Hello,

I'm working on libuv ffi bindings for Ruby and have an issue I can't
understand

Libuv needs an allocated buffer it can write to, here is a gist of
code https://gist.github.com/2313277 that has my ruby module and usage
examples both in C and Ruby
The C example works fine, while ruby makes Libuv raise EINVAL. I've
used some basic debugging and figured out that the buffer len than
comes from Ruby is 140735085305696
instead of 128, as can be seen from shell outputs examples I've added
to the gist. I've also added relevant pieces of Libuv to the gist,
specifically uv_buf_init that is
responsible for creating uv_buf_t and part of libuv's uv__read that is
responsible for using it.

From my debugging it looks like a corrupted uv_buf_t memory comes back
from Ruby, making libuv believe beffer's len attribute is
140735085305696 bytes long.

I will appreciate any feedback as I've been struggling with this for a
while.

Best,
Bulat