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<?php class Foo extends IteratorIterator { function __construct( $items ) { if ( is_array( $items ) ) { $items = new ArrayIterator( $items ); } } function __debugInfo() { return [ "count" => iterator_count( $this ) ]; } } $a = new Foo( [ 1,2,3 ] ); var_dump( $a ); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Uncaught Error: The object is in an invalid state as the parent constructor was not called in /in/tHteN:14 Stack trace: #0 [internal function]: IteratorIterator->rewind() #1 /in/tHteN(14): iterator_count(Object(Foo)) #2 [internal function]: Foo->__debugInfo() #3 /in/tHteN(19): var_dump(Object(Foo)) #4 {main} thrown in /in/tHteN on line 14 Fatal error: __debuginfo() must return an array in /in/tHteN on line 19
Process exited with code 255.

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