KT-4405 Control-flow analysis is not performed for some local declarations #KT-4405 Fixed

compiler/testData/diagnostics/tests/backingField/ReadForwardInAnonymous.kt

@@ -1,6 +1,6 @@
 class ReadForward() {
     {
-        val x = <!UNINITIALIZED_VARIABLE!>$a<!>
+        val <!UNUSED_VARIABLE!>x<!> = <!UNINITIALIZED_VARIABLE!>$a<!>
     }
 
     val a = 1

compiler/testData/diagnostics/tests/backingField/ReadInAnonymous.kt

@@ -1,6 +1,6 @@
 class ReadByAnotherPropertyInitializer() {
     val a = 1
     {
-        val x = $a
+        val <!UNUSED_VARIABLE!>x<!> = $a
     }
 }

compiler/testData/diagnostics/tests/backingField/ReadNonexistentAbstractPropertyInAnonymous.kt

@@ -2,6 +2,6 @@ abstract class ReadNonexistent() {
     abstract val aa: Int
     
     {
-        val x = <!NO_BACKING_FIELD_ABSTRACT_PROPERTY!>$aa<!>
+        val <!UNUSED_VARIABLE!>x<!> = <!NO_BACKING_FIELD_ABSTRACT_PROPERTY!>$aa<!>
     }
 }

compiler/testData/diagnostics/tests/backingField/ReadNonexistentCustomGetInAnonymous.kt

@@ -3,6 +3,6 @@ class ReadNonexistent() {
         get() = 1
 
     {
-        val x = <!NO_BACKING_FIELD_CUSTOM_ACCESSORS!>$a<!>
+        val <!UNUSED_VARIABLE!>x<!> = <!NO_BACKING_FIELD_CUSTOM_ACCESSORS!>$a<!>
     }
 }

compiler/testData/diagnostics/tests/backingField/ReadNonexistentPropertyInAnonymous.kt

@@ -1,5 +1,5 @@
 class Cl() {
     {
-        val x = <!UNRESOLVED_REFERENCE!>$a<!>
+        val <!UNUSED_VARIABLE!>x<!> = <!UNRESOLVED_REFERENCE!>$a<!>
     }
 }