Added tests for obsolete tasks

compiler/testData/diagnostics/testsWithStdLib/inference/kt3458.kt

@@ -0,0 +1,9 @@
+// !CHECK_TYPE
+
+import java.io.File
+
+fun test() {
+    val dir = File("dir")
+    val files = dir.listFiles()?.toList() ?: listOf() // error
+    files checkType { _<List<File>>() }
+}