Same as with userland classes, automatically add a string return
type to __toString() methods in internal classes, so the signature
is compatible with Stringable.
We also need to drop pi nodes for new_pred here, as the pi node
restriction for new_pred is not necessarily true for control
coming from old_pred as well.
Fixes oss-fuzz #40782.
Requiring all internal classes (including those from 3rd-party
extensions) to implement Stringable if they provide __toString()
is too error prone. Case in point, our _ZendTestClass test class
was not doing so, resulting in preloading test failures after
recent changes.
Instead we automatically implement Stringable, the same as we do
for userland classes. We still allow explicit implementations,
but ignore them (normally they would result in an error due to
duplicate interface implementation). Finally, we need to be
careful about not trying to implement Stringable on Stringable
itself.
In some cases this changes the interface order, in particular the
automatic Stringable implementation will now come first.
Traits do not support interfaces, so we should not implement
Stringable on them.
Also check the __toString() return type in the same way other
magic methods do, otherwise we would now miss the check in the
trait case.
zend_class_implements_interface works fine if the "class" is an
interface, so simply drop this assertion. This avoids the need to
special case this situation.
While we avoid emitting labels for handlers that are not referenced
from anywhere else, we do not perform a fine-grained analysis on
used specializations, so some of the specialization labels may not
be used. Use ATTRIBUTE_UNUSED_LABEL to suppress the warning. Drop
"cold" from the definition of this attribute, as it is completely
unrelated.
iterator_funcs_ptr may be null for Iterators with custom
get_iterator. Ideally MultipleIterator would make use of get_iterator,
but this would require a large implementation change.
* PHP-7.4:
CLDR 40a0 uses a lowercase "temp" instead of "Temp" in ICU >= 70.1
Accommodate changes to canonicalized forms in ICU >= 70.1
Change UBool to bool for equality operators in ICU >= 70.1
This can happen if a call is optimized, but FETCH_DIM_FUNC_ARG
cannot be converted to FETCH_DIM_R because it uses an UNUSED op2,
which is not supported by FETCH_DIM_R.
Fixes oss-fuzz 6144185837682688.
