IPAddr.new("0.0.0.0") == nil return true

[taketo1113]

IPAddr.new("0.0.0.0") == nil and nil == IPAddr.new("0.0.0.0") return different result.

Steps to reproduce

# IPv4
IPAddr.new("0.0.0.0") == nil
=> true # expected false

nil == IPAddr.new('0.0.0.0') 
=> false

IPAddr.new("0.0.0.0").nil?
=> false

# IPv6
IPAddr.new("::") == nil
=> true # expected false

nil == IPAddr.new("::")
=> false

IPAddr.new("::").nil?
=> false

Expected behavior

IPAddr.new("0.0.0.0") == nil return false, just like IPAddr.new("0.0.0.0").nil?.

Actual behavior

IPAddr.new("0.0.0.0") == nil return true.

System configuration

• IPAddr version: 1.2.5
• Ruby version: 3.3.4

Related Issue

• Fix PostgreSQL Cidr#change?: NoMethodError: undefined method `prefix' for nil rails/rails#51758 (comment)
• == fails #21