Exception in thread "Thread-12" java.lang.ClassCastException: org.jruby.RubyBasicObject$Finalizer cannot be cast to org.jruby.runtime.builtin.IRubyObject
        at org.jruby.RubyBasicObject$2.visit(RubyBasicObject.java:1034)
        at org.jruby.runtime.builtin.InstanceVariableTable.visit(InstanceVariableTable.java:287)
        at org.jruby.RubyBasicObject.getVariableList(RubyBasicObject.java:1032)
        at org.jruby.RubyClass$3.marshalTo(RubyClass.java:777)
        at org.jruby.RubyClass.marshal(RubyClass.java:752)
        at org.jruby.runtime.marshal.MarshalStream.writeObjectData(MarshalStream.java:265)
        at org.jruby.runtime.marshal.MarshalStream.writeDirectly(MarshalStream.java:179)
        at org.jruby.runtime.marshal.MarshalStream.writeAndRegister(MarshalStream.java:138)
        at org.jruby.runtime.marshal.MarshalStream.dumpObject(MarshalStream.java:100)
        at org.jruby.RubyMarshal.dumpToStream(RubyMarshal.java:183)
        at org.jruby.RubyMarshal.dump(RubyMarshal.java:104)
        at org.jruby.RubyMarshal$s_method_0_2$RUBYFRAMEDINVOKER$dump.call(org/jruby/RubyMarshal$s_method_0_2$RUBYFRAMEDINVOKER$dump.gen)
        at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:243)
        at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:152)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:110)
        at org.jruby.ast.CallOneArgNode.interpret(CallOneArgNode.java:57)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
        at org.jruby.ast.RescueNode.executeBody(RescueNode.java:225)
        at org.jruby.ast.RescueNode.interpretWithJavaExceptions(RescueNode.java:147)
        at org.jruby.ast.RescueNode.interpret(RescueNode.java:110)
        at org.jruby.ast.BeginNode.interpret(BeginNode.java:83)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:163)
        at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:144)
        at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:273)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:112)
        at org.jruby.ast.FCallOneArgNode.interpret(FCallOneArgNode.java:36)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.ast.CallNoArgNode.interpret(CallNoArgNode.java:61)
        at org.jruby.ast.CallOneArgNode.interpret(CallOneArgNode.java:57)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
        at org.jruby.ast.IfNode.interpret(IfNode.java:112)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
        at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:182)
        at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:153)
        at org.jruby.RubyClass.finvoke(RubyClass.java:372)
        at org.jruby.RubyObject.send(RubyObject.java:1403)
        at org.jruby.RubyObject$i_method_multi$RUBYINVOKER$send.call(org/jruby/RubyObject$i_method_multi$RUBYINVOKER$send.gen)
        at org.jruby.runtime.callsite.CachingCallSite.callBlock(CachingCallSite.java:159)
        at org.jruby.runtime.callsite.CachingCallSite.callIter(CachingCallSite.java:176)
        at ruby.jit.ruby.usr.jruby.lib.ruby.gems.$1_dot_8.gems.actionpack_minus_1_dot_13_dot_6.lib.action_view.base.compile_and_render_template26691529_15459640.__file__(base.rb:325)
        at org.jruby.internal.runtime.methods.JittedMethod.call(JittedMethod.java:94)
        at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:120)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:30)
        at ruby.jit.ruby.usr.jruby.lib.ruby.gems.$1_dot_8.gems.actionpack_minus_1_dot_13_dot_6.lib.action_view.base.render_template9501535_15459640.__file__(base.rb:301)
        at org.jruby.internal.runtime.methods.JittedMethod.call(JittedMethod.java:94)
        at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:120)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:30)
        at ruby.jit.ruby.usr.jruby.lib.ruby.gems.$1_dot_8.gems.actionpack_minus_1_dot_13_dot_6.lib.action_view.base.render_file29496629_15459640.rescue_1$RUBY$__rescue___0(base.rb:260)
        at ruby.jit.ruby.usr.jruby.lib.ruby.gems.$1_dot_8.gems.actionpack_minus_1_dot_13_dot_6.lib.action_view.base.render_file29496629_15459640.__file__(base.rb:259)