Hello,
We develop a big commercial app and we encounter a jvm crash when used with the following conditions match:
* under linux (uname -a : Linux plx01076 3.1.0-7.fc16.i686 #1 SMP Tue Nov 1 21:00:16 UTC 2011 i686 i686 i386 GNU/Linux )
* using java 8.0.20-ea b20&b21 (works well in 8.0.5) (using the jre of the jdk for instrumentation agent libs)
* using instrumentation agent
* using JIT



* Disabling JIT with -Xint works well
* Using instrumentation agent on classes that do not refer to javafx package works well
* Using java 8u5 works well

I'll attach the errors hs files
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xa8713ac7, pid=21486, tid=2130029376
#
# JRE version: Java(TM) SE Runtime Environment (8.0_20-b20) (build 1.8.0_20-ea-b20)
# Java VM: Java HotSpot(TM) Server VM (25.20-b20 mixed mode linux-x86 )
# Problematic frame:
#
[error occurred during error reporting (printing problematic frame), id 0xb]

# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /home/exped/orga-dev/install/hs_err_pid21486.log
Compiled method (c1) 22926 6487 2 sun.invoke.util.ValueConversions::identity (2 bytes)
 total in heap [0xa90a6688,0xa90a6864] = 476
 relocation [0xa90a6758,0xa90a6780] = 40
 main code [0xa90a6780,0xa90a6800] = 128
 stub code [0xa90a6800,0xa90a6820] = 32
 metadata [0xa90a6820,0xa90a6824] = 4
 scopes data [0xa90a6824,0xa90a6830] = 12
 scopes pcs [0xa90a6830,0xa90a6860] = 48
 dependencies [0xa90a6860,0xa90a6864] = 4
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#


----------------------------------------------------------------------------------------------------------------------------------
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xa8713ac7, pid=21486, tid=2130029376
#
# JRE version: Java(TM) SE Runtime Environment (8.0_20-b20) (build 1.8.0_20-ea-b20)
# Java VM: Java HotSpot(TM) Server VM (25.20-b20 mixed mode linux-x86 )
# Problematic frame:
#
[error occurred during error reporting (printing problematic frame), id 0xb]

# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#

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

Current thread (0x7ee0fc00): JavaThread "QuantumRenderer-0" daemon [_thread_in_Java, id=21502, stack(0x7ef0a000,0x7ef5b000)]

siginfo: si_signo: 11 (SIGSEGV), si_code: 1 (SEGV_MAPERR), si_addr: 0x00001461

Registers:
EAX=0x9ecac290, EBX=0x83eb65e8, ECX=0x9ecac290, EDX=0x88573690
ESP=0x7ef587c0, EBP=0x7ef587e0, ESI=0x00001460, EDI=0xa90a6780
EIP=0xa8713ac7, EFLAGS=0x00210246, CR2=0x00001461

Top of Stack: (sp=0x7ef587c0)
0x7ef587c0: a899ef60 7ee11240 7ef587e0 a8c14128
0x7ef587d0: 7ee11240 a8c14128 9ecac290 885736b8
0x7ef587e0: 866fc268 7ee0fc00 011894ce 7ee0fc00
0x7ef587f0: 866fc268 7ee0fc00 7ef58810 a8c0a5c0
0x7ef58800: a8c0a5c0 a8c0a5c0 9ecac6f0 885736b8
0x7ef58810: 884ddc00 ffff0167 ffffffff 01003723
0x7ef58820: 00000073 884ca8c0 7ef58828 868031ec
0x7ef58830: 7ef5885c 86803b18 7ef58860 a8e1d2a0

Instructions: (pc=0xa8713ac7)
0xa8713aa7: 00 00 c7 87 28 01 00 00 00 00 00 00 81 7f 04 00
0xa8713ab7: 00 00 00 0f 85 40 c9 fe ff 8b 75 e4 8b 7d e8 c3
0xa8713ac7: 0f b7 56 01 8b 4d ec c1 e2 02 8b 5c 91 10 8b 44
0xa8713ad7: 91 14 8b 4c 91 0c 8b 49 38 8b d0 c1 ea 15 83 e2

Register to memory mapping:

EAX=0x9ecac290 is an oop
com.sun.scenario.effect.impl.Renderer$$Lambda$336/7637527
 - klass: 'com/sun/scenario/effect/impl/Renderer$$Lambda$336'
EBX={method} {0x83eb65e8} 'identity' '(Ljava/lang/Object;)Ljava/lang/Object;' in 'sun/invoke/util/ValueConversions'
ECX=0x9ecac290 is an oop
com.sun.scenario.effect.impl.Renderer$$Lambda$336/7637527
 - klass: 'com/sun/scenario/effect/impl/Renderer$$Lambda$336'
EDX=0x88573690 is an oop
java.lang.invoke.MemberName
ESP=0x7ef587c0 is pointing into the stack for thread: 0x7ee0fc00
EBP=0x7ef587e0 is pointing into the stack for thread: 0x7ee0fc00
ESI=0x00001460 is an unknown value
EDI=0xa90a6780 is at entry_point+0 in (nmethod*)0xa90a6688


Stack: [0x7ef0a000,0x7ef5b000], sp=0x7ef587c0, free space=313k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)

[error occurred during error reporting (printing native stack), id 0xb]


--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
  0x7c07b000 JavaThread "Timer-3" daemon [_thread_blocked, id=21517, stack(0x7c418000,0x7c469000)]
  0x7c0a1000 JavaThread "Timer-2" daemon [_thread_blocked, id=21515, stack(0x7be5e000,0x7beaf000)]
  0x7c096000 JavaThread "Timer-1" daemon [_thread_blocked, id=21514, stack(0x7beaf000,0x7bf00000)]
  0x84393000 JavaThread "Thread-5" [_thread_blocked, id=21512, stack(0x7c85e000,0x7c8af000)]
  0x7ca08400 JavaThread "Thread-4" [_thread_blocked, id=21511, stack(0x7c8af000,0x7c900000)]
  0x7cb4dc00 JavaThread "Keep-Alive-Timer" daemon [_thread_blocked, id=21510, stack(0x8444f000,0x844a0000)]
  0x7d02b000 JavaThread "Thread-3" [_thread_blocked, id=21509, stack(0x7d142000,0x7d193000)]
  0x7d6e0c00 JavaThread "Thread-2" [_thread_in_native, id=21507, stack(0x7d193000,0x7d1e4000)]
  0x7d6af400 JavaThread "Prism Font Disposer" daemon [_thread_blocked, id=21506, stack(0x7d350000,0x7d3a1000)]
  0x7ee27800 JavaThread "Attach Listener" daemon [_thread_blocked, id=21505, stack(0x7da17000,0x7da68000)]
=>0x7ee0fc00 JavaThread "QuantumRenderer-0" daemon [_thread_in_Java, id=21502, stack(0x7ef0a000,0x7ef5b000)]
  0x845a8400 JavaThread "AWT-XAWT" daemon [_thread_in_native, id=21501, stack(0x83e0d000,0x83e5e000)]
  0x8459f000 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=21500, stack(0x83e5e000,0x83eaf000)]
  0x84124800 JavaThread "HttpClient-Pinger" daemon [_thread_blocked, id=21499, stack(0x840af000,0x84100000)]
  0x8633a000 JavaThread "Service Thread" daemon [_thread_blocked, id=21496, stack(0x87e03000,0x87e54000)]
  0x86337000 JavaThread "C1 CompilerThread1" daemon [_thread_blocked, id=21495, stack(0x85ffe000,0x8607f000)]
  0x86335000 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id=21494, stack(0x8607f000,0x86100000)]
  0x86333800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=21493, stack(0x87e54000,0x87ea5000)]
  0x86316800 JavaThread "Finalizer" daemon [_thread_blocked, id=21492, stack(0x88002000,0x88053000)]
  0x86315000 JavaThread "Reference Handler" daemon [_thread_blocked, id=21491, stack(0xb7802000,0xb7853000)]
  0xb7706800 JavaThread "JavaFX Application Thread" [_thread_blocked, id=21487, stack(0xb785f000,0xb78b0000)]

Other Threads:
  0x86310c00 VMThread [stack: 0x8640f000,0x86490000] [id=21490]
  0x8633bc00 WatcherThread [stack: 0x85f7d000,0x85ffe000] [id=21497]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None