Zend incompatibility: ArrayObject not valid argument to array functions

[jeffchan]

The following code produces no errors in Zend PHP. However, HHVM throws an error:
HipHop Warning: Invalid operand type was used: expecting an array

$ao = new ArrayObject();
next($ao);
prev($ao);
reset($ao);

I am guessing all of PHP's array functions have issues with ArrayObject as inputs in HHVM.

There was a similar discussion in #1221. Is this something we're looking to fix?

phpMyAdmin is failing a test due to this

[jeffchan]

This inconsistency is documented here https://github.com/facebook/hhvm/blob/master/hphp/doc/inconsistencies#L90

will seek to fix phpMyAdmin then