At /home/kn07/.atom/packages/kernel-docstring/lib/kernel-docstring.coffee:48

TypeError: Cannot read property '0' of null
    at docstring (/packages/kernel-docstring/lib/kernel-docstring.coffee:48:28)
    at Object.convert (/packages/kernel-docstring/lib/kernel-docstring.coffee:70:40)
    at /packages/kernel-docstring/lib/kernel-docstring.coffee:9:45)
    at CommandRegistry.handleCommandEvent (/usr/share/atom/resources/app/static/<embedded>:11:349392)
    at KeymapManager.dispatchCommandEvent (/usr/share/atom/resources/app/static/<embedded>:11:1252536)
    at KeymapManager.handleKeyboardEvent (/usr/share/atom/resources/app/static/<embedded>:11:1248670)
    at WindowEventHandler.handleDocumentKeyEvent (/usr/share/atom/resources/app/static/<embedded>:11:284598)

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  2x -0:26.8.0 core:backspace (input.hidden-input)
  3x -0:26.1.0 core:move-up (input.hidden-input)
     -0:25.5.0 core:move-down (input.hidden-input)
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     -0:22.3.0 core:backspace (input.hidden-input)
     -0:22.1.0 core:save (input.hidden-input)
  2x -0:13.5.0 kernel-docstring:convert (input.hidden-input)

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