[MacRuby-devel] [macruby] #108: Exception parsing XML file using REXML

4 Aug 2008

      #108: Exception parsing XML file using REXML
----------------------------------+-----------------------------------------
 Reporter:  jon.lipsky@gmail.com  |       Owner:  lsansonetti@apple.com
     Type:  defect                |      Status:  new                  
 Priority:  blocker               |   Milestone:                       
Component:  MacRuby               |    Keywords:                       
----------------------------------+-----------------------------------------
 Hi,

 I am getting a "Can't modify immutable string" exception when trying to
 parse an XML document using the streaming parser included with REXML.  I
 have created a sample script and sample XML file to reproduce the problem:

 {{{
 require "rexml/document"
 require "rexml/streamlistener"

 include REXML

 class Reader
   include StreamListener

   def tag_start(a_name, a_attributes)
       puts(a_name + " - " + a_attributes.to_s)
   end
 end

 reader = Reader.new
 file = File.open("test.xml",File::RDONLY)
 Document.parse_stream(file, reader)
 }}}

 {{{
 <?xml version="1.0" encoding="UTF-8"?>
 <test>

 </test>
 }}}

 Here is the stack trace that is generated:

 {{{
 /Library/Frameworks/MacRuby.framework/Versions/0.3/usr/lib/ruby/1.9.0/rexml/parsers/baseparser.rb:260:in
 `force_encoding': can't modify immutable string (RuntimeError)
         from
 /Library/Frameworks/MacRuby.framework/Versions/0.3/usr/lib/ruby/1.9.0/rexml/parsers/baseparser.rb:260:in
 `pull'
         from
 /Library/Frameworks/MacRuby.framework/Versions/0.3/usr/lib/ruby/1.9.0/rexml/parsers/streamparser.rb:16:in
 `parse'
         from
 /Library/Frameworks/MacRuby.framework/Versions/0.3/usr/lib/ruby/1.9.0/rexml/document.rb:200:in
 `parse_stream'
         from /Development/personal/ruby/rbface/src/rb/rexml_test.rb:16:in
 `<main>'
 }}}

 Thanks and best regards,
 Jon...

-- 
Ticket URL: <https://www.macruby.org/trac/ticket/108>
macruby <http://macruby.org/>