From 8678782c6569d213e3ab216c78c5e15a2bd3e792 Mon Sep 17 00:00:00 2001
From: Semyon Proshev <Semyon.Proshev@jetbrains.com>
Date: Mon, 11 Dec 2017 15:02:32 +0300
Subject: [PATCH] Ignore `__getitem__` for `Generic` indirect inheritors
 (PY-27102)

---
 .../typing/PyTypingInspectionExtension.kt     |  2 +-
 .../typingGenericIndirectInheritorGetItem.py  | 19 +++++++++++++++++++
 ...Py3UnresolvedReferencesInspectionTest.java |  5 +++++
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 python/testData/inspections/PyUnresolvedReferencesInspection3K/typingGenericIndirectInheritorGetItem.py

diff --git a/python/src/com/jetbrains/python/codeInsight/typing/PyTypingInspectionExtension.kt b/python/src/com/jetbrains/python/codeInsight/typing/PyTypingInspectionExtension.kt
index 938498a6edfb..01c4e61997a1 100644
--- a/python/src/com/jetbrains/python/codeInsight/typing/PyTypingInspectionExtension.kt
+++ b/python/src/com/jetbrains/python/codeInsight/typing/PyTypingInspectionExtension.kt
@@ -36,7 +36,7 @@ class PyTypingInspectionExtension : PyInspectionExtension() {
   private fun isGenericItselfOrDescendant(type: PyClassLikeType,
                                           context: TypeEvalContext): Boolean {
     return PyTypingTypeProvider.GENERIC_CLASSES.contains(type.classQName) ||
-           type.getSuperClassTypes(context).any { PyTypingTypeProvider.GENERIC_CLASSES.contains(it.classQName) }
+           type.getAncestorTypes(context).any { PyTypingTypeProvider.GENERIC_CLASSES.contains(it.classQName) }
   }
 
   private fun isBuiltin(type: PyClassLikeType): Boolean {
diff --git a/python/testData/inspections/PyUnresolvedReferencesInspection3K/typingGenericIndirectInheritorGetItem.py b/python/testData/inspections/PyUnresolvedReferencesInspection3K/typingGenericIndirectInheritorGetItem.py
new file mode 100644
index 000000000000..9ac4f278ea56
--- /dev/null
+++ b/python/testData/inspections/PyUnresolvedReferencesInspection3K/typingGenericIndirectInheritorGetItem.py
@@ -0,0 +1,19 @@
+import typing
+
+
+T = typing.TypeVar('T')
+
+
+class X(typing.Generic[T]):
+    pass
+
+
+class Y(X[T]):
+    pass
+
+
+class Z(Y[T]):
+    pass
+
+
+Z[int]
\ No newline at end of file
diff --git a/python/testSrc/com/jetbrains/python/inspections/Py3UnresolvedReferencesInspectionTest.java b/python/testSrc/com/jetbrains/python/inspections/Py3UnresolvedReferencesInspectionTest.java
index a789363f4d20..e3d3a7763ce7 100644
--- a/python/testSrc/com/jetbrains/python/inspections/Py3UnresolvedReferencesInspectionTest.java
+++ b/python/testSrc/com/jetbrains/python/inspections/Py3UnresolvedReferencesInspectionTest.java
@@ -215,6 +215,11 @@ public class Py3UnresolvedReferencesInspectionTest extends PyInspectionTestCase
     doTest();
   }
 
+  // PY-27102
+  public void testTypingGenericIndirectInheritorGetItem() {
+    doTest();
+  }
+
   // PY-21655
   public void testUsageOfFunctionDecoratedWithAsyncioCoroutine() {
     doMultiFileTest("a.py");