Use of uninitialized variables in lambdas / object literals / local functions is forbidden now #KT-4475 Fixed

Local declarations CFA: variable initialization information before them is now taken into account

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

@@ -0,0 +1,8 @@
+fun foo() {
+    var x: Int
+    fun bar() {
+        x = 42
+    }
+    <!UNINITIALIZED_VARIABLE!>x<!>.hashCode()
+    bar()
+}