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c1cea90043
Protobuf 7.x (shipped in Arch Linux) removed the `label` instance
attribute from `FieldDescriptor`. Accessing `field.label` now
raises `AttributeError`, which breaks all CRIU tests at the
`check_pages_counts` step when pycriu tries to convert protobuf
stats images to dicts:
File "test/pycriu/images/pb2dict.py", line 345, in pb2dict
if field.label == FD.LABEL_REPEATED:
AttributeError: 'FieldDescriptor' object has no attribute 'label'
Protobuf 7.x replaced `field.label` with boolean properties
`field.is_repeated` and `field.is_required`. These properties
do not exist in protobuf 3.x/4.x.
Add a `_is_repeated()` compatibility helper that checks for the
`label` attribute first (protobuf <= 5.x) and falls back to
`is_repeated` (protobuf >= 7.x), keeping pycriu working across
both old and new protobuf versions.
Assisted-by: Claude Code (claude-opus-4-6):claude-opus-4-6@default
Signed-off-by: Adrian Reber <areber@redhat.com>
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