From 5d021fdd1785f183686204406c8cf64702a00d67 Mon Sep 17 00:00:00 2001
From: "Ilya.Kazakevich" <Ilya.Kazakevich@jetbrains.com>
Date: Sat, 28 Jan 2017 01:08:52 +0300
Subject: [PATCH] PY-22401: Infinite loop fixed for cases when element can't be
 resolved

* PyQualifiedName::removeLastElement() does not change instance ,
it just creates new instance leaving former unchanged. So,
currentName was always "initialName - 1 component"
---
 python/src/com/jetbrains/extenstions/QualifiedNameExt.kt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/python/src/com/jetbrains/extenstions/QualifiedNameExt.kt b/python/src/com/jetbrains/extenstions/QualifiedNameExt.kt
index 51dbfa17128f..2926732b4b77 100644
--- a/python/src/com/jetbrains/extenstions/QualifiedNameExt.kt
+++ b/python/src/com/jetbrains/extenstions/QualifiedNameExt.kt
@@ -27,7 +27,7 @@ import com.jetbrains.python.psi.types.TypeEvalContext
  */
 fun QualifiedName.toElement(module: Module, context: TypeEvalContext): PsiElement? {
   val facade = PyPsiFacadeImpl.getInstance(module.project)
-  var currentName = this
+  var currentName = QualifiedName.fromComponents(this.components)
 
 
   var element: PsiElement? = null
@@ -40,8 +40,8 @@ fun QualifiedName.toElement(module: Module, context: TypeEvalContext): PsiElemen
     if (element != null) {
       break
     }
-    lastElement = this.lastComponent!!
-    currentName = this.removeLastComponent()
+    lastElement = currentName.lastComponent!!
+    currentName = currentName.removeLastComponent()
   }
 
   if (lastElement != null && element is PyClass) {