Don't resolve attributes of metaclasses on instances of their instances

python/src/com/jetbrains/python/psi/types/PyClassTypeImpl.java

@@ -196,6 +196,9 @@ public class PyClassTypeImpl extends UserDataHolderBase implements PyClassType {
     if (inherited) {
       for (PyClassLikeType type : myClass.getAncestorTypes(context)) {
         if (type instanceof PyClassType) {
+          if (!myIsDefinition) {
+            type = type.toInstance();
+          }
           PsiElement superMember = resolveClassMember(((PyClassType)type).getPyClass(), myIsDefinition, name, null);
           if (superMember != null) {
             return ResolveResultList.to(superMember);

python/testData/inspections/PyUnresolvedReferencesInspection/metaClassMembers.py

@@ -0,0 +1,16 @@
+class GenericMeta(type):
+    def __getitem__(self, args):
+        pass
+
+
+class Generic(object):
+    __metaclass__ = GenericMeta
+
+
+class C(Generic['foo']):
+    pass
+
+
+print(C['bar'])
+c = C()
+print(c<warning descr="Class 'C' does not define '__getitem__', so the '[]' operator cannot be used on its instances">[</warning>'baz'])

python/testSrc/com/jetbrains/python/inspections/PyUnresolvedReferencesInspectionTest.java

@@ -431,6 +431,10 @@ public class PyUnresolvedReferencesInspectionTest extends PyInspectionTestCase {
     assertTrue(JDOMUtil.writeElement(serialized).contains("foo.Bar.*"));
   }
 
+  public void testMetaClassMembers() {
+    doTest();
+  }
+
   @NotNull
   @Override
   protected Class<? extends PyInspection> getInspectionClass() {