Fix passing Python classes through "cython.inline()".

Closes GH-2936.

CHANGES.rst

@@ -18,6 +18,9 @@ Bugs fixed
 * Starred expressions in %-formatting tuples could fail to compile for
   unicode strings.  (Github issue #2939)
 
+* Passing Python class references through ``cython.inline()`` was broken.
+  (Github issue #2936)
+
 
 0.29.7 (2019-04-14)
 ===================

Cython/Build/Inline.py

@@ -90,7 +90,7 @@ def safe_type(arg, context=None):
     elif 'numpy' in sys.modules and isinstance(arg, sys.modules['numpy'].ndarray):
         return 'numpy.ndarray[numpy.%s_t, ndim=%s]' % (arg.dtype.name, arg.ndim)
     else:
-        for base_type in py_type.mro():
+        for base_type in py_type.__mro__:
             if base_type.__module__ in ('__builtin__', 'builtins'):
                 return 'object'
             module = context.find_module(base_type.__module__, need_pxd=False)

Cython/Build/Tests/TestInline.py

@@ -51,6 +51,12 @@ class TestInline(CythonTest):
         foo = inline("def foo(x): return x * x", **self.test_kwds)['foo']
         self.assertEquals(foo(7), 49)
 
+    def test_class_ref(self):
+        class Type(object):
+            pass
+        tp = inline("Type")['Type']
+        self.assertEqual(tp, Type)
+
     def test_pure(self):
         import cython as cy
         b = inline("""