* Zend: always populate error pointer on failure
Most of the code base expects an error to be set if a char* is provided, as this used to be always the case. It no longer was the case since the partially supported callables were deprecates as the deprecation could be promoted to an exception in which case we skipped allocating a char*.
The simple fix, allocate a char* even in case of an exception so callers don't need to check if it still NULL. This fixes some error messages at the same time.
* tree: simplify error handling for failed zend_is_callable() calls
* docs: clarify docs for zend_is_callable()
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Co-authored-by: Arnaud Le Blanc <365207+arnaud-lb@users.noreply.github.com>
IntlIterator::current() could expose an undefined zval when called before
theiterator is positioned, or after the iterator becomes invalid.
In these cases we directly returns the undefined zval and cause to a UNKNOWN:0
output in userland. Generally, a NULL output would be more proper.
