Reproducible: always
Is a regression: no
Is a platform-specific: yes
Steps to reproduce (a bit long):
1. Clone test workspace from http://shaman.ru.oracle.com/hg/index.cgi/appBundlerTests-8u40/
2. Open project in IDE
3. Run test file com.oracle.appbundlers.tests.functionality.UserFriendlyJvmOptionsTest
Several tests will run, some of them will fail with exception, and one will fail with crash:
com.oracle.appbundlers.tests.functionality.UserFriendlyJvmOptionsTest::runTest$mac.app-cli
It will fail with following crash like:

[STDOUT]: #
[STDOUT]: # A fatal error has been detected by the Java Runtime Environment:
[STDOUT]: #
[STDOUT]: # SIGSEGV (0xb) at pc=0x00007fff8b655fa4, pid=81960, tid=3335
[STDOUT]: #
[STDOUT]: # JRE version: Java(TM) SE Runtime Environment (8.0_60-b12) (build 1.8.0_60-ea-b12)
[STDOUT]: # Java VM: Java HotSpot(TM) 64-Bit Server VM (25.60-b12 mixed mode bsd-amd64 compressed oops)
[STDOUT]: # Problematic frame:
[STDOUT]: # C [libstdc++.6.dylib+0x2cfa4] _ZNSs4_Rep7_M_grabERKSaIcES2_+0x4
[STDOUT]: #
[STDOUT]: # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
[STDOUT]: #
[STDOUT]: # An error report file with more information is saved as:
[STDOUT]: # /private/var/folders/f4/fj1d4r655nq425zpnqn66pvm0000gn/T/testBundlerWorkDir4185457766076588906/bundles/Diehard.app/Contents/Java/hs_err_pid81960.log
[STDERR]: Phoning home...
[STDERR]: Using server: 10.161.186.18, port 4711
[STDOUT]: #
[STDOUT]: # If you would like to submit a bug report, please visit:
[STDOUT]: # http://bugreport.java.com/bugreport/crash.jsp
[STDOUT]: # The crash happened outside the Java Virtual Machine in native code.
[STDOUT]: # See problematic frame for where to report the bug.
[STDOUT]: #
[end time: 2015-04-29T11:51:47.308]

Other crashes:
[STDOUT]: # C [libglass.dylib+0x24eec] -[GlassWindow(Overrides) windowWillClose:]+0x16c
[STDOUT]: # C [libstdc++.6.dylib+0x2cfa4] _ZNSs4_Rep7_M_grabERKSaIcES2_+0x4
[STDOUT]: # C [libstdc++.6.dylib+0x2cfa4] std::string::_Rep::_M_grab(std::allocator<char> const&, std::allocator<char> const&)+0x4
[STDOUT]: # C [libglass.dylib+0x24eec] -[GlassWindow(Overrides) windowWillClose:]+0x16c

Aurora run log: http://aurora.ru.oracle.com/functional/faces/RunDetails.xhtml?names=799965.ManualSubmit-1