Error loading inputrc when file encoding does not match to Encoding.default_external

[chmaynard]

Description

Using Homebrew, I installed Ruby 3.1 on a Mac running macOS 12.

When I attempt to run irb from the command line using Terminal 2.12, I get this error:

/usr/local/Cellar/ruby/3.1.0/lib/ruby/3.1.0/reline/config.rb:203:in `match': invalid byte sequence in UTF-8 (ArgumentError)

[ima1zumi]

There seems to be an error at the point where the .inputrc is loaded.
Would you post your .inputrc?

[chmaynard]

See https://gist.github.com/chmaynard/40e32fc1f302c48cab7f7168ace80c91

[ima1zumi]

I looked into this issue. But I could not reproduce it. ( macOS 10.15.7 & Terminal 2.10 & Ruby 3.2.0-dev )
In my terminal, it showed up like this.

Apart from that, Reline does not seem to be able to support self-insert.

❯ INPUTRC=.inputrc ASDF_RUBY_VERSION=3.2.0-dev ruby -I /Users/mi/ghq/github.com/ruby/reline/lib -I /Users/mi/ghq/github.com/ruby/irb/lib /Users/mi/ghq/github.com/ruby/irb/exe/irb
irb(main):001:0> 
/Users/mi/ghq/github.com/ruby/reline/lib/reline/line_editor.rb:2024:in `ed_insert': undefined method `chr' for :self_insert:Symbol (NoMethodError)

        key.chr.encode(Encoding::UTF_8)
           ^^^^
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline/line_editor.rb:1492:in `call'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline/line_editor.rb:1492:in `wrap_method_call'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline/line_editor.rb:1509:in `process_key'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline/line_editor.rb:1647:in `input_key'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:330:in `block (3 levels) in inner_readline'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:328:in `each'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:328:in `block (2 levels) in inner_readline'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:388:in `block in read_io'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:374:in `loop'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:374:in `read_io'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:326:in `block in inner_readline'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:324:in `loop'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:324:in `inner_readline'
        from /Users/mi/ghq/github.com/ruby/reline/lib/reline.rb:254:in `readmultiline'
        from /Users/mi/.asdf/installs/ruby/3.2.0-dev/lib/ruby/3.2.0/forwardable.rb:238:in `readmultiline'
        from /Users/mi/.asdf/installs/ruby/3.2.0-dev/lib/ruby/3.2.0/forwardable.rb:238:in `readmultiline'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb/input-method.rb:417:in `gets'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:539:in `block (2 levels) in eval_input'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:770:in `signal_status'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:538:in `block in eval_input'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb/ruby-lex.rb:284:in `lex'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb/ruby-lex.rb:253:in `block (2 levels) in each_top_level_statement'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb/ruby-lex.rb:250:in `loop'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb/ruby-lex.rb:250:in `block in each_top_level_statement'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb/ruby-lex.rb:249:in `catch'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb/ruby-lex.rb:249:in `each_top_level_statement'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:557:in `eval_input'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:491:in `block in run'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:490:in `catch'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:490:in `run'
        from /Users/mi/ghq/github.com/ruby/irb/lib/irb.rb:419:in `start'
        from /Users/mi/ghq/github.com/ruby/irb/exe/irb:11:in `<main>'

[tompng]

To reproduce

Add a multibyte character to .inputrc in some encoding.
Then launtch irb with another encoding.

$ ruby -e "File.write 'dummy_inputrc', '#∞'.encode('sjis')"
$ INPUTRC=dummy_inputrc irb -Eutf-8
reline/lib/reline/config.rb:174:in `match': invalid byte sequence in UTF-8 (ArgumentError)

$ echo '#∞' > dummy_inputrc
$ INPUTRC=dummy_inputrc irb -Esjis
reline/lib/reline/config.rb:174:in `match': invalid byte sequence in Windows-31J (ArgumentError)