Comment 3 for bug 1847789

Traceback (most recent call last):
  File "/snap/subiquity/1270/lib/python3.6/site-packages/subiquity/controllers/filesystem.py", line 158, in _probe_done
    self.model.load_probe_data(probe.result)
  File "/snap/subiquity/1270/lib/python3.6/site-packages/subiquity/models/filesystem.py", line 1310, in load_probe_data
    self.reset()
  File "/snap/subiquity/1270/lib/python3.6/site-packages/subiquity/models/filesystem.py", line 1138, in reset
    config = storage_config.extract_storage_config(self._probe_data)
  File "/snap/subiquity/1270/lib/python3.6/site-packages/curtin/storage_config.py", line 1201, in extract_storage_config
    parser = pname(probe_data)
  File "/snap/subiquity/1270/lib/python3.6/site-packages/curtin/storage_config.py", line 543, in __init__
    super(BcacheParser, self).__init__(probe_data)
  File "/snap/subiquity/1270/lib/python3.6/site-packages/curtin/storage_config.py", line 393, in __init__
    self.probe_data_key)
ValueError: probe_data missing bcache data

Why isnt' the bcache kernel module present on this image.

This looks similar to the ARM64 failure: LP: #1845561