Implement a fake "cr_frame" property for Cython async coroutines that always returns None, just to prevent an AttributeError. Closes #2000.
Implement a fake "cr_frame" property for Cython async coroutines that always returns None, just to prevent an AttributeError.
Closes #2000.

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