Issue #15479 has been updated by sapry1586@gmail.com (mohamed sapry). Yas ---------------------------------------- Bug #15479: Array#reject! modifies literal Array https://bugs.ruby-lang.org/issues/15479#change-115568 * Author: Eregon (Benoit Daloze) * Status: Closed * Assignee: tenderlovemaking (Aaron Patterson) * ruby -v: ruby 2.6.0p0 (2018-12-25 revision 66547) [x86_64-linux] * Backport: 2.4: DONE, 2.5: DONE, 2.6: DONE ---------------------------------------- This was found by running ruby/spec with -R2 (such as mspec -R2 -fs core/array/reject_spec.rb). TravisCI log on https://travis-ci.org/ruby/spec/jobs/473175799#L539 Here is a simple reproducer. MRI seems to modify the Array literal permanently: ```ruby 3.times do a = [1, 2, 3, 4] puts "initial: #{a}" begin a.reject! do |x| case x when 2 then true when 3 then raise StandardError, 'Oops' else false end end rescue StandardError end puts "after: #{a}" end ``` prints ``` initial: [1, 2, 3, 4] after: [1, 3, 4] initial: [1, 3, 4, 4] after: [1, 3, 4, 4] initial: [1, 3, 4, 4] after: [1, 3, 4, 4] ``` 2.5.3 behaves fine, but trunk is also affected. -- https://bugs.ruby-lang.org/