Issue #9204 has been updated by noniq (Stefan Daschek).


Indeed, but unfortunately it???s a badly documented choice with rather surprising consequences: Compiling Ruby works seemingly without any problems, and you may use Ruby for several days or even months before noticing the issue. And then it???s quite hard to find out that this has something todo with the way you initially compiled Ruby.

Could there at least be a big warning when compiling with libedit, saying something like ???Warning: This build uses libedit instead of readline. You will not be able to use accented characters in irb.???? Dave Thomas already suggested this back in 2009: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/21277

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Bug #9204: Issues when compiled with libedit instead of readline
https://bugs.ruby-lang.org/issues/9204#change-43413

Author: noniq (Stefan Daschek)
Status: Third Party's Issue
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.1.0dev (2013-11-23 trunk 43807) [x86_64-darwin13.0
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


Compiling Ruby on Mac OS X uses BSD libedit instead of GNU readline, leading to various problems. Most notably: With libedit it???s not possible to input accented characters (e.g. ??????) in irb or pry:
  
 $ irb # Ruby 2.1.0-preview2
 irb(main):001:0> "a \U+FFC3\U+FFA4" # typing 'a รค' results in this weird escape sequence
 => "a "

This issue has already been mentioned on ruby-core in 2009, but with no apparent result: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/21259

This shows up quite often, usually it???s suggested to manually install GNU readline before compiling Ruby (and making sure readline is actually found and used when configuring / compiling):

https://github.com/guard/guard/wiki/Add-Readline-support-to-Ruby-on-Mac-OS-X
https://github.com/wayneeseguin/rvm/issues/1016
http://jorgebernal.info/2009/11/18/fixing-snow-leopard-ruby-readline/

Maybe Ruby could bundle readline to avoid this kind of issues? 


-- 
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