ChunkyPNG::Image from_datastream method

[didip]

def self.from_datastream(ds)
  image = super(ds)
  image.metadata = ds.metadata
  return image
end

We had this bug where metadata is not defined on instance of ChunkyPNG::Canvas. Which is correct. (There is no metadata attribute on ChunkyPNG::Canvas).

Commenting out the following fixes our bug.
image.metadata = ds.metadata

Should ChunkyPNG::Canvas instance have metadata attribute?

[wvanbergen]

The idea is that the Canvas class only handles pixel data. The image class handles other aspects that can be part of a PNG image (currently only metadata). SO it is correct that the Canvas class does not have the metadata member.

The question remains how you got this error. Do you have a code snippet that reproduces this issue?

[didip]

We have just a plain ol' .scss file. See the following:

#buy_and_activity_feed { float: left;
  #like_event { height: 108px; }
  #activity { width: 206px; height: 317px; background: sprite-image("home/activity_feed.png") no-repeat; }
}

We of course use ChunkyPNG via Lemonade. The sprite css fails to generate because of this error.

[didip]

If it helps, I've attached the following stacktrace:

NoMethodError on line 40 of /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/chunky_png-0.9.0/lib/chunky_png/image.rb: undefined method `metadata=' for #<ChunkyPNG::Canvas:0x101129600>
  /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/chunky_png-0.9.0/lib/chunky_png/canvas/png_decoding.rb:50:in `from_file'
  /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/lemonade-0.3.4/lib/lemonade/lemonade.rb:9:in `generate_sprites'
  /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/lemonade-0.3.4/lib/lemonade/lemonade.rb:7:in `each'
  /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/lemonade-0.3.4/lib/lemonade/lemonade.rb:7:in `generate_sprites'
  /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/lemonade-0.3.4/lib/lemonade/lemonade.rb:4:in `each'
  /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/lemonade-0.3.4/lib/lemonade/lemonade.rb:4:in `generate_sprites'
  /Users/didip/.rvm/gems/ree-1.8.7-2010.02/gems/lemonade-0.3.4/lib/lemonade.rb:59:in `render'

[wvanbergen]

Fixed by yourself. Thanks!