As part of bug fix for JDK-8040129, this changeset was pushed: http://hg.openjdk.java.net/jdk9/dev/langtools/rev/5df0952dff0e

One of the test files in the above changeset do not have the @bug line along with the bug id.

This issue was caught as part of the changeset check monitoring job that is run on nightly builds.
Please update test/tools/javac/classfiles/attributes/SourceFile/NoSourceFileAttribute.java for the bug id.