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<?php class A { public A $prop; } class B extends A { } $a = new A(); $a_prop = new A(); $a->prop = $a_prop; var_dump($a); $b = new B(); $b_prop = new B(); $b->prop = $b_prop; var_dump($b);
Output for git.master, git.master_jit, rfc.property-hooks
object(A)#1 (1) { ["prop"]=> object(A)#2 (0) { ["prop"]=> uninitialized(A) } } object(B)#3 (1) { ["prop"]=> object(B)#4 (0) { ["prop"]=> uninitialized(A) } }

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