Reproduction steps:
1. Open the attached project "CrashRepro"
2. Select “Greybox Background Shape (16)“ GameObject in the Hierarchy window
3. Right-click the “Property Block Pusher“ script component and click on “Only Clean Index“

Expected result: The script executes
Actual result: Editor crashes

Reproducible with: 6000.0.0b11, 6000.0.27f1, 6000.1.0a5
Not reproducible with: 2021.3.45f1, 2022.3.52f1, 2023.3.0b10

Reproducible on: Windows 11
Not reproducible on: No other environment tested

First few lines of stack trace:

{noformat}0x0000029A67552423 (Mono JIT Code) UnityEditor.EditorApplication:Internal_CallUpdateFunctions ()
0x00000298C11A1355 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr)
0x00007FF9D671697E (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\mini\mini-runtime.c:3445] mono_jit_runtime_invoke
0x00007FF9D6658444 (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\metadata\object.c:3068] do_runtime_invoke
0x00007FF9D6658530 (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\metadata\object.c:3115] mono_runtime_invoke {noformat}