VM crashed in HS19b03 PIT on linux-amd64.

A fragment of hs_err file:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f6674683758, pid=14545, tid=140077895416144
#
# JRE version: 7.0-b97
# Java VM: Java HotSpot(TM) 64-Bit Server VM (19.0-b03-201006180724.et151817.hs19b03-fastdebug mixed mode linux-amd64 compressed oops)
# Problematic frame:
# V [libjvm.so+0x896758]
#

Instructions: (pc=0x00007f6674683758)
0x00007f6674683748: 03 00 00 4c 8b 25 be 0a 6c 00 66 0f 1f 44 00 00
0x00007f6674683758: 41 8b 5d 28 85 db 7e 38 41 8b 04 24 85 c0 0f 8e
;; 00007f6674683748 03 00 add (%rax),%eax
;; 00007f667468374a 00 4c 8b 25 add %cl,0x25(%rbx,%rcx,4)
;; 00007f667468374e be 0a 6c 00 66 mov $0x66006c0a,%esi
;; 00007f6674683753 0f 1f (bad)
;; 00007f6674683755 44 00 00 add %r8b,(%rax)
;; ---------------
;; 00007f6674683758 41 8b 5d 28 mov 0x28(%r13),%ebx
;; 00007f667468375c 85 db test %ebx,%ebx
;; 00007f667468375e 7e 38 jle 0x00007f6674683798
;; 00007f6674683760 41 8b 04 24 mov (%r12,1),%eax
;; 00007f6674683764 85 c0 test %eax,%eax
;; 00007f6674683766 0f 8e ff ff ff ff jle 0x00007f667468376b
;;
Stack: [0x00007f666d227000,0x00007f666d328000], sp=0x00007f666d3269d0, free space=3fe0000000000000018k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x896758];; _ZN2os13PlatformEvent6unparkEv+0x28
V [libjvm.so+0x9daf4a];; _ZN13ObjectMonitor10SimpleExitEP6Thread+0xda
V [libjvm.so+0x9db054];; _ZN13ObjectMonitor8raw_exitEP6Thread+0x44
V [libjvm.so+0x728c71];; _ZN8JvmtiEnv14RawMonitorExitEP15JvmtiRawMonitor+0xa1
...

Please see comments for hs_err and test location.