No Trace:
Exception: test

Default Trace:
Traceback (most recent call last):
  File "circuitpython/traceback_test.py", line 13, in <module>
  File "circuitpython/traceback_test.py", line 9, in fun
Exception: test

Limit=1 Trace:
Traceback (most recent call last):
  File "circuitpython/traceback_test.py", line 13, in <module>
Exception: test

Limit=0 Trace:
Exception: test

Limit=-1 Trace:
Traceback (most recent call last):
  File "circuitpython/traceback_test.py", line 9, in fun
Exception: test

NonNative Trace:
Traceback (most recent call last):
  File "circuitpython/traceback_test.py", line 32, in <module>
NonNativeException: test