Rails 3: costante non inizializzata IRB :: ReadlineInputMethod :: Readline (NameError) in Heroku

Question

Da quando ci siamo aggiornati su Rails 3.2.13 non siamo stati in grado di avviare la console di heroku rails. Il server sta lavorando bene, ma quando si cerca di eseguire la console, dà il seguente errore:

Loading production environment (Rails 3.2.13) 
/app/vendor/bundle/ruby/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:212:in `const_missing_from_s3_library': uninitialized constant IRB::ReadlineInputMethod::Readline (NameError) 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/input-method.rb:113:in `gets' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:139:in `block (2 levels) in eval_input' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:273:in `signal_status' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:138:in `block in eval_input' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:188:in `call' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:188:in `buf_input' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:103:in `getc' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/slex.rb:205:in `match_io' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/slex.rb:75:in `match' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:286:in `token' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:262:in `lex' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:233:in `block (2 levels) in each_top_level_statement' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `loop' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:229:in `block in each_top_level_statement' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:228:in `catch' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb/ruby-lex.rb:228:in `each_top_level_statement' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:155:in `eval_input' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:70:in `block in start' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:69:in `catch' 
    from /app/vendor/ruby-1.9.3/lib/ruby/1.9.1/irb.rb:69:in `start' 
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands/console.rb:47:in `start' 
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in `start' 
    from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.13/lib/rails/commands.rb:41:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

Che cosa sta succedendo? Grazie!

Answer 1

Ho appena sperimentato questo. Come si scopre, la gemma rb-readline ha urtato una versione che causa la console di rails, e altre cose fallire. Prova a bloccarlo su '~> 0.4.2'.

gem 'rb-readline', '~> 0.4.2'