ScriptEngineTest.java fails with compilation error when running under jtreg

cd $jdk/nashorn
jtreg -jdk:<jdk8-home> ./test

----------messages:(3/329)----------
command: build jdk.nashorn.api.scripting.Window jdk.nashorn.api.scripting.WindowEventHandler jdk.nashorn.api.scripting.ScriptEngineTest
reason: User specified action: run build jdk.nashorn.api.scripting.Window jdk.nashorn.api.scripting.WindowEventHandler jdk.nashorn.api.scripting.ScriptEngineTest
elapsed time (seconds): 2.026
result: Failed. Compilation failed: Compilation failed

#section:compile
----------messages:(3/374)----------
command: compile /home/sundar/src/nashorn-jdk8/nashorn/test/src/jdk/nashorn/api/scripting/Window.java /home/sundar/src/nashorn-jdk8/nashorn/test/src/jdk/nashorn/api/scripting/WindowEventHandler.java /home/sundar/src/nashorn-jdk8/nashorn/test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java
reason: .class file out of date or does not exist
elapsed time (seconds): 2.025
----------System.out:(0/0)----------
----------System.err:(11/734)----------
/home/sundar/src/nashorn-jdk8/nashorn/test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java:927: error: cannot find symbol
        final VariableArityTestInterface itf = ((Invocable)e).getInterface(VariableArityTestInterface.class);
              ^
  symbol: class VariableArityTestInterface
  location: class ScriptEngineTest
/home/sundar/src/nashorn-jdk8/nashorn/test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java:927: error: cannot find symbol
        final VariableArityTestInterface itf = ((Invocable)e).getInterface(VariableArityTestInterface.class);
                                                                           ^
  symbol: class VariableArityTestInterface
  location: class ScriptEngineTest
2 errors
result: Failed. Compilation failed: Compilation failed


test result: Failed. Compilation failed: Compilation failed