Data flow information is no longer dropped while analyzing object literal expression. #KT-6293 Fixed. #KT-7110 Fixed.

A set of tests for KT-6293 / KT-7110 provided.

compiler/testData/diagnostics/tests/smartCasts/objectLiterals/exclexclTwoArgument.kt

@@ -0,0 +1,21 @@
+abstract class Runnable(val arg: Int) {
+    abstract fun run(): Int
+}
+
+interface Wrapper {
+    fun run(): Int
+}
+
+fun foo(): Int {
+    val c: Int? = null
+    val a: Int? = 1
+    if (c is Int) {
+        val k = object: Wrapper, Runnable(a!!) {
+            override fun run() = arg
+        }
+        k.run()
+        val d: Int = <!DEBUG_INFO_SMARTCAST!>c<!>
+        return <!DEBUG_INFO_SMARTCAST!>a<!> + d
+    }
+    else return -1
+}