A couple of ctw testcases fails with an error like:

.../hotspot/test/testlibrary/ctw/src/sun/hotspot/tools/ctw/ClassPathJimageEntry.java:26: error: package jdk.internal.jimage does not exist
import jdk.internal.jimage.ImageReader;
                          ^
or:

java.lang.NoClassDefFoundError: sun/hotspot/tools/ctw/PathHandler

The later class fails to compile because of the first error.