While trying to reproduce bug #214863, I have found to other problems:
Here is what I tried (finding two other problems along the way) - only on Linux
-created a project, added a directory with some .class files on its classpath.
-tried to delete the directory (bug: the error badges did not appear
-tried to copy the class file back. The error badges disappeared almost
immediately. Bug: the errors in an opened files did not until a reparse of the
file in the editor was forced.
-tried to also copy the classfiles again to see if there is a problem with
Integrated into 'main-golden', will be available in build *201207040002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Jan Lahoda <firstname.lastname@example.org>
Log: #215109: fixing analysis after classfiles are deleted from a classpath folder, or after the classpath folder is deleted.
Fix for the second problem: