Issue #15791 has been updated by MSP-Greg (Greg L).


I assume it was decided a long time ago.  1.9.3 has a value of 1.9.1.

Maybe a decision was made later that ABI versions would only change on minor releases?

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Bug #15791: Clarify reason for RbConfig's ruby_version not reflecting "teeny" value
https://bugs.ruby-lang.org/issues/15791#change-77881

* Author: headius (Charles Nutter)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: all
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
I did not realize that MRI always reports `RbConfig::CONFIG['ruby_version']` without the "teeny" value. Instead, it makes it always 0:

```
$ rvm ruby-2.6.2 do ruby -v -e 'p RbConfig::CONFIG["ruby_version"]'
ruby 2.6.2p47 (2019-03-13 revision 67232) [x86_64-darwin18]
"2.6.0"
```

This seems like a bug to me. It is a visible behavior because several package-management systems (RubyGems, Bundler, stuff in Ruby switchers like RVM) use this value, rather than RUBY_VERSION, to set up directory paths.

I believe it should reflect the full, accurate version, but I have not been able to find any discussion about why it does not do so.



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