I'm using v1.4.2 w/ ruby 2.7.2 and have software that is trying to read msgpack files produced by a different application.

On Linux, all of the msgpack files are unpacked successfully, while on Windows, some msgpack files are successfully unpacked while others produce an "end of buffer reached" error. It is 100% reproducible.

I am unpacking the msgpack files like so:

require 'msgpack'
MessagePack.unpack(File.read('foo.msgpack'))

This file is unpacked successfully on both Windows and Linux.

This file is unpacked successfully on Linux but gives an error on Windows:

end of buffer reached in :/ruby/2.7.0/gems/msgpack-1.4.2/lib/msgpack.rb:33:in `full_unpack'
:/ruby/2.7.0/gems/msgpack-1.4.2/lib/msgpack.rb:33:in `load'