BUG: Instantiating ChunkingPNG::Canvas on decode_png_with_adam7_interlacing() prevents it from being able to obtain metadata from DataStream.
BUG: Instantiating ChunkingPNG::Canvas on decode_png_with_adam7_interlacing() prevents it from being able to obtain metadata from DataStream.

lencioni/chunky_png,bshakr/chunky_png,wvanbergen/chunky_png,travis-repos/chunky_png