The bytecode reader could enter an infinite loop when parsing deeply
nested attributes containing type references. The deferred worklist
stored only indices without distinguishing between attributes and types,
causing type indexes to be misinterpreted as attributes.
This patch changes the deferred worklist to store pairs of (index, kind)
to track whether each deferred entry is a type or attribute. The
worklist processing logic is updated to resolve the correct entry type.
0727fcb11d