Issue #19335 has been reported by kyanagi (Kouhei Yanagita). ---------------------------------------- Bug #19335: Integer#remainder and Numeric#remainder should respect #coerce https://bugs.ruby-lang.org/issues/19335 * Author: kyanagi (Kouhei Yanagita) * Status: Open * Priority: Normal * ruby -v: ruby 3.2.0 (2022-12-25 revision a528908271) [arm64-darwin21] * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- Thinking of the result of the following, `Integer#remainder` and `Numeric#remainder` should respect `#coerce`. (`BigDecimal#remainder` seems to respect `#coerce`.) ```Ruby c = Object.new def c.coerce(other) [other, 10] end p 1234 / c # => 123 p 1234.div(c) # => 123 p 1234.quo(c) # => (617/5) p 1234.fdiv(c) # => 123.4 p 1234 % c # => 4 p 1234.modulo(c) # => 4 p 1234.divmod(c) # => [123, 4] p 1234.remainder(c) # => in `remainder': comparison of Object with 0 failed (ArgumentError) p 1234.0 / c # => 123 p 1234.0.div(c) # => 123 p 1234.0.quo(c) # => (617/5) p 1234.0.fdiv(c) # => 123.4 p 1234.0 % c # => 4 p 1234.0.modulo(c) # => 4 p 1234.0.divmod(c) # => [123, 4] p 1234.0.remainder(c) # => in `remainder': comparison of Object with 0 failed (ArgumentError) require 'bigdecimal' p BigDecimal('1234.0').remainder(c) # => 0.4e1 ``` -- https://bugs.ruby-lang.org/