Control Rig Creation Crash Triggered by “skel” Prefix in Skeletal Mesh Name

When generating a Control Rig from a Skeletal Mesh that contains “skel” in its name—or uses it as a prefix (i.e. skel_test)—Unreal Engine crashes.

The crash occurs both when using the native Create Control Rig button in the editor and when calling the Create Control Rig Blueprint function node.

This issue was observed in Unreal Engine 5.7; other versions have not been tested.

Steps to Reproduce

• name a skeletal mesh uasset `skel` or name it with a `skel_` prefix, i.e. 'skel_rig', 'skel_test'
• right click on the skeletal mesh -> create -> control rig
• Unreal Engine Editor will crash and close. with the pop up error 'Fatal error!'