Pass some more tests

Cython/Compiler/CythonScope.py

@@ -22,6 +22,8 @@ class CythonScope(ModuleScope):
         if type:
             return type
 
+        return super(CythonScope, self).lookup_type(name)
+
 def create_cython_scope(context):
     create_utility_scope(context)
     return CythonScope(context)

Cython/Compiler/Nodes.py

@@ -3823,6 +3823,7 @@ class SingleAssignmentNode(AssignmentNode):
 
                     # See if we're dealing with this:
                     #     dtype = cython.typedef(cython.fused_type(...))
+                    if isinstance(args[0], ExprNodes.SimpleCallNode):
                         nested_func_name = args[0].function.as_cython_attribute()
                         if nested_func_name == u'fused_type':
                             nested_args, nested_kwds = args[0].explicit_args_kwds()

Cython/Compiler/TypeInference.py

@@ -270,7 +270,7 @@ class SimpleAssignmentTypeInferer(object):
             while ready_to_infer:
                 entry = ready_to_infer.pop()
                 types = [expr.infer_type(scope) for expr in entry.assignments]
-                if Utils.all(types):
+                if types and Utils.all(types):
                     entry.type = spanning_type(types, entry.might_overflow)
                 else:
                     # FIXME: raise a warning?