If the MatrixInverse function is used on a symbol which has not been defined as a tensor, then it will cause Mathematica to segfault. I encountered this problem with version 8.0.4 of Mathematica using:
MatrixInverse[g[ua,ub]]
This sounds like a Mathematica bug, but should probably be worked around anyway to provide a better error message.
If the MatrixInverse function is used on a symbol which has not been defined as a tensor, then it will cause Mathematica to segfault. I encountered this problem with version 8.0.4 of Mathematica using:
MatrixInverse[g[ua,ub]]
This sounds like a Mathematica bug, but should probably be worked around anyway to provide a better error message.