SynchronizationBarrier.removeProcessor assertion failure

The exception that is displayed is as follows;

Died in GC:
vm internal error at:

– Stack –
at [0x6701b85c] Lorg/jikesrvm/VM; _assertionFailure(Ljava/lang/String;Ljava/lang/String;)V at line 538
at [0x6701b874] Lorg/jikesrvm/VM; _assert(ZLjava/lang/String;Ljava/lang/String;)V at line 521
at [0x6701b890] Lorg/jikesrvm/VM; _assert(Z)V at line 499
at [0x6701b8c4] Lorg/jikesrvm/memorymanagers/mminterface/SynchronizationBarrier; removeProcessor(I)V at line 173
at [0x6701b904] Lorg/jikesrvm/memorymanagers/mminterface/SynchronizationBarrier; startupRendezvous()V at line 103
at [0x6701b93c] Lorg/jikesrvm/memorymanagers/mminterface/VM_CollectorThread; run()V at line 374
at [0x6701b964] Lorg/jikesrvm/scheduler/VM_Thread; startoff()V at line 606

Full output is available at

http://jikesrvm.anu.edu.au/cattrack/results/rvmx86lnx32.anu.edu.au/commit.650/development/default/dacapo/xalan/Output.txt