See 6840775.
After fix applied, the test case still failed:
  [7] __sighndlr(0xb, 0xffffffff768ff140, 0xffffffff768fee60, 0xffffffff7ddf6cf8, 0x0, 0xa), at 0xffffffff7edd418c
  ---- called from signal handler with signal 11 (SIGSEGV) ------
  [8] CompactibleFreeListSpace::block_size(0x4c2a8, 0xffffffff7e72ce38, 0x6ac00, 0xffffffff7e6c2000, 0x715b64, 0x4c000), at 0xffffffff7dfac4e0
=>[9] BlockOffsetArrayNonContigSpace::block_start_unsafe(0x10000ff6f5de398, 0xffffffff6d7e0000, 0x10045a418, 0xffffffff75500000, 0xffffffff6d7de000, 0xffffffff7e6c2000), at 0xffffffff7df4e44c
  [10] CardTableModRefBS::process_chunk_boundaries(0x100136cf0, 0x10045a3a0, 0x10012be10, 0xffffffff6d7e0000, 0xffffffff7dfb34d8, 0x1011544a0), at 0xffffffff7e301a90
  [11] CardTableModRefBS::par_non_clean_card_iterate_work(0x100136cf0, 0xffffffff6d7c0000, 0xffffffff7bc2511d, 0x32, 0x0, 0x3200), at 0xffffffff7e301770
  [12] CardTableModRefBS::non_clean_card_iterate(0x100136cf0, 0x10045a3a0, 0xffffffff768ff810, 0x10012be10, 0xffffffff768ff820, 0xffffffff6b4c0000), at 0xffffffff7df57054
  [13] CardTableRS::younger_refs_in_space_iterate(0x1001108f0, 0x10045a3a0, 0xffffffff7dfabbb0, 0xffffffff7e7055e0, 0x7698fc, 0xffffffff7e6c2000), at 0xffffffff7df5879c
  [14] ConcurrentMarkSweepGeneration::younger_refs_iterate(0x1001187d0, 0x1001108f0, 0xffffffff6b4c0000, 0x6ea800, 0xffffffff7dfd74d8, 0x10161a880), at 0xffffffff7dfd7528
  [15] GenCollectedHeap::gen_process_strong_roots(0x1001191d0, 0x2, 0x1, 0x0, 0x100119260, 0x10161a880), at 0xffffffff7e078b08
  [16] ParNewGenTask::work(0xffffffff74bff370, 0x2, 0x10011be80, 0x10161a6f0, 0x0, 0x10012bfc8), at 0xffffffff7e305164
  [17] GangWorker::loop(0x10012ba30, 0x3, 0xffffffff7e41ca90, 0x100119340, 0x1afaec, 0x2), at 0xffffffff7e41cb10
  [18] java_start(0x10012ba30, 0x1d71, 0xffffffff7e723d14, 0xffffffff7e6c2000, 0xffffffff7e512b4f, 0xffffffff7e73bc94), at 0xffffffff7e2f2a30
Modified synopsis verbage.