Gemset error when updating to Ruby 2.4.2

Question

I'm updating from Ruby 2.0 to 2.4.2 using RVM, and receive the following error messages during an install using $ rvm install ruby-2.4.2:

Making gemset ruby-2.4.2 pristine - please wait

'command gem pristine --extensions bigdecimal --version 1.3.0 gem-wrappers --version 1.3.2 io-console --version 0.4.6 json --version 2.0.4 openssl --version 2.0.5 psych --version 2.2.2' failed, you need to fix this gems manually.
Error running '__rvm_with ruby-2.4.2 gemset_pristine',
please read /Users/myname/.rvm/log/1507820191_ruby-2.4.2/gemset.pristine-ruby-2.4.2.log

Making gemset ruby-2.4.2@global pristine - please wait

'command gem pristine --extensions bigdecimal --version 1.3.0 io-console --version 0.4.6 json --version 2.0.4 openssl --version 2.0.5 psych --version 2.2.2' failed, you need to fix this gems manually.
Error running '__rvm_with ruby-2.4.2@global gemset_pristine',
please read /Users/myname/.rvm/log/1507820191_ruby-2.4.2/[email protected]

I'm… not quite sure what this means, or what I should do next. Any thoughts? I'm running macOS 10.12.6.

[Edit]: Here's a copy of the error log.

Answer 1

Found a fix as referenced in this RVM GitHub issue that involves installing zlib using brew and then re-installing ruby while pointing to that zlib directory. As someone in that thread pointed out, this shouldn't be necessary. Still not sure why the problem arose.

Steps

$ brew install zlib
$ rvm remove 2.4.2
$ rvm install 2.4.2 —-with-zlib-dir=/usr/local/Cellar/zlib/1.2.11       

Answer 2

According to the RVM docs, you don't use ruby- in the command.
It should be: $ rvm install 2.4.2
I'm not sure if that matters or not though. Have you tried upgrading RVM and Homebrew?

[Edit] Based on this info from the log file:

bigdecimal-1.3.0 +gemset_pristine:20> gem pristine --extensions bigdecimal --version 1.3.0
ERROR:  Loading command: pristine (LoadError)
    cannot load such file -- zlib
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass
+gemset_pristine:21> _failed+=( 'bigdecimal --version 1.3.0' )  

Looks like a zlib problem. Try installing (or re-installing) Command Line Tools.
$ xcode-select --install

There is a very similar issue on github https://github.com/rvm/rvm/issues/4090 It was solved by running $ brew doctor

Answer 3

Just came up against this after needing to use SASS after a while. During which time I had upgraded to El Capitan. So Ruby was 'Old'.

You could probably cut a lot of my steps out by running the following (with a little prior knowledge of the latest Ruby Version).

xcode-select --install brew install zlib rvm reinstall ruby-<latest_version> --with-zlib-dir=/usr/local/Cellar/zlib/<latest_version>

---

This was how I had to go about it. I didn't need to uninstall in the end but I took a lot of wrong turns.

Initially I had to run this line to get xcode up to date:

xcode-select --install

Then install zlib

brew install zlib

Take a note of the directory zlib is installed in

/usr/local/Cellar/zlib/1.2.11

Next update rvm

\curl -sSL https://get.rvm.io | bash -s stable --ruby

Following these steps got me to the point where I was running the latest version of ruby 2.4.1. But zlib wasn't linked to ruby.

So the final step was to run a reinstall

rvm reinstall ruby-2.4.1 --with-zlib-dir=/usr/local/Cellar/zlib/1.2.11