Union type like "array|string|null" or "string|int|null" crashes Mockery

[LeSuisse]

The following code snippet crashes when the code generated by Mockery is evaluated.

class Foo {
    public function bar(array|string|null $v) {}
}

Mockery::mock(Foo::class);

In this situation, the generated code looks like this:

public function bar(array|string|null|null $v) {
    $argc = func_num_args();
    $argv = func_get_args();
    $ret = $this->_mockery_handleMethodCall(__FUNCTION__, $argv);
    return $ret;
}

I found this issue because of a mock of a class provided by a PHP extension, so I took a quick look at the other classes declared in my environment. At least the following classes are affected:

• MultipleIterator::class
• DOMXPath::class
• IntlDateFormatter::class
• Phar::class
• PharData::class
• SoapFault::class
• SoapHeader::class
• XSLTProcessor::class
• ZipArchive::class

It seems the support introduced by #1088 needs to be improved a bit to manage this case. I will try to take a look later this week.

[GrahamCampbell]

What version of mockery are you using?

[LeSuisse]

1.4.2.
The issue can also be reproduced on the current main branch, see LeSuisse@d328ed6