Fixed KT-6890 No autocomplete for receiver methods and properties in extension property

#KT-6890 Fixed

idea/ide-common/src/org/jetbrains/kotlin/idea/util/implicitReceiversUtils.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.idea.util
 
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.PropertyAccessorDescriptor
 import org.jetbrains.kotlin.descriptors.ReceiverParameterDescriptor
 import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.scopes.JetScope
@@ -31,9 +32,14 @@ public fun JetScope.getImplicitReceiversWithInstance(): List<ReceiverParameterDe
     val withInstance = HashSet<DeclarationDescriptor>()
     var current: DeclarationDescriptor? = getContainingDeclaration()
     while (current != null) {
+        if (current is PropertyAccessorDescriptor) {
+            current =  (current as PropertyAccessorDescriptor).getCorrespondingProperty()
+        }
         withInstance.add(current)
+
         val classDescriptor = current as? ClassDescriptor
         if (classDescriptor != null && !classDescriptor.isInner() && !DescriptorUtils.isLocal(classDescriptor)) break
+
         current = current!!.getContainingDeclaration()
     }
 

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

@@ -0,0 +1,12 @@
+class A {
+    public fun foo(): Int = 1
+    public val bar: Int = 1
+}
+
+val A.abc: Int
+    get() {
+        <caret>
+    }
+
+// EXIST: foo
+// EXIST: bar

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

@@ -0,0 +1,11 @@
+class A {
+    public fun foo(): Int = 1
+    public val bar: Int = 1
+}
+
+fun A.ext() {
+    <caret>
+}
+
+// EXIST: foo
+// EXIST: bar

idea/tests/org/jetbrains/kotlin/completion/JSBasicCompletionTestGenerated.java

@@ -823,6 +823,18 @@ public class JSBasicCompletionTestGenerated extends AbstractJSBasicCompletionTes
             doTest(fileName);
         }
 
+        @TestMetadata("RecieverMembersFromExtAccessor.kt")
+        public void testRecieverMembersFromExtAccessor() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/basic/common/RecieverMembersFromExtAccessor.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("RecieverMembersFromExtFun.kt")
+        public void testRecieverMembersFromExtFun() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/basic/common/RecieverMembersFromExtFun.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("SafeCallAfterNullable.kt")
         public void testSafeCallAfterNullable() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/basic/common/SafeCallAfterNullable.kt");

idea/tests/org/jetbrains/kotlin/completion/JvmBasicCompletionTestGenerated.java

@@ -823,6 +823,18 @@ public class JvmBasicCompletionTestGenerated extends AbstractJvmBasicCompletionT
             doTest(fileName);
         }
 
+        @TestMetadata("RecieverMembersFromExtAccessor.kt")
+        public void testRecieverMembersFromExtAccessor() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/basic/common/RecieverMembersFromExtAccessor.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("RecieverMembersFromExtFun.kt")
+        public void testRecieverMembersFromExtFun() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/basic/common/RecieverMembersFromExtFun.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("SafeCallAfterNullable.kt")
         public void testSafeCallAfterNullable() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/completion/basic/common/SafeCallAfterNullable.kt");