hseigel [Tue, 08 Aug 2017 08:41:36 -0400] rev 46772
8185103: TestThreadDumpMonitorContention.java crashed due to SIGSEGV in G1SATBCardTableModRefBS::write_ref_field_pre_work
Summary: Ensure that a Klass's mirror is set before putting the Klass on the fixup_module_field_list
Reviewed-by: coleenp, dholmes, gtriantafill