TestSerialVersionUID.java intermittently fails

langtools/test/jdk/javadoc/doclet/testSerialVersionUID/TestSerialVersionUID.java failed due to javadoc: error - jdk.javadoc.internal.doclets.toolkit.util.DocletAbortException: java.lang.AssertionError

the test failed w/ '-Xcomp -server -ea -esa -XX:+CreateCoredumpOnCrash -XX:+IgnoreUnrecognizedVMOptions -XX:ReservedCodeCacheSize=256M'

----------System.out:(25/957)----------
Running test test
Running javadoc...
args: [-d, out, /scratch/local/aurora/CommonData/j2se_jdk/langtools/test/jdk/javadoc/doclet/testSerialVersionUID/C.java]
javadoc OUT:
Loading source file /scratch/local/aurora/CommonData/j2se_jdk/langtools/test/jdk/javadoc/doclet/testSerialVersionUID/C.java...
Constructing Javadoc information...
Creating destination directory: "out/"
Standard Doclet (Next) version 9-ea
Building tree for all the packages and classes...
Generating out/C.html...
Generating out/package-frame.html...
Generating out/package-summary.html...
Generating out/package-tree.html...
Generating out/constant-values.html...
Generating out/serialized-form.html...
javadoc: error - jdk.javadoc.internal.doclets.toolkit.util.DocletAbortException: java.lang.AssertionError
1 error

Starting subtest 1: check exit code
FAILED: return code 1; expected 0 (OK)
Starting subtest 2: checkOutput
FAILED: serialized-form.html: not found:
-111111111111111L