[ruby-trunk - Bug #10393] [Open] String#start_with?の1.9.x非互換バグ

Ruby Development
1

Issue #10393 has been reported by Hideyuki Matsuyama.

Bug #10393: String#start_with?の1.9.x非互換バグ

  • Author: Hideyuki Matsuyama
  • Status: Open
  • Priority: Normal
  • Assignee:
  • Category:
  • Target version:
  • ruby -v: ruby 2.1.3p242 (2014-09-19 revision 47630)
    [x86_64-darwin13.0]
  • Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
$ ruby -v
ruby 1.9.3p547 (2014-05-14 revision 45962) [x86_64-darwin13.4.0]
$ irb
> 'foo'.start_with? nil
 => false

$ ruby -v
ruby 2.1.3p242 (2014-09-19 revision 47630) [x86_64-darwin13.0]
$ irb
> 'foo'.start_with? nil
TypeError: no implicit conversion of nil into String

バージョン1.9系との互換性を保つため、結果がfalseになることを期待します。