rbenv wrong gem version in installation directory [duplicate] - ruby-on-rails

Question

This question already has an answer here:
Why is Ruby 1.9.2 on Windows 7 using a 1.9.1 path for gems? it is using c:/ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.0/lib/rails/commands.rb
(1 answer)
Closed 4 years ago.
I've been struggling with this for a while now. I want to use ruby-2.4.1 in my application and installed rbenv and also installed 2.4.1 with it.
I can confirm that ruby -v prints out 2.4.1 is being used.
gem env leads to the following:
RubyGems Environment:
- RUBYGEMS VERSION: 2.6.11
- RUBY VERSION: 2.4.1 (2017-03-22 patchlevel 111) [x86_64-darwin18]
- INSTALLATION DIRECTORY: /Users/thementoria/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0
- USER INSTALLATION DIRECTORY: /Users/thementoria/.gem/ruby/2.4.0
- RUBY EXECUTABLE: /Users/thementoria/.rbenv/versions/2.4.1/bin/ruby
- EXECUTABLE DIRECTORY: /Users/thementoria/.rbenv/versions/2.4.1/bin
- SPEC CACHE DIRECTORY: /Users/thementoria/.gem/specs
- SYSTEM CONFIGURATION DIRECTORY: /Users/thementoria/.rbenv/versions/2.4.1/etc
- RUBYGEMS PLATFORMS:
- ruby
- x86_64-darwin-18
- GEM PATHS:
- /Users/thementoria/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0
- /Users/thementoria/.gem/ruby/2.4.0
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- https://rubygems.org/
- SHELL PATH:
- /Users/thementoria/.rbenv/versions/2.4.1/bin
- /usr/local/Cellar/rbenv/1.1.1/libexec
- /Users/thementoria/.rbenv/bin
- /Users/thementoria/.rbenv/shims
- /usr/local/bin
- /usr/bin
- /bin
- /usr/sbin
- /sbin
- /usr/local/MacGPG2/bin
Note that my USER INSTALLATION DIRECTORY, INSTALLATION DIRECTORY and GEM PATHS have 2.4.0 in it.
What causes this to happen?
In my .bashrc I have:
eval "$(rbenv init -)"
export PATH="$HOME/.rbenv/bin:$PATH"
Any help would be appreciated.

Answer 1

All is fine. Ruby assumes that all gems within a minor version are fully compatible.
This is probably based on a 20 year old decision which would allow you to transfer installed gems within patch versions of Rubies, by simply copying or symlinking them, without downloading them again. I doubt that the same decision would be made today.