Bug #21147: [Breaking changes or Bug] DateTime Range#to_a behaves different between 3.3.7 and 3.4.1

• Status: Open
• Assignee: -
• Target version: -
• ruby -v: ruby 3.3.7 (2025-01-15 revision be31f993d7) [arm64-darwin24], ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [arm64-darwin24]
• Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[jamesst20 (James St-Pierre)]

a = Time.zone.now.to_date
b = Time.zone.now.to_date

# Ruby 3.3.7
(a..b).to_a
=> [Tue, 18 Feb 2025] 

# Ruby 3.4.1
(a..b).to_a
=> [] 

[jamesst20 (James St-Pierre)]

Sorry, the exemple above is incorrect.

Pure Ruby reproductible

require 'date'
require 'json'

a = Time.now.to_date

# Ruby 3.3.7
(a..a).step(7).to_a
# => [Tue, 18 Feb 2025]

# Ruby 3.4.1
(a..a).step(7).to_a
# => []

[mame (Yusuke Endoh)]

• Related to Bug #21030: Bug: #step with Range<ActiveSupport::Duration> behavior broken on Ruby 3.4.1 added