Trying to read last event from data file causes segmentation fault

The attached Python script causes a segmentation fault on most (but not all) of the data files I've tried it with. The output typically looks like this:

$ ./print_last_event.py qlq.mwk
time    = 24054249
code    = 1
value   = {'payload': {'paused': 0, 'loaded': 1, 'running': 0, 'experiment path': '/var/folders/v1/v1qsITo9GJezLwbJ2VOfM++++TI/-Tmp-/MWorks/Experiment Cache/_Users_cstawarz_Documents_Work_McGovern_mworks_mw_suite_mw_examples_Tests_Action_QueueLiveQueue', 'experiment name': 'MyExperiment'}, 'payload_type': 4013, 'event_type': 1002}

time    = 211897957
code    = 3
Segmentation fault

Using the MATLAB getEvents function produces a similar result, so the problem isn't specific to the Python interface.

The crash happens at PythonDataBindingsHelpers.cpp:208, when trying to dereference a bogus pointer (e.g. 0x3) to a ScarabDatum struct. The bad pointer comes from EventWrapper::getPayload. The time on the event is suspect (~10x the time stamp of the previous event), which makes me think the whole event is bogus.

Is dfindex mistakenly reading past the end of the event stream? Or is there unexpected, non-event data at the end of the data file?