serialize_into corrupts buffer when it fails

[behzadnouri]

The documentation for serialize_into claims that:

If the serialization would take more bytes than allowed by the size limit, an error
is returned and no bytes will be written into the Writer.
https://github.com/bincode-org/bincode/blob/4b6c808db/src/lib.rs#L63-L64

Testing this with some

let mut buffer = vec![u8; 10];
let _ = bincode::serialize_into(&mut buffer[..], &object);

shows that the buffer is mutated even if the serialization fails due to buffer being too small.

[ZoeyR]

The size limit referred to in that documentation is the limit parameter from Options. It looks like this was a copy and paste error from the documentation for the method on the Options trait. This should be made more clear in the docs though since serialize_into at this position takes no config parameter.