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<?php function foo((\Foo\Bar&\Foo\Baz)|\Foo\Qux $param = null) { var_dump($param); } foo(null);
Output for git.master_jit, git.master
Deprecated: foo(): Implicitly marking parameter $param as nullable is deprecated, the explicit nullable type must be used instead in /in/UADDP on line 3 NULL

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