bl_info = {
    "name": "Memory Leak Debug",
    "version": (0, 0, 1),
    "blender": (2, 80, 0),
    "category": "Debug",
}

import bpy
import gpu

shader_info = gpu.types.GPUShaderCreateInfo()
shader_info.vertex_source('void main() {}')
shader_info.fragment_source('void main() {}')

shader = gpu.shader.create_from_info(shader_info)
del shader_info

def test_update(self, context):
    pass

class TestProperties(bpy.types.PropertyGroup):
    test: bpy.props.BoolProperty(name="Test", update=test_update)

def register():
    bpy.utils.register_class(TestProperties)

def unregister():
    bpy.utils.unregister_class(TestProperties)