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Add non regression test for 9401 #4136

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Merged
merged 1 commit into from
Jul 21, 2025
Merged

Add non regression test for 9401 #4136

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13 changes: 13 additions & 0 deletions tests/PHPStan/Rules/Functions/ReturnTypeRuleTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -357,4 +357,17 @@ public function testBug12274(): void
]);
}

public function testBug9401(): void
{
$this->checkExplicitMixed = true;
$this->checkNullables = true;

$this->analyse([__DIR__ . '/data/bug-9401.php'], [
[
'Function Bug9401\foo() should return list<int<1, max>> but returns list<int<0, max>>.',
17,
],
]);
}

}
18 changes: 18 additions & 0 deletions tests/PHPStan/Rules/Functions/data/bug-9401.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
<?php declare(strict_types = 1);

namespace Bug9401;

/**
* @param array<mixed> $foos
* @return list<positive-int>
*/
function foo(array $foos): array
{
$list = [];
foreach ($foos as $foo) {
if (is_int($foo) && $foo >= 0) {
$list[] = $foo;
}
}
return $list;
}
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