JavaFx crashes when calling javafx.scene.web.WebEngine#executeScript few times.

Running provided SSCCE in the comment section should crash the JVM (using Java 8) - I wasn't able to reproduce it using Java 7.

Maybe it's also worth to mention that using 32bit Java 8 an hs_err_...log file is created - in the case of 64bit Java 8 only Windows minidump file is created.

I've examined the mini dump file (.mdmp) created by Windows - this part might be interesting:
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
STACK_TEXT:
00000000`bf84cb48 00000001`3b283391 : 00000000`5c8f3990 00000000`bfeaedb0 00000001`3d25c6a0 00000000`bfff0b2e : 0x00000001`572d0300
00000000`bf84cb50 00000000`5c8f3990 : 00000000`bfeaedb0 00000001`3d25c6a0 00000000`bfff0b2e 00000000`57a1a9f8 : 0x00000001`3b283391
00000000`bf84cb58 00000000`bfeaedb0 : 00000001`3d25c6a0 00000000`bfff0b2e 00000000`57a1a9f8 00000000`5c8f3990 : 0x5c8f3990
00000000`bf84cb60 00000001`3d25c6a0 : 00000000`bfff0b2e 00000000`57a1a9f8 00000000`5c8f3990 00000000`63c87560 : 0xbfeaedb0
00000000`bf84cb68 00000000`bfff0b2e : 00000000`57a1a9f8 00000000`5c8f3990 00000000`63c87560 00000000`00000000 : jfxwebkit!Java_com_sun_webkit_dom_HTMLObjectElementImpl_checkValidityImpl+0x247f0
00000000`bf84cb70 00000000`57a1a9f8 : 00000000`5c8f3990 00000000`63c87560 00000000`00000000 00000000`7c995250 : 0xbfff0b2e
00000000`bf84cb78 00000000`5c8f3990 : 00000000`63c87560 00000000`00000000 00000000`7c995250 00000001`3d93aa99 : 0x57a1a9f8
00000000`bf84cb80 00000000`63c87560 : 00000000`00000000 00000000`7c995250 00000001`3d93aa99 00000000`bf84cd20 : 0x5c8f3990
00000000`bf84cb88 00000000`00000000 : 00000000`7c995250 00000001`3d93aa99 00000000`bf84cd20 00000000`5970e890 : 0x63c87560
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Please let me know if any additional information is needed.

P.S.: How can I add attachments (would like to attach hs_err_...log file)?