Grouped armature crashes the BGE on startup

This is a weird bug. I have an armature, and it crashes when using BGE every time. Is there any workaround to this glitch?
This only happens when duplicating grouped objects. It seems to be complex objects. I am also using a libLoad script for Monster’s buoyancy script.

Blender version: 2.79
OS: Mac OS X 10.6.8

The Terminal says that it writes the blender file crash text as usual, and then says “Segmentation Fault”.

Bizarre as!

you may want to try the same thing in upbge ge_23a_branch