Exception in thread "Ruby Thread1541717" java.util.ConcurrentModificationException
	at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
	at java.util.AbstractList$Itr.next(AbstractList.java:343)
	at org.jruby.Ruby.callEventHooks(Ruby.java:1980)
	at org.jruby.internal.runtime.methods.DefaultMethod.traceReturn(DefaultMethod.java:476)
	at org.jruby.internal.runtime.methods.DefaultMethod.interpretedCall(DefaultMethod.java:179)
	at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:148)
	at org.jruby.RubyClass.invoke(RubyClass.java:238)
	at org.jruby.javasupport.util.RuntimeHelpers.invoke(RuntimeHelpers.java:323)
	at org.jruby.RubyObject.callMethod(RubyObject.java:484)
	at org.jruby.javasupport.util.RuntimeHelpers.callMethodMissing(RuntimeHelpers.java:306)
	at org.jruby.runtime.CallSite$InlineCachingCallSite.cacheAndCall(CallSite.java:108)
	at org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:270)
	at ruby.Users.headius.NetBeansProjects.jruby.break_profile.closure_10_2(break_profile.rb:12)
	at ruby.Users.headius.NetBeansProjects.jruby.break_profileBlockCallback$closure_10_2xx1.call(Unknown Source)
	at org.jruby.runtime.CompiledBlockLight.yield(CompiledBlockLight.java:107)
	at org.jruby.runtime.CompiledBlockLight.yield(CompiledBlockLight.java:88)
	at org.jruby.runtime.Block.yield(Block.java:109)
	at org.jruby.RubyInteger.times(RubyInteger.java:162)
	at org.jruby.RubyIntegerInvoker$times_method_0_0.call(Unknown Source)
	at org.jruby.runtime.CallSite$InlineCachingCallSite.call(CallSite.java:280)
	at ruby.Users.headius.NetBeansProjects.jruby.break_profile.closure_9_1(break_profile.rb:11)
	at ruby.Users.headius.NetBeansProjects.jruby.break_profileBlockCallback$closure_9_1xx1.call(Unknown Source)
	at org.jruby.runtime.CompiledBlock.yield(CompiledBlock.java:107)
	at org.jruby.runtime.CompiledBlock.call(CompiledBlock.java:83)
	at org.jruby.runtime.Block.call(Block.java:105)
	at org.jruby.RubyProc.call(RubyProc.java:205)
	at org.jruby.RubyProc.call(RubyProc.java:184)
	at org.jruby.internal.runtime.RubyNativeThread.run(RubyNativeThread.java:73)