rvm install 2.6 (rvm_ignore_gemsets_flag=1)

gistfile1.txt

ethan@next:~ ⦿ $ rvm install 2.6
Warning, new version of rvm available '1.29.9', you are using older version '1.29.9-next'.
You can disable this warning with:   echo rvm_autoupdate_flag=0 >> ~/.rvmrc
You can enable auto-update with:     echo rvm_autoupdate_flag=2 >> ~/.rvmrc
You can update manually with:        rvm get VERSION                         (e.g. 'rvm get stable')

Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.12/x86_64/ruby-2.6.5.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx.
Certificates bundle '/usr/local/etc/openssl@1.1/cert.pem' is already up to date.
Requirements installation successful.
Installing Ruby from source to: /Users/ethan/.rvm/rubies/ruby-2.6.5, this may take a while depending on your cpu(s)...
ruby-2.6.5 - #downloading ruby-2.6.5, this may take a while depending on your connection...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13.4M  100 13.4M    0     0   985k      0  0:00:14  0:00:14 --:--:-- 1136k
ruby-2.6.5 - #extracting ruby-2.6.5 to /Users/ethan/.rvm/src/ruby-2.6.5.....
ruby-2.6.5 - #configuring.......................................................................
ruby-2.6.5 - #post-configuration.
ruby-2.6.5 - #compiling...........................................................................................................................................................................-
ruby-2.6.5 - #installing.............
ruby-2.6.5 - #making binaries executable..
/Users/ethan/.rvm/gems/ruby-2.6.5/bin
/Users/ethan/.rvm/gems/ruby-2.6.5
ruby-2.6.5 - #downloading rubygems-3.0.6
ruby-2.6.5 - #extracting rubygems-3.0.6......
ruby-2.6.5 - #removing old rubygems........
ruby-2.6.5 - #installing rubygems-3.0.6.
Error running 'env GEM_HOME=/Users/ethan/.rvm/gems/ruby-2.6.5@global GEM_PATH= /Users/ethan/.rvm/rubies/ruby-2.6.5/bin/ruby -d /Users/ethan/.rvm/src/rubygems-3.0.6/setup.rb --no-document',
please read /Users/ethan/.rvm/log/1579350937_ruby-2.6.5/rubygems.install.log