Getting EOFError with `visit`

[Hainish]

Apologies if this is a duplicate of #777. I'm getting this for capybara-webkit >= 1.3.0, <= 1.5.1, master. Haven't tested earlier versions. I'm running this on a headless server with xvfb

Stack trace with 1.3.0:

2.2.0 :001 > session = Capybara::Session.new :webkit                
 => #<Capybara::Session> 
2.2.0 :002 > session.visit("http://www.mikulski.senate.gov/contact")
EOFError: end of file reached
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-webkit-1.3.0/lib/capybara/webkit/connection.rb:49:in `read_nonblock'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-webkit-1.3.0/lib/capybara/webkit/connection.rb:49:in `read'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-webkit-1.3.0/lib/capybara/webkit/connection.rb:40:in `gets'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-webkit-1.3.0/lib/capybara/webkit/browser.rb:269:in `check'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-webkit-1.3.0/lib/capybara/webkit/browser.rb:208:in `command'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-webkit-1.3.0/lib/capybara/webkit/browser.rb:18:in `visit'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-webkit-1.3.0/lib/capybara/webkit/driver.rb:29:in `visit'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-2.4.4/lib/capybara/session.rb:227:in `visit'
        from (irb):2
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/padrino-core-0.12.5/lib/padrino-core/cli/base.rb:40:in `console'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/padrino-core-0.12.5/bin/padrino:9:in `<top (required)>'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/padrino:23:in `load'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/padrino:23:in `<main>'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/ruby_executable_hooks:15:in `eval'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/ruby_executable_hooks:15:in `<main>'2.2.0 :003 > 

Stack trace with master:

2.2.0 :060 >   session = Capybara::Session.new :webkit
 => #<Capybara::Session>
2.2.0 :061 > session.visit("http://www.mikulski.senate.gov/contact")
WARNING: The next major version of capybara-webkit will require at least version 5.0 of Qt. You're using version 4.8.6.
Request to unknown URL: http://www.mikulski.senate.gov/contact
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/contact")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://fast.fonts.net/jsapi/c01896be-b088-431c-b6bc-6b74b02febda.js
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://fast.fonts.net/jsapi/c01896be-b088-431c-b6bc-6b74b02febda.js")
To allow requests to URLs from this host:
  page.driver.allow_url("fast.fonts.net")
Request to unknown URL: http://www.mikulski.senate.gov/themes/default_v2/styles/bootstrap.css?cachebuster=1412247007
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/default_v2/styles/bootstrap.css?cachebuster=1412247007")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/styles/common.css?cachebuster=1422373725
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/styles/common.css?cachebuster=1422373725")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://platform.twitter.com/widgets.js
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://platform.twitter.com/widgets.js")
To allow requests to URLs from this host:
  page.driver.allow_url("platform.twitter.com")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/jquery/jquery.js?cachebuster=1412247434
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/jquery/jquery.js?cachebuster=1412247434")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/default_v2/scripts/bootstrap.min.js
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/default_v2/scripts/bootstrap.min.js")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/orientation.js?cachebuster=1412247527
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/orientation.js?cachebuster=1412247527")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/mootools/mootools.js?cachebuster=1412247526
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/mootools/mootools.js?cachebuster=1412247526")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/mootools/mootools-more.js?cachebuster=1412247525
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/mootools/mootools-more.js?cachebuster=1412247525")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/bookmark_bubble/bookmark_bubble.js?cachebuster=1412247351
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/bookmark_bubble/bookmark_bubble.js?cachebuster=1412247351")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/bookmark_bubble/senate_bubble.js?cachebuster=1412247352
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/bookmark_bubble/senate_bubble.js?cachebuster=1412247352")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/modernizr/modernizr.js?cachebuster=1412247524
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/modernizr/modernizr.js?cachebuster=1412247524")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/selectivizr/selectivizr.js?cachebuster=1412247533
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/selectivizr/selectivizr.js?cachebuster=1412247533")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/scripts/vendor/bootstrap/bootstrap-select.js?cachebuster=1412249586
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/scripts/vendor/bootstrap/bootstrap-select.js?cachebuster=1412249586")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/twitterfeed/twitter-post-fetcher.js?cachebuster=1412247767
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/twitterfeed/twitter-post-fetcher.js?cachebuster=1412247767")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/scripts/jquery.backgroundSize.js
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/scripts/jquery.backgroundSize.js")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/scripts/global.js
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/scripts/global.js")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/wt_sdc/mikulski_webtrends.js
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/wt_sdc/mikulski_webtrends.js")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/popover-extended.js?cachebuster=1412247025
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/popover-extended.js?cachebuster=1412247025")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/scripts/vendor/jquery/jquery.validate.js?cachebuster=1412247435
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/scripts/vendor/jquery/jquery.validate.js?cachebuster=1412247435")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/images/logo.png
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/images/logo.png")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/images/ajax-loader.gif
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/images/ajax-loader.gif")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/images/footer/map-transparent.png
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/images/footer/map-transparent.png")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://fast.fonts.net/t/1.css?apiType=js&projectid=c01896be-b088-431c-b6bc-6b74b02febda
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://fast.fonts.net/t/1.css?apiType=js&projectid=c01896be-b088-431c-b6bc-6b74b02febda")
To allow requests to URLs from this host:
  page.driver.allow_url("fast.fonts.net")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/images/footer/icon-minus.png
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/images/footer/icon-minus.png")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://www.mikulski.senate.gov/themes/mikulski/images/footer/googleTrans.png
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://www.mikulski.senate.gov/themes/mikulski/images/footer/googleTrans.png")
To allow requests to URLs from this host:
  page.driver.allow_url("www.mikulski.senate.gov")
Request to unknown URL: http://sdc1.senate.gov/dcsh3dc9j7iyw688hmwfk3x9c_8k3k/wtid.js
To block requests to unknown URLs:
  page.driver.block_unknown_urls
To allow just this URL:
  page.driver.allow_url("http://sdc1.senate.gov/dcsh3dc9j7iyw688hmwfk3x9c_8k3k/wtid.js")
To allow requests to URLs from this host:
  page.driver.allow_url("sdc1.senate.gov")
EOFError: end of file reached
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bundler/gems/capybara-webkit-179ca5b6daa2/lib/capybara/webkit/connection.rb:55:in `read_nonblock'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bundler/gems/capybara-webkit-179ca5b6daa2/lib/capybara/webkit/connection.rb:55:in `read'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bundler/gems/capybara-webkit-179ca5b6daa2/lib/capybara/webkit/connection.rb:46:in `gets'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bundler/gems/capybara-webkit-179ca5b6daa2/lib/capybara/webkit/browser.rb:287:in `check'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bundler/gems/capybara-webkit-179ca5b6daa2/lib/capybara/webkit/browser.rb:210:in `command'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bundler/gems/capybara-webkit-179ca5b6daa2/lib/capybara/webkit/browser.rb:18:in `visit'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bundler/gems/capybara-webkit-179ca5b6daa2/lib/capybara/webkit/driver.rb:42:in `visit'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/capybara-2.4.4/lib/capybara/session.rb:227:in `visit'
        from (irb):61
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/padrino-core-0.12.5/lib/padrino-core/cli/base.rb:40:in `console'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/gems/padrino-core-0.12.5/bin/padrino:9:in `<top (required)>'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/padrino:23:in `load'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/padrino:23:in `<main>'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/ruby_executable_hooks:15:in `eval'
        from /home/phantomdc/.rvm/gems/ruby-2.2.0@phantom-dc/bin/ruby_executable_hooks:15:in `<main>'2.2.0 :062 >

[aramprice]

Could this be similar to the issue[1] we are seeing with v1.5.1 (but not v1.5.0)?

[1] #535 (comment)

[Hainish]

@aramprice I do encounter this with v1.5.0. Are you able to reproduce the error?

[aramprice]

@Hainish - we have only seen this with v1.5.0. We are on OS X 10.10.4 using brew installed qt v4.8.6

There are more details in #535.

aram

[jferris]

I just released 1.5.2 with some crash fixes. Can you give that a try?

[aramprice]

That seems to have resolved it, see #535 (comment)

[calleluks]

@Hainish Can you confirm whether version 1.5.2 resolves this issue or not?

[chamnap]

I faced this problem with qt5 and capybara-webkit 1.6.0. It runs on a headless Ubuntu 14.04 instance. Totally okay on my mac os 10.10.

EOFError: end of file reached
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-webkit-1.6.0/lib/capybara/webkit/connection.rb:55:in `read_nonblock'
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-webkit-1.6.0/lib/capybara/webkit/connection.rb:55:in `read'
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-webkit-1.6.0/lib/capybara/webkit/connection.rb:46:in `gets'
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-webkit-1.6.0/lib/capybara/webkit/browser.rb:299:in `check'
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-webkit-1.6.0/lib/capybara/webkit/browser.rb:211:in `command'
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-webkit-1.6.0/lib/capybara/webkit/browser.rb:19:in `visit'
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-webkit-1.6.0/lib/capybara/webkit/driver.rb:48:in `visit'
    from /home/ubuntu/.rvm/gems/ruby-2.1.5/gems/capybara-2.4.4/lib/capybara/session.rb:227:in `visit'

Any ideas? It's a random failure.

[Octowl]

I'm currently facing this problem with qt 5.2.1 using capybara-webkit 1.5.2 and running it on a headless Ubuntu 14.04.2 instance

EOFError: end of file reached
/var/lib/gems/1.9.1/gems/capybara-webkit-1.5.2/lib/capybara/webkit/connection.rb:49:in `read_nonblock'
/var/lib/gems/1.9.1/gems/capybara-webkit-1.5.2/lib/capybara/webkit/connection.rb:49:in `read'
/var/lib/gems/1.9.1/gems/capybara-webkit-1.5.2/lib/capybara/webkit/connection.rb:40:in `gets'
/var/lib/gems/1.9.1/gems/capybara-webkit-1.5.2/lib/capybara/webkit/browser.rb:283:in `check'
/var/lib/gems/1.9.1/gems/capybara-webkit-1.5.2/lib/capybara/webkit/browser.rb:210:in `command'
/var/lib/gems/1.9.1/gems/capybara-webkit-1.5.2/lib/capybara/webkit/browser.rb:18:in `visit'
/var/lib/gems/1.9.1/gems/capybara-webkit-1.5.2/lib/capybara/webkit/driver.rb:41:in `visit'
/var/lib/gems/1.9.1/gems/capybara-2.4.0/lib/capybara/session.rb:226:in `visit'
/var/lib/gems/1.9.1/gems/capybara-2.4.0/lib/capybara/dsl.rb:51:in `block (2 levels) in <module:DSL>'
/root/Content/lib/tasks/instagram.rake:35:in `block (3 levels) in <top (required)>'
/var/lib/gems/1.9.1/gems/activerecord-4.0.0/lib/active_record/relation/delegation.rb:13:in `each'
/var/lib/gems/1.9.1/gems/activerecord-4.0.0/lib/active_record/relation/delegation.rb:13:in `each'
/root/Content/lib/tasks/instagram.rake:32:in `block (2 levels) in <top (required)>'

Same code runs fine locally on my Mac OSX 10.10.4
Could this be a regression?

[Hainish]

I've created a docker image for this issue. See https://github.com/Hainish/capybara-webkit-782

Interestingly, if I change the FROM image from ubuntu to debian, I no longer encounter this error. So this looks to be ubuntu-specific, at least in this instance.

[chamnap]

Any updates on this?

[klausmeyer]

👍 We're also having this issue in our travis-ci setup:

root@90e4d336f4e3:/# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.5 LTS
Release:    12.04
Codename:   precise
root@90e4d336f4e3:/# qmake -v
QMake version 3.0
Using Qt version 5.2.1 in /usr/lib/x86_64-linux-gnu
root@90e4d336f4e3:/# 

capybara-webkit version 1.6.0

[galaydaroman]

I had the same issue with capybara-webkit . My environment is:

• ubuntu 14.04 LTS
• qt 5.2.1
• xvfb

And I have tried with capybara-webkit versions 1.4.1, 1.5.0, 1.6.0.
After deep investigations I have found that capybara-webkit in debug mode shows me a lot of error related to lib gstreamer. Sorry, but I could not provide this debug for now.

Anyway I have resolve this issue with installing additional packeges:

apt-get install gstreamer1.0-plugins-base gstreamer1.0-tools gstreamer1.0-x

Please, let me know if it helps. Thanks

[aguynamedben]

I got the same error using capybara-webkit 1.7.0 and qt 5.5.0 (from homebrew).

I rebuilt capybara-webkit with qt4, which seemed to resolve it on my local OS X...

    gem uninstall capybara-webkit (selected "Remove all versions")
    brew uninstall qt5
    brew install qt4 (qt 4.8.7 was installed)
    bundle