When ParticleSystemForce object is deleted then on accessing its Preset when Editor is in play mode throws errors in the console. Refer attached video and stack trace
Steps to repro:
1. Create a new project.
2. Hierarchy > Effects > Particle System Force Field > Create Preset
3. Hierarchy > Particle System Force Field > Delete
4. Project > Particle System Force Field Preset > Editor > Play Mode.
Actual Result:
Errors spam the console on accessing Preset when ParticleSystemForce is deleted.
Expected Result:
No error should be thrown in the console on accessing Preset when ParticleSystemForce is deleted, Or more user-friendly warning should be thrown
Occurring on:
2021.2.0a7, 2021.2.0a1, 2021.1.0b10, 2021.1.0a1, 2020.2.6f1, 2020.1.17f1, 2019.4.21f1
Environment:
Windows 10 & macOS 10.15
Stack Trace:
SerializedObject target has been destroyed.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)
ArgumentNullException: Value cannot be null.
Parameter name: source
UnityEditor.Presets.PresetEditor.DrawInternalInspector () (at /Users/bokken/buildslave/unity/build/Modules/PresetsEditor/PresetEditor.cs:311)
UnityEditor.Presets.PresetEditor.DrawPresetData () (at /Users/bokken/buildslave/unity/build/Modules/PresetsEditor/PresetEditor.cs:119)
UnityEditor.Presets.PresetEditor.OnInspectorGUI () (at /Users/bokken/buildslave/unity/build/Modules/PresetsEditor/PresetEditor.cs:107)
UnityEditor.UIElements.InspectorElement+<>c_DisplayClass59_0.<CreateIMGUIInspectorFromEditor>b_0 () (at /Users/bokken/buildslave/unity/build/External/MirroredPackageSources/com.unity.ui/Editor/Inspector/InspectorElement.cs:617)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189