Completion: for extension functions unsubstituted receiver type shown

idea/src/org/jetbrains/jet/plugin/completion/LookupElementFactory.kt

@@ -170,14 +170,14 @@ public class LookupElementFactory(
         }
 
         if (descriptor is CallableDescriptor) {
-            val receiver = descriptor.getExtensionReceiverParameter()
-            if (receiver != null) {
+            if (descriptor.getExtensionReceiverParameter() != null) {
                 val container = descriptor.getContainingDeclaration()
                 val containerPresentation = if (container is ClassDescriptor)
                     DescriptorUtils.getFqNameFromTopLevelClass(container)
                 else
                     DescriptorUtils.getFqName(container)
-                val receiverPresentation = DescriptorRenderer.SHORT_NAMES_IN_TYPES.renderType(receiver.getType())
+                val originalReceiver = descriptor.getOriginal().getExtensionReceiverParameter()!!
+                val receiverPresentation = DescriptorRenderer.SHORT_NAMES_IN_TYPES.renderType(originalReceiver.getType())
                 element = element.appendTailText(" for $receiverPresentation in $containerPresentation", true)
             }
             else {

idea/testData/completion/basic/common/SubstitutedSignature3.kt

@@ -1,5 +1,5 @@
 fun foo(list: List<String>) {
     list.<caret>
 }
-// EXIST: { itemText: "firstOrNull", tailText: "(predicate: (String) -> Boolean) for Iterable<String> in kotlin", typeText: "String?" }
-// EXIST: { itemText: "toMap", tailText: "(selector: (String) -> K) for Iterable<String> in kotlin", typeText: "Map<K, String>" }
+// EXIST: { itemText: "firstOrNull", tailText: "(predicate: (String) -> Boolean) for Iterable<T> in kotlin", typeText: "String?" }
+// EXIST: { itemText: "toMap", tailText: "(selector: (String) -> K) for Iterable<T> in kotlin", typeText: "Map<K, String>" }

idea/testData/completion/basic/common/SubstitutedSignature4.kt

@@ -10,5 +10,5 @@ class Outer : Trait<String> {
     }
 }
 
-// EXIST: { itemText: "extension", tailText: "(t: String) for Trait<String> in <root>", typeText: "String" }
-// EXIST: { itemText: "extension", tailText: "(t: Int) for Trait<Int> in <root>", typeText: "Int" }
+// EXIST: { itemText: "extension", tailText: "(t: String) for Trait<T> in <root>", typeText: "String" }
+// EXIST: { itemText: "extension", tailText: "(t: Int) for Trait<T> in <root>", typeText: "Int" }

idea/testData/completion/basic/java/ExtensionFromStandardLibrary.kt

@@ -8,5 +8,5 @@ fun firstFun() {
 }
 
 // INVOCATION_COUNT: 1
-// EXIST: { lookupString:"toLinkedList", itemText:"toLinkedList", tailText:"() for Iterable<Int!> in kotlin" }
+// EXIST: { lookupString:"toLinkedList", itemText:"toLinkedList", tailText:"() for Iterable<T> in kotlin" }
 // NUMBER: 1