Bug #15442

irb behaves strange in Ruby 2.6

Added by ana06 (Ana Maria Martinez Gomez) over 1 year ago. Updated about 1 year ago.

Target version:
ruby -v:
Ruby 2.6 (trunk)


When trying to press the UP, DOWN, LEFT and RIGHT keys in Ruby 2.6 strange characters are printed instead of moving (or showing the last executed instruction). This works properly for me in Ruby 2.5.

irb(main):004:0> ^[[A^[[A^[[B^[[C^[[D

Updated by aycabta (aycabta .) over 1 year ago

The keyboard line editing behaviors are based on GNU Readline. Please install GNU Readline before you build Ruby.

For example, if you're using Ubuntu 18.10, run sudo apt install libreadline-dev and re-build Ruby.

Updated by mrkn (Kenta Murata) over 1 year ago

You can check the availability of readline by this command line:

ruby -rreadline -ep

Updated by ana06 (Ana Maria Martinez Gomez) over 1 year ago

I think I didn't have current trunk version. It seems to work no. Sorry


Updated by hsbt (Hiroshi SHIBATA) over 1 year ago

  • Status changed from Open to Feedback

Updated by jeremyevans0 (Jeremy Evans) about 1 year ago

  • Status changed from Feedback to Closed

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