 (100%)


Time: 99 ms, Memory: 22.00MB

There was 1 failure:

1) SomeTest::testBigDump

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.
[Script ended normally]

C:\project>php phpunit-6.1.0.phar test.php
PHPUnit 6.1.0 by Sebastian Bergmann and contributors.

F                                                                   1 / 1 (100%)


Time: 109 ms, Memory: 8.00MB

There was 1 failure:

1) SomeTest::testBigDump
Failed asserting that desc.
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----- Snip -----