Message 372556 - Python tracker
I understand that Python 3.5, 3.6 and 3.7 are also affected. It's not a regression. On Python 3.5, 3.6 and 3.7, when Py_SetPath(path) is called, Py_GetPrefix() also returns an empty path. So at least the directory based on Py_GetPrefix() should also be skipped on Python 3.5-3.7 if Py_GetPrefix() is empty, right?