Unity Issue Tracker – [Backport] [Mac] Editor crashes when importing a folder with an FBX file and its meta file where optimizeBones is set to 0

Reproduction steps:

1. Create a new project

2. Unzip and import the user’s attached “004.zip” folder

3. Observe crash

Reproducible with: 2021.3.3f1, 2022.1.1f1, 2022.2.0a9

Not reproducible with: 2022.2.0a10, 2022.2.0a13

Could not test with: 2019.4.39f1, 2020.3 (No optimizeBones flag)

Reproducible on: macOS 12.0.1

Not reproducible on: Windows 11

Note: Importing the FBX file and the meta file directly will not crash the Editor, they have to be in a folder