RFR: 8236691: JFR: assert((((((klass)->trace_id()) & ((JfrTraceIdEpoch::method_and_class_in_use_this_epoch_bits()))) != 0))) failed: invariant

[Erik Gahlin]

Hi,

Could I have a review of this fix.

Webrev:
http://cr.openjdk.java.net/~egahlin/8236691/

Bug:
https://bugs.openjdk.java.net/browse/JDK-8236691

Testing:
tier1, tier2 + jdk/jdk/jfr

Thanks
Erik