Launching and piping command to the app's prompt crashes it

[eyedol]

When I launch haxor-news like so haxor-news | hn top. App crashes with the stack trace below

Traceback (most recent call last):
  File "/usr/local/bin/haxor-news", line 11, in <module>
    load_entry_point('haxor-news==0.4.1', 'console_scripts', 'haxor-news')()
  File "/usr/local/lib/python2.7/site-packages/haxor_news/main.py", line 26, in cli
    haxor.run_cli()
  File "/usr/local/lib/python2.7/site-packages/haxor_news/haxor.py", line 215, in run_cli
    document = self.cli.run()
  File "/usr/local/lib/python2.7/site-packages/prompt_toolkit/interface.py", line 329, in run
    self.renderer.reset()
  File "/usr/local/lib/python2.7/site-packages/prompt_toolkit/renderer.py", line 273, in reset
    self.output.flush()
  File "/usr/local/lib/python2.7/site-packages/prompt_toolkit/terminal/vt100_output.py", line 229, in flush
    out.write(data.encode(self.stdout.encoding, 'replace'))
TypeError: encode() argument 1 must be string, not None
  1.   Lyft Is Said to Seek New Funding as Its Rival Uber Stumbles (nytimes.com)
         173 points by uladzislau 4 hours ago | 185 comments
  2.   Operation Rosehub – patching thousands of open-source projects (opensource.googleblog.com)
         464 points by fhoffa 8 hours ago | 66 comments
  3.   The myth of using Scala as a better Java (appliedscala.com)
         118 points by bontoJR Yesterday | 72 comments
  4.   V8: A Tale of TurboFan (benediktmeurer.de)
         60 points by JoshTriplett 21 hours ago | 2 comments
  5.   Dilution (blog.ycombinator.com)
         391 points by firloop 11 hours ago | 112 comments
  6.   What fossil fuels are doing to our oceans (newhumanist.org.uk)
         122 points by kawera 19 hours ago | 61 comments
  7.   AWS Lambda – Best practices (cloudncode.blog)
         41 points by maingi4 4 hours ago | 7 comments
  8.   Leaked Snapchat emails: Anti-gun group told to pay or NRA ads may appear (mic.com)
         324 points by davidbarker 13 hours ago | 197 comments
  9.   The Clojure Error Message Catalog: common error messages and their meanings (github.com)
         61 points by kimi Yesterday | 1 comments
  10.  Facebook brings suicide prevention tools to Live and Messenger (techcrunch.com)
         16 points by tooba 19 hours ago | 3 comments
  Tip: View the page or comments for 1 through 10 with the following command:
    hn view [#] optional: [-c] [-cr] [-cu] [-cq "regex"] [-ch] [-b] [--help]

[donnemartin]

Hi @eyedol, I can reproduce this issue, thanks for the report!