From: Yui NARUSE <naruse@...>
Date: 2012-01-07T04:25:53+09:00
Subject: [ruby-core:41946] [ruby-trunk - Bug #5262] invalid multibyte escapes should raise a clearer error


Issue #5262 has been updated by Yui NARUSE.


Nagaraj G wrote:
> This issue is not yet fixed ! I am getting the same error message in 1.9.3p0.
> 
> [akshatha@localhost chiliproject]$ ruby -v
> ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]
> 
> [akshatha@localhost chiliproject]$ rails -v
> Rails 2.3.14
> 
> Application: Chiliproject 3.0.0beta + haltr plugin
> 
> Processing InvoicesController#index (for 127.0.0.1 at 2012-01-07 00:19:57) [GET]
> Parameters: {"controller"=>"invoices", "action"=>"index", "id"=>"test-project"}
> Rendering template within layouts/haltr
> Rendering invoices/index
> Completed in 212ms (View: 76, DB: 13) | 200 OK [http://0.0.0.0/invoices/index/test-project]
> Error during failsafe response: "\xE2" on US-ASCII
> [2012-01-07 00:20:01] ERROR NoMethodError: undefined method each' for nil:NilClass
> /home/akshatha/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.1.3/lib/rack/utils.rb:324:ininitialize'
> /home/akshatha/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.1.3/lib/rack/utils.rb:318:in new'
> /home/akshatha/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.1.3/lib/rack/utils.rb:318:innew'
> /home/akshatha/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.1.3/lib/rack/content_length.rb:14:in call'
> /home/akshatha/.rvm/gems/ruby-1.9.3-p0/gems/rack-1.1.3/lib/rack/handler/webrick.rb:48:inservice'
> /home/akshatha/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:138:in service'
> /home/akshatha/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:94:inrun'
> /home/akshatha/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'

It seems different problem, and maybe chiliproject's issue.
----------------------------------------
Bug #5262: invalid multibyte escapes should raise a clearer error
https://bugs.ruby-lang.org/issues/5262

Author: Larry Kyrala
Status: Closed
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]


Here's an irb example of the issue using 'curly-quotes':
 
 ruby-1.9.2-p290 :001 > "���"
 => "���" 
 ruby-1.9.2-p290 :002 > "���".encoding
 => #<Encoding:UTF-8> 
 ruby-1.9.2-p290 :003 > "\���"
 SyntaxError: (irb):3: invalid multibyte char (UTF-8)
 (irb):3: invalid multibyte char (UTF-8)
 	from /local/rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'
 

I don't think anyone would ever do this on purpose. But it can happen accidentally when copying and pasting snippets from  email/text clients.  

Trying to spot this error can be very difficult because curly quotes are valid UTF-8 chars in this case.

I propose that the error be changed to:

 SyntaxError: (irb):3: invalid escape sequence: '\���'.

This would have directed me to the root cause of the problem much sooner.

background on the original rails context here: https://gist.github.com/1184533



-- 
http://redmine.ruby-lang.org