Simple steps to reproduce: - `let g:rustfmt_autosave = 1` - `:w` a rust file with contents: ``` rust fn main() { let foo: Vec<_> = vec![1, 2, 3]; x foo.push(4); } ``` `x` will force an error that will make file contents to be dumped in the command line. This relates with https://github.com/rust-lang/rust.vim/issues/75.