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/kt7110.kt

@@ -0,0 +1,11 @@
+//  Anonymous object's initialization does not affect smart casts
+
+abstract class A(val s: String) {
+    fun bar(): String = s
+}
+
+fun foo(o: String?): Int {
+    val a = object : A(o!!){}
+    a.bar()
+    return <!DEBUG_INFO_SMARTCAST!>o<!>.length()
+}