What does it mean bundler (default: 1.16.2) when I run "gem list"? What's the (defailt) part?

Question

I got this error message:

.rvm/gems/ruby-2.5.1/bin/ruby_executable_hooks:24:in `<main>'

I reinstalled Ruby

rvm reinstall ruby-2.5.1

it gives an error message:

Error running '__rvm_with ruby-2.5.1 gemset_pristine', please read
/home/zoli/.rvm/log/1533209563_ruby-2.5.1/gemset.pristine-ruby-2.5.1.log

This is how I first run into this error:

$ gem list bun
*** LOCAL GEMS ***
bundler (default: 1.16.2)

Gem list gives a list of gems - some includes (default: ...) part. What does it mean? I ran into this Github thread: bundler https://github.com/bundler/bundler/issues/6290 which has the same issue:

(default: 1.16.1, default: 1.16.0)

It gives an error when I try to run commands with Ruby gems.

How to install Rubies with RVM without using any binary? What does this (default) part mean?

Answer 1

The default part lists the default gem versions, the ones that are part of a specific Ruby.

You can find a list of default gems per Ruby version at https://stdgems.org/. Quote from that same site:

There are two different kinds of standard gems:

• Default gems: These gems are part of Ruby and you can always require them directly. You cannot remove them. They are maintained by Ruby core.

• Bundled gems: The behavior of bundled gems is similar to normal gems, but they get automatically installed when you install Ruby. They can be uninstalled and they are maintained outside of Ruby core.