Issue #17680 has been updated by jeremyevans0 (Jeremy Evans). Status changed from Open to Closed This change from 2.5 is expected due to differences between reline and readline. As readline has been removed from stdlib, reline's behavior is now the only available behavior. Behavior is the same on JRuby. It's possible a pull request to reline to have tab completion behavior more compatible to readline may be considered, but that would be up to the reline maintainer. ---------------------------------------- Bug #17680: tab completion no longer works on irb3.0 https://bugs.ruby-lang.org/issues/17680#change-103054 * Author: simondedeo (Simon DeDeo) * Status: Closed * Priority: Normal * ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-darwin16] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN ---------------------------------------- in irb2.5: rb(main):001:0> source 'li [then I hit tab...] linking.rb list_load.rb list_load_OLD.rb irb(main):001:0> source 'lis [then I hit tab again...] list_load.rb list_load_OLD.rb irb(main):001:0> source 'list_load.rb' [then I hit tab again...] in irb3.0, hitting tab after typing "source 'li" gives. irb(main):001:0' source 'li' Here are my version numbers: ayerie:simon$ irb3.0 -v irb 1.3.0 (2020-12-25) ayerie:CHLOE simon$ ruby3.0 -v ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-darwin16] ayerie:simon$ -- https://bugs.ruby-lang.org/