How to reproduce:
1. Open the attached “IN-140993” project
2. Observe the crash
Reproducible with: 6000.4.0b10, 6000.4.6f1, 6000.5.0b7, 6000.6.0a4
Not reproducible with: 6000.0.74f1, 6000.3.15f1, 6000.4.0b9
Reproduced on: macOS 26.4.1 (M4) (user reported), Windows 11
Not reproduced on: No other environment tested
Notes:
- It’s best to re-extract the project each time as the issue can be inconsistent
- The crash doesn’t occur when the Animations folder is deleted from the project before opening (Assets > Animation)
First few lines of the stack trace:
0x00007FF901CE1ECA (Unity) UserList::AddUser
0x00007FF9002CF1F5 (Unity) AnimatorStateMachine::AddUser
0x00007FF900AFD19F (Unity) AnimatorController::RebuildEditorDependencies
0x00007FF900AFCC42 (Unity) AnimatorController::InvalidateAnimatorController
0x00007FF900AF82DB (Unity) AnimatorController::AwakeFromLoad