fix sharing of Generator type across modules

CHANGES.rst

@@ -14,6 +14,8 @@ Bugs fixed
 * Tracing exception handling code could enter the trace function with an active
   exception set.
 
+* The internal generator function type was not shared across modules.
+
 * Comparisons of (inferred) ctuples failed to compile.
 
 * Using ``const`` C++ references in intermediate parts of longer expressions

Cython/Utility/Generator.c

@@ -703,7 +703,7 @@ static PyTypeObject __pyx_GeneratorType_type = {
 static __pyx_GeneratorObject *__Pyx_Generator_New(__pyx_generator_body_t body,
                                                   PyObject *closure, PyObject *name, PyObject *qualname) {
     __pyx_GeneratorObject *gen =
-        PyObject_GC_New(__pyx_GeneratorObject, &__pyx_GeneratorType_type);
+        PyObject_GC_New(__pyx_GeneratorObject, __pyx_GeneratorType);
 
     if (gen == NULL)
         return NULL;