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<?php class R { function isError(): bool { return true; } } class S { function doSomething($input): R { return new R; } } $input = "str"; $service = new S; $shouldStop = ($result = $service->doSomething($input)) && $result->isError(); var_dump($shouldStop);
Output for git.master_jit, git.master
bool(true)

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