hg: jdk/jdk: 8211853: Avoid additional duplicate work when a reference in the task queue has already been evacuated

[thomas.schatzl at oracle.com]

Changeset: f59960ebed20
Author:    tschatzl
Date:      2018-10-22 11:51 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/f59960ebed20

8211853: Avoid additional duplicate work when a reference in the task queue has already been evacuated
Reviewed-by: kbarrett, sjohanss

! src/hotspot/share/gc/g1/g1ParScanThreadState.inline.hpp