`load_from_yaml': undefined method `safe_load' for Psych:Module

[liavkoren]

Hi. I'm not really a rubist, so am not sure about the best way to investigate this. On starting a new bash session, I get:

/Library/Ruby/Gems/2.0.0/gems/colorls-0.1.7/lib/colorls/load_from_yaml.rb:4:in `load_from_yaml': undefined method `safe_load' for Psych:Module (NoMethodError)
	from /Library/Ruby/Gems/2.0.0/gems/colorls-0.1.7/lib/colorls/flags.rb:52:in `set_color_opts'
	from /Library/Ruby/Gems/2.0.0/gems/colorls-0.1.7/lib/colorls/flags.rb:5:in `initialize'
	from /Library/Ruby/Gems/2.0.0/gems/colorls-0.1.7/exe/colorls:4:in `new'
	from /Library/Ruby/Gems/2.0.0/gems/colorls-0.1.7/exe/colorls:4:in `<top (required)>'
	from /usr/local/bin/colorls:23:in `load'
	from /usr/local/bin/colorls:23:in `<main>'

As I said, I don't write ruby regularly, so I'm sure aspects of my ruby setup are out of date -- I had to upgrade rvm, and it took a few tries with brew before I managed to get ruby 2.4.1 installed.

This only happens on init, and colorls works fine other than that. It's a nice project, BTW. : )

[athityakumar]

Hey @liavkoren, thanks for filing this issue. Check if gem update psych fixes the issue. 😄

[liavkoren]

Still happens. Output from update and gem list:

$ gem update psych
Updating installed gems
Updating psych
Fetching: psych-2.2.4.gem (100%)
Building native extensions.  This could take a while...
Successfully installed psych-2.2.4
Parsing documentation for psych-2.2.4
Installing ri documentation for psych-2.2.4
Installing darkfish documentation for psych-2.2.4
Done installing documentation for psych after 2 seconds
Parsing documentation for psych-2.2.4
Done installing documentation for psych after 0 seconds
Gems updated: psych
$ gem list psych

*** LOCAL GEMS ***

psych (2.2.4, default: 2.2.2)

[athityakumar]

gem update psych
gem update colorls

[liavkoren]

gem update colorls It's a no-op.

[maxgrenderjones]

Same issue (never used ruby, so don't really know where to start):

> gem list

*** LOCAL GEMS ***

bigdecimal (1.2.0)
colorize (0.8.1)
colorls (0.1.7)
facets (3.1.0)
filesize (0.1.1)
io-console (0.4.2)
json (1.7.7)
psych (2.2.4, 2.0.0)
rdoc (4.0.0)
ruby-terminfo (0.1.1)

[athityakumar]

Hmm, I see that 2 versions of psych are present and 2.0.0 is the one causing problem. Uninstall all versions of psych and try re-installing colorls?

gem uninstall colorls
gem uninstall psych
gem install colorls

[maxgrenderjones]

Well that turned out to be a bad idea 😄 - turns out rubygems needs psych to work at all, so once you uninstall it you break gem. And I'm on centos 7 where the official psych package is 2.0 (which supports puppet, which I can't uninstall) so I would appear to be stuck...

[athityakumar]

Oops, sorry for that. But I'm pretty sure that it's definitely because of an older version of psych being used. For future purposes, maybe this needs to be specified in the colorls.gemspec file.