stateful _print_step doesn't display invariant

[touilleMan]

minimal example:

from hypothesis.stateful import *

class StateMachine(RuleBasedStateMachine):
    @invariant()
    def invariant1(self):
        assert False

    @rule()
    def rule1(self):
        assert True

run_state_machine_as_test(StateMachine)

Running this code gives:

Falsifying example:
state = StateMachine()
state.teardown()
Traceback (most recent call last):
  File "test42.py", line 33, in <module>
    run_state_machine_as_test(StateMachine)
  File "/home/emmanuel/projects/hypothesis-trio/venv/lib/python3.8/site-packages/hypothesis/stateful.py", line 75, in run_state_machine_as_test
    def run_state_machine_as_test(state_machine_factory, *, settings=None):
  File "/home/emmanuel/projects/hypothesis-trio/venv/lib/python3.8/site-packages/hypothesis/internal/reflection.py", line 655, in accept
    return func(*bound.args, **bound.kwargs)
  File "/home/emmanuel/projects/hypothesis-trio/venv/lib/python3.8/site-packages/hypothesis/stateful.py", line 200, in run_state_machine_as_test
    run_state_machine(state_machine_factory)
  File "/home/emmanuel/projects/hypothesis-trio/venv/lib/python3.8/site-packages/hypothesis/stateful.py", line 92, in run_state_machine
    @given(st.data())
  File "/home/emmanuel/projects/hypothesis-trio/venv/lib/python3.8/site-packages/hypothesis/core.py", line 1164, in wrapped_test
    raise the_error_hypothesis_found
  File "test42.py", line 27, in invariant1
    assert False
AssertionError

However the falsifying example displayed doesn't trigger the error.
The falsifying should be:

state = StateMachine()
state.invariant1()
state.teardown()