KeyError when parsing Wahoo file

This is very similar to #10, except that the KeyError is occurring on a different call.

I wonder if the Wahoo app has updated, as I've started encountering this with files exported from my Wahoo kickr and heart-rate monitor.

Traceback (most recent call last):
  File "/Users/neil/tmp/fitdecode_bugreport/repro.py", line 4, in <module>
    for frame in fit:
  File "/Users/neil/.pyenv/versions/tmp/lib/python3.9/site-packages/fitdecode/reader.py", line 188, in __iter__
    yield from self._read_next()
  File "/Users/neil/.pyenv/versions/tmp/lib/python3.9/site-packages/fitdecode/reader.py", line 295, in _read_next
    record = self._read_record()
  File "/Users/neil/.pyenv/versions/tmp/lib/python3.9/site-packages/fitdecode/reader.py", line 440, in _read_record
    self._add_dev_field_description(message)
  File "/Users/neil/.pyenv/versions/tmp/lib/python3.9/site-packages/fitdecode/reader.py", line 774, in _add_dev_field_description
    field_def_num = message.get_field('field_definition_number').raw_value
  File "/Users/neil/.pyenv/versions/tmp/lib/python3.9/site-packages/fitdecode/records.py", line 183, in get_field
    raise KeyError(
KeyError: 'field "field_definition_number" (idx #0) not found in message "field_description"'

gzipped FIT file attached to reproduce: keyerror.fit.gz

I've worked around this by silently ignoring the KeyError:

diff --git a/fitdecode/reader.py b/fitdecode/reader.py
index 5684d49..ad31481 100644
--- a/fitdecode/reader.py
+++ b/fitdecode/reader.py
@@ -771,7 +771,10 @@ class FitReader:
                 self._chunk_offset,
                 f'dev_data_index {dev_data_index} not defined')

-        field_def_num = message.get_field('field_definition_number').raw_value
+        try:
+            field_def_num = message.get_field('field_definition_number').raw_value
+        except KeyError:
+            return
         base_type_id = message.get_field('fit_base_type_id').raw_value
         field_name = message.get_field('field_name').raw_value

but that is obviously a hack, rather than a proper fix!

polyvertex / fitdecode

KeyError when parsing Wahoo file #16