Fix missing error handling in non-CPython code.
Fix missing error handling in non-CPython code.

cython/cython,scoder/cython,cython/cython,cython/cython,scoder/cython,da-woods/cython,da-woods/cython,scoder/cython,scoder/cython,da-woods/cython,cython/cython,da-woods/cython