IDEA-42948 Idea fails to recognize "non-nullness" after unchecked cast

java/java-tests/testData/inspection/dataFlow/fixture/PreserveNullableOnUncheckedCast.java

@@ -0,0 +1,16 @@
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+public class BrokenAlignment {
+  void t() {
+    @NotNull Collection list = new ArrayList();
+    List<String> strings = (List<String>) list;
+    if (<warning descr="Condition 'strings != null' is always 'true'">strings != null</warning>) {
+      int foo = 42;
+    }
+  }
+
+}