Error: Not freed memory blocks...

[freli19]

Describe the issue

Hello,
I am trying to run a simple script that is like a hybrid of examples/basic/physics_positioning and examples/advanced/point_clouds. After running it a number of times, bproc.object.simulate_physics_and_fix_final_poses() takes longer and longer to run, and when finished I get the print out:
Blender quit
Error: Not freed memory blocks: 9, total unfreed memory 49.438984 MB
Cleaning temporary directory
What can be done to delete or free these memory blocks? I have tried to find the solution but I am yet to succeed. And also, is there a common cause for the accumulation of these?
Thank you!

Minimal code example

bproc.init()
# load blender materials from cubes
blendermetallic = bproc.loader.load_blend("U:/Data\Objekt\Blender/metallic_cube.blend", data_blocks='materials')
# Load the chosen object into the scene
active = []
for i in range(args.num_objects):
    active.append(bproc.loader.load_obj("u:\Data\object.obj")[0])

# load a surface
scene = [bproc.loader.load_obj("U:\Data\plane.obj")[0]]
scene_pos = np.array([0, 0, -1500]) # pose in mm
scene[0].set_location(scene_pos)

# load a bin for objects to fall in to
scene.append(bproc.loader.load_obj("U:\Data/bin.obj")[0])
scene[1].set_location(scene_pos + [0, 0, 110]) # pose in mm

# Make all objects actively participate in the simulation
for obj in active:
    obj.enable_rigidbody(active=True)
    obj.add_material(metallic[1])
    obj.set_cp("category_id", 1)

# The scene should only act as an obstacle and is therefore marked passive.
# To let the objects fall into the valleys of the ground, make the collision shape MESH instead of CONVEX_HULL.
for obj in scene:
    obj.enable_rigidbody(active=False, collision_shape="MESH")

# Define a function that samples the pose of a given sphere
def sample_pose(obj: bproc.types.MeshObject):
    obj.set_location(np.random.uniform(scene_pos + [-150, -150, 300], scene_pos + [150, 150, 500]))
    print(obj.get_location())
    obj.set_rotation_euler(bproc.sampler.uniformSO3())
    
# Sample the poses of all objects above the ground without any collisions in-between
bproc.object.sample_poses(
    active,
    sample_pose_func=sample_pose
)

# Run the simulation and fix the poses of the objects at the end
bproc.object.simulate_physics_and_fix_final_poses(min_simulation_time=4, max_simulation_time=60, check_object_interval=1)

bvh_tree = bproc.object.create_bvh_tree_multi_objects(active + scene)

# define the camera resolution for the pc
bproc.camera.set_resolution(1024, 1024)

bproc.camera.set_intrinsics_from_blender_params(clip_start=1200.0, clip_end=1600.0)
position, euler_rotation = [0, 0, 0], [0, 0, 0]
matrix_world = bproc.math.build_transformation_mat(position, euler_rotation)
bproc.camera.add_camera_pose(matrix_world)

# Compute a depth image from the view of the second camera pose
depth = bproc.camera.depth_via_raytracing(bvh_tree, 1)

# Project the depth again to get a point cloud
points = bproc.camera.pointcloud_from_depth(depth, 1)
points = points.reshape(-1, 3)

bproc.renderer.enable_depth_output(activate_antialiasing=False)

# set camera res for rendering
bproc.camera.set_resolution(512, 512)

# render the whole pipeline
data = bproc.renderer.render()
# Write BOP-data
bproc.writer.write_bop(output_dir = "./output/",
                       target_objects = active,
                       depths = data["depth"],
                       colors = data["colors"],
                       color_file_format = "PNG",
                       append_to_existing_output=True,
                       save_world2cam=True,
                       ignore_dist_thres=3000.0,
                       annotation_unit='m'
                       )

Files required to run the code

No response

Expected behavior

I expect the simulation to finish within 20 seconds as it did before. Now i get the following prints:

BlenderProc version

2.8.0