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Created attachment 271271 [details] project demonstrating the completion issue As part of some development tooling, we create Java projects and add a jar to the project's classpath which contains repackaged classes (classes copied from other jars that have been renamed with a unique prefix, such as com.google.appengine.repackaged.XXX). As these classes are not intended to be used by users, we set access rules on the IClasspathEntry with IAccessRule.K_NON_ACCESSIBLE for "com/google/appengine/repackaged/**" to forbid references to these repackaged classes. Although this prevents the classes from being found with Open Type, Organize Imports, and Content Assist, the packages are still suggested with Content Assist. I expected that packages matching rules should not be shown. Steps to repeat: This is easily reproduced with a pure Java project referencing JUnit's jar. 1. Create a new Java project ("test-with-forbidden-packages") 2. Edit the projects Build Path and add a reference to the JUNIT_HOME/junit.jar. 3. Add an access rule on junit.jar to forbid references to org/junit/**. 4. Create a new class ("Main") with a main() method. 5. Attempt to reference org.junit.runner.Runner by typing "org.junit." and invoke Content Assist. Although the many sub-packages of org.junit.* are shown, including org.junit.runner, you cannot list any of the types contained in any of these sub packages. (I've attached a demonstration project)
