Implicit exhaustive whens now have exception in else branch #KT-8700 Fixed

compiler/testData/codegen/boxWithStdlib/when/exhaustiveBreakContinue.kt

@@ -0,0 +1,14 @@
+enum class Color { RED, GREEN, BLUE }
+
+fun foo(arr: Array<Color>): Color {
+    loop@ for (color in arr) {
+        when (color) {
+            Color.RED -> return color
+            Color.GREEN -> break@loop
+            Color.BLUE -> if (arr.size == 1) return color else continue@loop
+        }
+    }
+    return Color.GREEN
+}
+
+fun box() = if (foo(arrayOf(Color.BLUE, Color.GREEN)) == Color.GREEN) "OK" else "FAIL"