Prevent Python call with exception set in __Pyx_AddTraceback() (GH-4723)
Prevent Python call with exception set in __Pyx_AddTraceback() (GH-4723)

Closes https://github.com/cython/cython/issues/4722
scoder/cython,da-woods/cython,da-woods/cython,cython/cython,cython/cython,cython/cython,da-woods/cython,scoder/cython,da-woods/cython,scoder/cython,cython/cython,scoder/cython