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- --TEST--
- call_user_func() in combination with "Call to a member function method() on a non-object"
- --FILE--
- <?php
- $comparator= null;
- var_dump(call_user_func([$comparator, 'compare'], 1, 2));
- echo "Alive\n";
- ?>
- --EXPECTF--
- Warning: call_user_func() expects parameter 1 to be a valid callback, first array member is not a valid class name or object in %s on line %d
- NULL
- Alive
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