Travis build exception

gistfile1.txt

1Using worker: ruby3.worker.travis-ci.org:ruby-3
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6I'm sorry but an error occured within Travis while running your build.
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8We are continuosly working on test run stability, please email support@travis-ci.org if this error persists.
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10Below is the stacktrace of the error:
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12Error: #<NativeException: org.virtualbox_4_1.VBoxException: The function "powerDown" returned an error condition: "The virtual machine is being powered down"  (0x80bb0002)>
13  org/virtualbox_4_1/IConsole.java:185:in `powerDown'
14  /home/travis/travis-worker/lib/travis/worker/virtual_machine/virtual_box.rb:228:in `power_off'
15  /home/travis/travis-worker/lib/travis/worker/virtual_machine/virtual_box.rb:304:in `with_session'
16  /home/travis/travis-worker/lib/travis/worker/virtual_machine/virtual_box.rb:227:in `power_off'
17  /home/travis/travis-worker/lib/travis/worker/virtual_machine/virtual_box.rb:202:in `close_sandbox'
18  /home/travis/travis-worker/lib/travis/worker/virtual_machine/virtual_box.rb:131:in `sandboxed'
19  /home/travis/.rvm/gems/jruby-1.6.7.2@global/bundler/gems/travis-build-44e0f59068a3/lib/travis/build/remote.rb:25:in `perform'
20  /home/travis/.rvm/gems/jruby-1.6.7.2@global/bundler/gems/travis-build-44e0f59068a3/lib/travis/build.rb:53:in `run'
21  org/jruby/RubyKernel.java:2076:in `send'
22  /home/travis/.rvm/gems/jruby-1.6.7.2@global/bundler/gems/travis-support-27857bb4f542/lib/travis/support/logging.rb:26:in `run_with_log'
23  org/jruby/RubyProc.java:270:in `call'
24  /home/travis/travis-worker/lib/travis/worker.rb:250:in `hard_timeout'
25  /home/travis/travis-worker/lib/hard_timeout.rb:12:in `timeout'
26  org/jruby/RubyProc.java:270:in `call'
27  org/jruby/RubyProc.java:224:in `call'