<?php declare(strict_types = 1);

/** @template T of array-key */
class Foo {
	/** @return T|bool */
	public function doFoo() {} // @phpstan-ignore-line
}

/** @var Foo<int> $foo */
$foo = new Foo;

\PHPStan\Testing\assertType('bool|int', $foo->doFoo());

// Working

/** @template T */
class Bar {
	/** @return T|bool */
	public function doBar() {} // @phpstan-ignore-line
}

/** @var Bar<int> $bar */
$bar = new Bar;

\PHPStan\Testing\assertType('bool|int', $bar->doBar());