good point. I guess it's early ;-)
ORA-07445: exception encountered: core dump [ltxvmUnion()+282] [SIGSEGV] [Address not mapped to object] [0x000000000]  
that's more useful
(it hits the bogus address in many places at different times, it's always a segfault though)
Exception signal: 11 (SIGSEGV), code: 1 (Address not mapped to object), addr: 0x0, PC: [0x35e5e2e, ltxvmUnion()+282]
oracle is weird.. the rest of the world calls that a 'null pointer dereference'