[MacRuby-devel] [MacRuby] #736: Unpack inconsistencies (possibly related to issue #605?)

4 Jun 2010

      #736: Unpack inconsistencies (possibly related to issue #605?)
---------------------------------+------------------------------------------
 Reporter:  babs.devs@…          |       Owner:  lsansonetti@…        
     Type:  defect               |      Status:  new                  
 Priority:  major                |   Milestone:                       
Component:  MacRuby              |    Keywords:  Grit, unpack         
---------------------------------+------------------------------------------
 I am attempting to use the Grit(http://github.com/mojombo/grit) gem (after
 various patches to work w/ macruby), but there seems to be some
 inconsistency between unpacking strings w ruby 1.9 and MacRuby (nightly as
 of 6/3/10).

 Specifically with this method:
 {{{
     def init_pack
           with_idx do |idx|
             @offsets = [0]
             FanOutCount.times do |i|
               //MacRuby vs Ruby assign VERY different values to pos
               pos = idx[i * IdxOffsetSize,IdxOffsetSize].unpack('N')[0]
               if pos < @offsets[i]
                 raise PackFormatError, "pack #@name has discontinuous
 index #{i}"
               end
               @offsets << pos
             end
             @size = @offsets[-1]
           end
         end
 }}}
 In MacRuby the var 'pos' evaluates to [0, 4285812579] in every other
 block.

 In Ruby 1.9 'pos' evaluates correctly (ex. after 7 blocks: [0, 11, 24, 39,
 48, 56, 63])

 This bug may be invalid, and/or related to the Grit gem, but at first
 glance appears to be MacRuby related.

 @see also: http://www.macruby.org/trac/ticket/605

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/736>
MacRuby <http://macruby.org/>