Unity Issue Tracker - NullReferenceException error occurs when a GameObject with a script component referencing its unique ID is selected before or during Play Mode

Won't Fix

6.0.X

2023.3.X

2023.2.X

2023.1.X

2022.2.X

2021.3.X

Default references only works in EditMode, if they are used in PlayMode they will be null. But Default References have another behavior when in Editor-Only assemblies (ie. /Editor folder when not using Asmdef's, or Asmdefs only compatible with the Editor).

Cancelling this 2023.2 tech release issue since the support for this release has come to end of life. Cancelling this 2023.2 port case does not affect any LTS or Unity 6 Beta/Preview that remain open.

This Unity version will no longer be getting patch updates.

How to reproduce:
1. Open the “NullReferenceException error“ project
2. Select the “TimerIDTest“ GameObject in the Hierarchy
3. Enter Play Mode
4. Observe the Console Window

Expected result: No errors seen in the Console Window
Actual result: “NullReferenceException“ error seen in the Console Window

Reproducible with: 2021.3.21f1, 2022.2.11f1, 2023.1.0b8, 2023.2.0a6
Could not test with: 2020.3.46f1 (due to errors)

Reproducible on: Windows 10

NullReferenceException error occurs when a GameObject with a script component referencing its unique ID is selected before or during Play Mode

Unity: Scripting Runtime

Won't Fix

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NullReferenceException error occurs when a GameObject with a script component referencing its unique ID is selected before or during Play Mode

Unity: Scripting Runtime

Statuses

Won't Fix

Resolution Notes

6.0.XWon't FixDefault references only works in EditMode, if they are used in PlayMode they will be null. But Default References have another behavior when in Editor-Only assemblies (ie. /Editor folder when not using Asmdef's, or Asmdefs only compatible with the Editor).

2023.2.XWon't FixCancelling this 2023.2 tech release issue since the support for this release has come to end of life. Cancelling this 2023.2 port case does not affect any LTS or Unity 6 Beta/Preview that remain open.

2023.1.XWon't FixThis Unity version will no longer be getting patch updates.

2022.2.XWon't FixThis Unity version will no longer be getting patch updates.

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?