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

compiler/testData/diagnostics/tests/controlFlowAnalysis/kt4405.kt

@@ -0,0 +1,30 @@
+//KT-4405 Control-flow analysis is not performed for some local declarations
+
+package d
+
+val closure = {
+    val <!UNUSED_VARIABLE!>x4<!> = "" // error: should be UNUSED_VARIABLE
+
+    fun g() {
+        val <!UNUSED_VARIABLE!>x6<!> = "" // error: should be UNUSED_VARIABLE
+    }
+
+    fun h(): Int { // error: should be NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY
+    <!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
+}
+
+class A {
+    {
+        fun foo(): Int {
+        <!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
+
+        val <!UNUSED_VARIABLE!>closure<!> = {
+            val <!UNUSED_VARIABLE!>x<!> = ""
+
+            fun local(): Int {
+            <!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
+        }
+
+        val <!UNUSED_VARIABLE!>y<!> = ""
+    }
+}

compiler/testData/diagnostics/tests/controlFlowAnalysis/localClasses.kt

@@ -15,7 +15,7 @@ fun f() {
 
             fun loc2(): Int {
                 val <!UNUSED_VARIABLE!>x2_<!> = "" // error: should be UNUSED_VARIABLE
-            <!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY, NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
+            <!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
         }
 
         val v: String