internal iterator rewind handler is called twice #12060
Description
Description
Hi,
The InternalIterator class (in zend_interfaces.c) uses an internal rewind_called flag to ensure that internal iterators are always rewound. This flag is checked by the zend_internal_iterator_ensure_rewound function, in the following methods:
InternalIterator::current()InternalIterator::key()InternalIterator::next()InternalIterator::valid()
However, in the InternalIterator::rewind() method, the rewind_called flag is not properly set when the iterator has a rewind handler. As a result, the internal iterator's rewind handler is always called twice on first iteration.
This is problematic since internal iterators can perform potentially heavy initialization logic in the rewind handler (like performing a query in the case of a database result-set iterator).
PHP Version
PHP 8.3-dev
Operating System
irrelevant
