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<?php trait Foo { function sayHello(){ echo "Hello\n"; } } class Bar { use Foo; } function test(Foo $foo){ $foo->sayHello(); } test(new Bar);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: test(): Argument #1 ($foo) must be of type Foo, Bar given, called in /in/cFKtV on line 16 and defined in /in/cFKtV:12 Stack trace: #0 /in/cFKtV(16): test(Object(Bar)) #1 {main} thrown in /in/cFKtV on line 12
Process exited with code 255.

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