Environment

Provide at least:

• JRuby 9.1.5.0
• macOS 10.12.1 developer beta

Expected Behavior

Zlib should produce the same output as MRI given the same input.

I need to consistently generate same binary data in both MRI and JRuby.

Actual Behavior

In most cases Zlib actually generates the same output but in one case it does not. I don't know what is different. The output seem to be valid but I need consistency between implementations, too. I tried both compact syntax and a more explicit one.

 Zlib::Deflate.deflate(data)

z = Zlib::Deflate.new(
  Zlib::DEFAULT_COMPRESSION,
  Zlib::MAX_WBITS,
  Zlib::DEF_MEM_LEVEL,
  Zlib::HUFFMAN_ONLY
)
compressed_data = z.deflate(data, Zlib::FINISH)
z.close

They both produce output different to MRI.

Here's example data: data.bin.zip. The file is zipped because GH doesn't allow random files to be uploaded.