C2 Compiler crash possibly caused by related to 6809798 fixed in 6u18.

Input from engineering:
This is definitely a C2 compiler problem. It looks related to bug 6809798 which is fixed in jdk6u18 (which is the version used here). It could be another issue in same area, need core file for detail.

Core file/pkgapp output in /cores2/3-2554138554