It seems, my fix for 6716441 was not complete.

nsk/stress/jck60/jck60016

=== Meet Not Symmetric ===
VM option '-PrintVMOptions'
VM option 'CompileThreshold=100'
t = java/util/HashMap:AnyNull:exact *,iid=108
this= java/util/LinkedHashMap:AnyNull:exact *,iid=top
mt=(t meet this)= java/util/HashMap:NotNull:exact *,iid=108
t_dual= java/util/HashMap:NotNull:exact *,iid=108
this_dual= java/util/LinkedHashMap:NotNull:exact *
mt_dual= java/util/HashMap:AnyNull:exact *,iid=108
mt_dual meet t_dual= java/util/HashMap:NotNull:exact *,iid=108
mt_dual meet this_dual= java/util/HashMap:NotNull *
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/tmp/jprt-jprtadm/temp/P1/B/010325.kvn/source/src/share/vm/opto/type.cpp:531), pid=25461, tid=7
# Error: meet not symmetric
#
# Java VM: OpenJDK 64-Bit Server VM (14.0-b01-2008-07-04-010325.kvn.6684714-last-fastdebug compiled mode solaris-sparc )
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x0000000100265000): JavaThread "CompilerThread0" daemon [_thread_in_native, id=7, stack(0xffffffff6ba00000,0xffffffff6bb00000)]

Stack: [0xffffffff6ba00000,0xffffffff6bb00000], sp=0xffffffff6baf87d0, free space=993k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1243544];; __1cHVMErrorOreport_and_die6M_v_+0x804
V [libjvm.so+0x56381c];; __1cMreport_fatal6Fpkci1_v_+0x74
V [libjvm.so+0x1102cd8];; __1cETypeEmeet6kMpk0_2_+0x5d0
V [libjvm.so+0x110f0b4];; __1cKTypeOopPtrGfilter6kMpknEType__3_+0x2c
V [libjvm.so+0x527874];; __1cSConstraintCastNodeFValue6kMpnOPhaseTransform__pknEType__+0x1a4
V [libjvm.so+0xef8f98];; __1cMPhaseIterGVNNtransform_old6MpnENode__2_+0x7c8
V [libjvm.so+0xef7b80];; __1cMPhaseIterGVNIoptimize6M_v_+0x2b0
V [libjvm.so+0x4a9714];; __1cHCompileIOptimize6M_v_+0x1cc
V [libjvm.so+0x4a37ac];; __1cHCompile2t6MpnFciEnv_pnKC2Compiler_pnIciMethod_ibb_v_+0x21e4
V [libjvm.so+0x2f8128];; __1cKC2CompilerOcompile_method6MpnFciEnv_pnIciMethod_i_v_+0x88
V [libjvm.so+0x4bdcec];; __1cNCompileBrokerZinvoke_compiler_on_method6FpnLCompileTask__v_+0x198c
V [libjvm.so+0x4bb548];; __1cNCompileBrokerUcompiler_thread_loop6F_v_+0xd10
V [libjvm.so+0x10dbf44];; __1cKJavaThreadRthread_main_inner6M_v_+0x224
V [libjvm.so+0x10dbcfc];; __1cKJavaThreadDrun6M_v_+0x564
V [libjvm.so+0xe5ab34];; java_start+0x1c4


Current CompileTask:
C2:6435 b sun.security.provider.PolicyFile.getPermissions(Ljava/security/CodeSource;)Ljava/security/PermissionCollection; (13 bytes)