Sinatra: Installing Gem shows `unable to convert "\x89" from ASCII-8BIT to UTF-8`

[paulmenzel]

Using Debian GNU/Linux 8 (jessie), and RVM doing gem install sinatra shows conversion errors.

$ gem install sinatra
Fetching: rack-1.6.4.gem (100%)
Successfully installed rack-1.6.4
Fetching: rack-protection-1.5.3.gem (100%)
Successfully installed rack-protection-1.5.3
Fetching: sinatra-1.4.7.gem (100%)
Successfully installed sinatra-1.4.7
Parsing documentation for rack-1.6.4
Installing ri documentation for rack-1.6.4
Parsing documentation for rack-protection-1.5.3
Installing ri documentation for rack-protection-1.5.3
Parsing documentation for sinatra-1.4.7
unable to convert "\x89" from ASCII-8BIT to UTF-8 for lib/sinatra/images/404.png, skipping
unable to convert "\x89" from ASCII-8BIT to UTF-8 for lib/sinatra/images/500.png, skipping
Installing ri documentation for sinatra-1.4.7

[kgrz]

Which ruby was installed on the machine?

[paulmenzel]

Ruby 2.0.0p645 is used.

$ ruby --version
ruby 2.0.0p645 (2015-04-13 revision 50299) [i686-linux]

[anbiniyar]

I tried installing Sinatra on a few different versions on Ruby. RVM on Mac OSX El Capitan

Ruby 2.0.0 -> unable to convert "\x89" from ASCII-8BIT to UTF-8 for lib/sinatra/images/404.png, skipping
Ruby 2.1.8 -> Success

Seems like this is an issue with rdoc gem. By default ruby 2.0.0 install rdoc 4.0.0. On ruby 2.1.0, rdoc 4.1.0 is installed.

A simple gem update rdoc makes this issue go away.

Please refer to this StackOverflow

With this, we can conclude that this is not a Sinatra bug.

Hope this helps

[kgrz]

Closing this issue since this is not related to Sinatra per se, as explained above.