This issue was caused by the upload of Ant 1.9.8. In this version the
systemClasspath field in the Path class was made final , and the
InternalAntRunner class in Eclipse attempts to modify it , leading to
the IllegalAccessError that can be seen in the .metadata/.log file.
Most eclipse based packages are potentially affected.
I plan to revert the modification in Ant and make the field non final.
This is the maintainer address of Debian's Java team
debian-j...@lists.debian.org for discussions and questions.