Why does pyzeebe always "return" all task variables on job completion?

[datakurre]

I am curious about this decision:

pyzeebe/pyzeebe/task/task_builder.py

Line 36 in 0586dfe

job.variables.update(original_return_value)

Why does pyzeebe always return all fetched task variables on job completion instead of just returning the variables returned by the worker?

Run into this when parallel multi-instance task was not behaving as expected, because pyzeebe ended up overwriting output collection variable (once it had been set after first completed worker). As a result, my multi-instance task's output collection was mostly filled with null values.

After patching variables dictionary to clean up variables on update on after_job hook my parallel multi-instance task was fixed to return expected output collection.