diff -r 88502b1cf76f -r 7799a51dbe30 test/langtools/tools/javac/patterns/EnsureTypesOrderTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/patterns/EnsureTypesOrderTest.java	Wed Nov 27 09:00:01 2019 +0100
@@ -0,0 +1,13 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8187420 8231827
+ * @summary Error message mentions relevant types transposed
+ * @compile/fail/ref=EnsureTypesOrderTest.out -XDrawDiagnostics --enable-preview -source ${jdk.version} EnsureTypesOrderTest.java
+ */
+public class EnsureTypesOrderTest {
+    public static void main(String [] args) {
+        if (args instanceof String s) {
+            System.out.println("Broken");
+        }
+    }
+}