KT-1191 Wrong detection of unused parameters

KT-1219 Incorrect 'unused value' error in closures

compiler/testData/diagnostics/tests/controlFlowAnalysis/kt1191.jet

@@ -0,0 +1,21 @@
+//KT-1191 Wrong detection of unused parameters
+package kt1191
+
+trait FunctionalList<T> {
+    val size: Int
+    val head: T
+    val tail: FunctionalList<T>
+}
+
+fun <erased T> FunctionalList<T>.plus(element: T) : FunctionalList<T> = object: FunctionalList<T> {
+    override val size: Int
+    get() = 1 + this@plus.size
+    override val tail: FunctionalList<T>
+    get() = this@plus
+    override val head: T
+    get() = element
+}
+
+fun foo(unused: Int) = object {
+    val a : Int get() = unused
+}

compiler/testData/diagnostics/tests/controlFlowAnalysis/kt1219.1301.jet

@@ -0,0 +1,25 @@
+//KT-1219 Incorrect 'unused value' error in closures
+//+JDK
+
+package kt1219
+
+fun <T, R> Iterable<T>.fold(var r: R, op: (T, R) -> R) : R {
+    this.foreach { r = op(it, r) } //unused value here
+    return r
+}
+
+//KT-1301 Modification of local of outer function in a local function should not be marked as unused assignment
+fun foo(){
+    var local = 0
+    fun bar(){
+        local = 1
+    }
+
+    bar()
+    System.out?.println(local)
+}
+
+fun <T> Iterable<T>.foreach(operation: (element: T) -> Unit) {
+  for (elem in this)
+    operation(elem)
+}