Heads-up: guarantee(obj->mark() == markOopDesc::encode(mid)) failed

[Aleksey Shipilev]

On 06/13/2017 07:58 PM, Roman Kennke wrote:
> Double pass over the monitors, once for update, once for evac? Or maybe once in
> SP cleanup and once for evac?

Thought so too, but logging seems to tell we only pass once. But, there seems to
be RevokeBias shortly before the failure:
  http://cr.openjdk.java.net/~shade/shenandoah/crashes/weakref-mergedsp/crash.log

FTR, the tracing patch:

http://cr.openjdk.java.net/~shade/shenandoah/crashes/weakref-mergedsp/traces-1.patch

-Aleksey