"Failed to write Core Dump. Core Dumps have been disabled."

When trying to update my server from 1.6.4 to 1.7, everything goes fine until the very end when this error message is displayed (bottom to top):

31.12 05:47:19 [Server] INFO # http://bugreport.sun.com/bugreport/crash.jsp
31.12 05:47:19 [Server] INFO # If you would like to submit a bug report, please visit:
31.12 05:47:19 [Server] INFO #
31.12 05:47:19 [Server] INFO # /dev/null
31.12 05:47:19 [Server] INFO # An error report file with more information is saved as:
31.12 05:47:19 [Server] INFO #
31.12 05:47:19 [Server] INFO # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
31.12 05:47:19 [Server] INFO #
31.12 05:47:19 [Server] INFO # J com.sk89q.worldguard.protection.databases.YAMLDatabase.setFlags(Lcom/sk89q/worldguard/protection/regions/ProtectedRegion;Lcom/sk89q/util/yaml/YAMLNodeV
31.12 05:47:19 [Server] INFO # Problematic frame:
31.12 05:47:19 [Server] INFO # Java VM: Java HotSpot(TM) 64-Bit Server VM (23.21-b01 mixed mode linux-amd64 compressed oops)
31.12 05:47:19 [Server] INFO # JRE version: 7.0_21-b11
31.12 05:47:19 [Server] INFO #
31.12 05:47:19 [Server] INFO # SIGSEGV (0xb) at pc=0x00002b5c5134b831, pid=10289, tid=47675703527744
31.12 05:47:19 [Server] INFO #
31.12 05:47:19 [Server] INFO # A fatal error has been detected by the Java Runtime Environment:
31.12 05:47:19 [Server] INFO #

I contacted my server host and, as I thought, they said it was a problem with WorldGuard. I'm not sure when WorldGuard for 1.7 will be released and I was wondering if there was anything I could do in the mean time to fix it. Any ideas?

Thanks!

 

Try using these versions of WE and WG:
http://builds.enginehub.org/job/worldedit/last-successful/?branch=master
http://builds.enginehub.org/job/worldguard/last-successful/?branch=master