Handle the case where someone has made `import weakref` return a weird proxy.alex_gaynor/handle-the-case-where-someone-has-made-i-1391634819444

Fixes: https://bugs.pypy.org/issue1688

1 files changed, 3 insertions, 2 deletions

diff --git a/cffi/model.py b/cffi/model.py
index d348be9..371153f 100644
--- a/cffi/model.py
+++ b/cffi/model.py
@@ -1,4 +1,6 @@
+import types
 import weakref
+
 from .lock import allocate_lock
 
 
@@ -469,8 +471,7 @@ def global_cache(srctype, ffi, funcname, *args, **kwds):
         # initialize the __typecache attribute, either at the module level
         # if ffi._backend is a module, or at the class level if ffi._backend
         # is some instance.
-        ModuleType = type(weakref)
-        if isinstance(ffi._backend, ModuleType):
+        if isinstance(ffi._backend, types.ModuleType):
             ffi._backend.__typecache = weakref.WeakValueDictionary()
         else:
             type(ffi._backend).__typecache = weakref.WeakValueDictionary()