Null-coalescing does not work when method returns null

[norkunas]

{{ something.nice(category) ?? 'nope' }}

should return nope but the result is empty

tried to add a test to tests/IntegrationTest.php but not sure how to inject an object for tests/Fixtures/tests/null_coalesce.test

this broke my code after latest release: i had a function where it accepts only string type but then the null coalesce stopped working and null was passed instead of the fallback string

[fabpot]

Can you share a small reproducer? Or at least, tell me if category exists, and the nice() call return value.

[fabpot]

Can you share a small reproducer? Or at least, tell me if category exists, and the nice() call return value.

I think I know: the method and argument does exist, and the method returns an empty string or null. It should then return nope but it returns an empty string instead.

[azlotnikov]

It can be reproduced when object getter is used. Here is example:

require_once 'vendor/autoload.php';

class SomeClass {
    private ?string $var = null;

    public function getVar(): ?string {
        return $this->var;
    }
}

$loader = new \Twig\Loader\FilesystemLoader('templates');
$twig = new \Twig\Environment($loader);

$a = new SomeClass();

echo $twig->render('test.twig', [
    'a' => $a,
]);

{{ a.var ?? 123 }}

Twig 3.17 Output:

Twig 3.16 Output:

123

[fabpot]

New release published.