Bug report

Those are swallowed by set_error_handler in FileAnalyser. This causes custom rule bugs never to be discovered even when the testcase causes them.

class MyRule implements \PHPStan\Rules\Rule
{

	public function getNodeType(): string
	{
		return Node::class;
	}

	public function processNode(Node $node, Scope $scope): array
	{
		echo $undefined; // no warning in PHPUnit, no PHPStan error emitted
	}

}

Code snippet that reproduces the problem

No response

Expected output

Warnings to be emitted in tests based on my phpunit settings.

Did PHPStan help you today? Did it make you happy in any way?

No response