Don't include object hash in SplObjectStorage debug dump

The object hash is not particularly useful (anymore) and just
clutters the output. It encodes the same information as the
obj

Don't include object hash in SplObjectStorage debug dump

The object hash is not particularly useful (anymore) and just
clutters the output. It encodes the same information as the
object ID, which is already part of the output.

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Fix use-after-scope in SplObjectStorage::unserialize()

Introduced by the recent switch to a zend_object. Unserialize the
object into a tmp_var to avoid leaving behind a stack reference.

Fix use-after-scope in SplObjectStorage::unserialize()

Introduced by the recent switch to a zend_object. Unserialize the
object into a tmp_var to avoid leaving behind a stack reference.

Fixes oss-fuzz #29271.

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