Nightly testing failure:

[2017-01-21T06:31:25.77] # To suppress the following error report, specify this argument
[2017-01-21T06:31:25.77] # after -XX: or in .hotspotrc: SuppressErrorAt=/heapRegionRemSet.cpp:923
[2017-01-21T06:31:25.77] #
[2017-01-21T06:31:25.77] # A fatal error has been detected by the Java Runtime Environment:
[2017-01-21T06:31:25.77] #
[2017-01-21T06:31:25.77] # Internal Error (/scratch/opt/jprt/T/P1/212343.hseigel/s/hotspot/src/share/vm/gc/g1/heapRegionRemSet.cpp:923), pid=1730, tid=1740
[2017-01-21T06:31:25.77] # assert(ParallelGCThreads > 1 || n_yielded() == _hrrs->occupied()) failed: Should have yielded all the cards in the rem set (in the non-par case).
[2017-01-21T06:31:25.77] #
[2017-01-21T06:31:25.77] # JRE version: Java(TM) SE Runtime Environment (9.0) (fastdebug build 9-internal+0-2017-01-20-212343.hseigel.bug8171971)
[2017-01-21T06:31:25.77] # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 9-internal+0-2017-01-20-212343.hseigel.bug8171971, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
[2017-01-21T06:31:25.77] # Core dump will be written. Default location: Core dumps may be processed with "/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t e" (or dumping to /scratch/home/aginfra/sandbox/results/ResultDir/Combination05/core.1730)
[2017-01-21T06:31:25.77] #