Add the capability to throw and re-capture the original Python exception when thrown from the PythonVM layer (e.g. in an extension), passed through the JavaVM, and re-caught within the host PythonVM. Informally entitled as through-layer python exception support.
Work between myself and Andi Vajda has been conducted to add support for this, with the original patch being submitted on the mailing list on Friday, 4th July 2014 - The latest patch which incorporates suggested code by Andi was posted to the list on Thursday, 10th July (this patch will also be attached to this issue).
See: JCC Project Extensions email thread on the mailing list for more details.