Bug #18748: Range#cover? returns true for beginless range of different type

• Status: Open
• Priority: Normal
• Assignee: -
• Target version: -
• Backport: 2.7: REQUIRED, 3.0: REQUIRED, 3.1: REQUIRED

[jeremyevans0 (Jeremy Evans)]

While adding documentation to address #18155, I found a bug:

(2..).cover?("2"..) # => false
(..2).cover?(.."2") # => true

I've submitted a pull request for fix this: https://github.com/ruby/ruby/pull/5831