city_intersection worlds `city_intersection.wbt` file is broken when loaded into Webots

[abanuelo]

System Details

1. Python version: 3.10.12
2. Scenic Version: 3.0.0b2
3. Operating System: Linux
4. Simulator Version: Webots 2023a

Detailed Description

1. When you load the city_intersection.wbt file into Webots, it generates the stack trace below
2. scenic runs when you load the city_intersection.wbt file
3. Error log:

   INFO: scenic_supervisor: Starting controller: /home/ubuntu/Scenic/venv/bin/python -u scenic_supervisor.py
   WARNING: autonomous_vehicle: Could not find controller file:
   WARNING: autonomous_vehicle: Expected either: autonomous_vehicle, autonomous_vehicle.jar, autonomous_vehicle.class, autonomous_vehicle.py, autonomous_vehicle.m  or Dockerfile
   INFO: autonomous_vehicle: Try to compile the C/C++ source code, to get a new executable file.
   WARNING: autonomous_vehicle: Starts the <generic> controller instead.
   INFO: <generic>: Starting controller: /software/webotsR2023a/resources/projects/controllers/generic/generic
   WARNING: autonomous_vehicle: Could not find controller file:
   WARNING: autonomous_vehicle: Expected either: autonomous_vehicle, autonomous_vehicle.jar, autonomous_vehicle.class, autonomous_vehicle.py, autonomous_vehicle.m  or Dockerfile
   INFO: autonomous_vehicle: Try to compile the C/C++ source code, to get a new executable file.
   WARNING: autonomous_vehicle: Starts the <generic> controller instead.
   INFO: <generic>: Starting controller: /software/webotsR2023a/resources/projects/controllers/generic/generic
   Traceback (most recent call last; use -b to show Scenic internals):
   File "/home/ubuntu/actions/Scenic/examples/webots/city_intersection/controllers/scenic_supervisor/scenic_supervisor.py", line 26, in <module>
   sim_results = simulator.simulate(scene, timestep=0.5, verbosity=2)
   File "/home/ubuntu/Scenic/src/scenic/simulators/webots/simulator.py", line 56, in createSimulation
   return WebotsSimulation(
   File "/home/ubuntu/Scenic/src/scenic/simulators/webots/simulator.py", line 82, in __init__
   super().__init__(scene, timestep=timestep, **kwargs)
   File "/home/ubuntu/actions/Scenic/examples/webots/city_intersection/city_intersection.scenic", line 55, in applyTo
   target_path = self.path + "/"
   TypeError: unsupported operand type(s) for +: 'PosixPath' and 'str'
   Loading Scenic scenario ../../city_intersection.scenic
   Starting new simulation...
   Starting simulation 1...
   Other Car Visible: False
   WARNING: 'scenic_supervisor' controller exited with status: 1.

Steps To Reproduce

1. Open up webots
2. Load in world file city_intersection.wbt
3. Click the run button ** Note make sure that the python path is pointing to the python installed within the venv created for Scenic related dependencies

Issue Submission Checklist

• [X] I am reporting an issue, not asking a question
• [X] I checked the open and closed issues, forum, etc. and have not found any solution
• [X] I have provided all necessary code, etc. to reproduce the issue

[abanuelo]

Following up on this example, I noticed that there were additional steps needed to run this example, namely: running make within the controllers directory. After that was done and I loaded up the city_intersection.wbt file within webots I faced this issue:

WARNING: scenic_supervisor: Forced termination (because process didn't terminate itself after 1 second).
INFO: scenic_supervisor: Starting controller: /home/ubuntu/Scenic/venv/bin/python -u scenic_supervisor.py
INFO: autonomous_vehicle: Starting controller: /home/ubuntu/Scenic/examples/webots/city_intersection/controllers/autonomous_vehicle/autonomous_vehicle
INFO: autonomous_vehicle: Starting controller: /home/ubuntu/Scenic/examples/webots/city_intersection/controllers/autonomous_vehicle/autonomous_vehicle
Traceback (most recent call last; use -b to show Scenic internals):
  File "/home/ubuntu/Scenic/examples/webots/city_intersection/controllers/scenic_supervisor/scenic_supervisor.py", line 26, in <module>
    sim_results = simulator.simulate(scene, timestep=0.5, verbosity=2)
  File "/home/ubuntu/Scenic/src/scenic/simulators/webots/simulator.py", line 56, in createSimulation
    return WebotsSimulation(
  File "/home/ubuntu/Scenic/src/scenic/simulators/webots/simulator.py", line 82, in __init__
    super().__init__(scene, timestep=timestep, **kwargs)
  File "/home/ubuntu/Scenic/examples/webots/city_intersection/city_intersection.scenic", line 55, in applyTo
    target_path = self.path + "/"
TypeError: unsupported operand type(s) for +: 'PosixPath' and 'str'
Loading Scenic scenario ../../city_intersection.scenic
Starting new simulation...
  Starting simulation 1...
Other Car Visible: False
WARNING: 'scenic_supervisor' controller exited with status: 1.
Error: could not open "../../images/live_img.jpeg" for writing
Error: could not open "../../images/live_img.jpeg" for writing
Error: could not open "../../images/live_img.jpeg" for writing
Error: could not open "../../images/live_img.jpeg" for writing
Error: could not open "../../images/live_img.jpeg" for writing