KT-2796 Variable name is not completed in the receiver position of a chained call

#KT-2796 Fixed

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetSimpleNameExpression.java

@@ -49,9 +49,10 @@ public class JetSimpleNameExpression extends JetReferenceExpression {
     public JetExpression getReceiverExpression() {
         PsiElement parent = getParent();
         if (parent instanceof JetQualifiedExpression && !isImportDirectiveExpression()) {
-            JetQualifiedExpression qualifiedExpression = (JetQualifiedExpression) parent;
+            JetExpression receiverExpression = ((JetQualifiedExpression) parent).getReceiverExpression();
-            if (!isFirstPartInQualifiedExpression(qualifiedExpression)) {
+            // Name expression can't be receiver for itself
-                return qualifiedExpression.getReceiverExpression();
+            if (receiverExpression != this) {
+                return receiverExpression;
             }
         }
         else if (parent instanceof JetCallExpression) {
@@ -63,18 +64,10 @@ public class JetSimpleNameExpression extends JetReferenceExpression {
                 return qualifiedExpression.getReceiverExpression();
             }
         }
+
         return null;
     }
 
-    // Check that this is simple name expression is first part in full qualified name: firstPart.otherPart.otherPart.call()
-    private boolean isFirstPartInQualifiedExpression(JetQualifiedExpression qualifiedExpression) {
-        if (qualifiedExpression.getParent() instanceof JetQualifiedExpression) {
-            return isFirstPartInQualifiedExpression((JetQualifiedExpression) qualifiedExpression.getParent());
-        }
-
-        return qualifiedExpression.getFirstChild() == this;
-    }
-
     public boolean isImportDirectiveExpression() {
         PsiElement parent = getParent();
         if (parent == null) return false;

idea/testData/completion/basic/InLongDotQualifiedExpression.kt

@@ -0,0 +1,8 @@
+// For KT-2796
+
+fun test() {
+    val bVal = 1
+    b<caret>.app().app() // b is not there
+}
+
+// EXIST: bVal

idea/tests/org/jetbrains/jet/completion/JetBasicCompletionTest.java

@@ -153,6 +153,10 @@ public class JetBasicCompletionTest extends JetCompletionTestBase {
         doTest();
     }
 
+    public void testInLongDotQualifiedExpression() {
+        doTest();
+    }
+
     public void testInMiddleOfNamespace() {
         doTest();
     }