--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Type.java	Thu Nov 08 23:31:08 2018 +0100
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Type.java	Thu Nov 08 18:23:52 2018 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -2020,6 +2020,7 @@
             for (IncorporationAction action : incorporationActions) {
                 uv2.incorporationActions.add(action.dup(uv2));
             }
+            uv2.kind = kind;
         }
 
         @Override

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/T8211450/ThrownTypeVarTest.java	Thu Nov 08 18:23:52 2018 -0500
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8211450
+ * @summary UndetVar::dup is not copying the kind field to the duplicated instance
+ * @compile ThrownTypeVarTest.java
+ */
+
+import java.io.*;
+
+public class ThrownTypeVarTest {
+    void repro() throws IOException {
+        when(f(any()));
+    }
+
+    interface MyInt<T1, E1 extends Exception> {}
+
+    <T2, E2 extends Exception> T2 f(MyInt<T2, E2> g) throws IOException, E2 {
+        return null;
+    }
+
+    static <T3> T3 any() {
+        return null;
+    }
+
+    static <T4> void when(T4 methodCall) {}
+}