How to reproduce:
1. Open the attached “IN-114094.zip” project
2. Open the “ExportedProject/Assets/Scenes/GameScene”
3. Enter Play Mode
4. Observe the crash

Reproducible in: 6000.1.0a2, 6000.2.7f2, 6000.3.0b5, 6000.4.0a2
Not reproducible in: 6000.0.59f1, 6000.1.0a1

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

First few lines of stacktrace:

{noformat}0x00007FFBEA2D752D (Unity) mecanim::skeleton::SkeletonSetDoF
0x00007FFBEA2C57C7 (Unity) mecanim::human::Human2SkeletonPose
0x00007FFBEA2D1495 (Unity) mecanim::human::RetargetTo
0x00007FFBEA2B4037 (Unity) mecanim::animation::EvaluateAvatarRetarget{noformat}