Test disabling of tracing returning None from trace function
Test disabling of tracing returning None from trace function

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