[Rubycocoa-talk] Bus error CFRelease on CGImageSourceRef - no clues?

[Duncan M. <du...@on...>]

Sorry to repost, but this has become a real blocker for me - I thought  
I'd try one last time before giving up and re-coding in ObjC.

I can't persuade RubyCocoa to CFRelease a CGImageSourceRef without a  
bus error - as a result my PDF writing code is leaking like a sieve.

require 'test/unit'
require 'osx/cocoa'

include OSX

class QuartzPDFWriterTest < Test::Unit::TestCase
	
  def setup
    @testdir = TestDir.new(self)
  end
		
  def test_dispose_CGImageSource	
    1.upto(10000) do |i|
      p i
      imageSource =  
CGImageSourceCreateWithURL(NSURL.fileURLWithPath('testdata/pot pourri/ 
blood.jpg'), nil)
      image = CGImageSourceCreateImageAtIndex(imageSource, 0, nil)
      CFRelease image
      CFRelease imageSource
    end
  end
end

CFRelease imageSource results in a segfault or bus error. For low  
iteration counts this happens after the test has finished, increasing  
the count makes it happen during the loop, suggesting a problem during  
garbage collection I think.

If I don't CFRelease imageSource then I run out of memory to load any  
more images after about 4000 iterations with my test file.

Does anyone have any ideas please?

Duncan McGregor