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<?php function test(DateTime $dt) {} test(new DateTimeImmutable());
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: test(): Argument #1 ($dt) must be of type DateTime, DateTimeImmutable given, called in /in/4GSjI on line 5 and defined in /in/4GSjI:3 Stack trace: #0 /in/4GSjI(5): test(Object(DateTimeImmutable)) #1 {main} thrown in /in/4GSjI on line 3
Process exited with code 255.

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