Unknown option: cfg

[zenixls2]

• rust.vim version: git commit f45cdae
  Steps to reproduce:

mine installation is through vim-plug.
by changing the order of these two lines, different results will occur:

Plug 'rust-lang/rust.vim'
Plug 'cespare/vim-toml'

Expected vs. actual behavior:

if vim-toml is loaded before rust.vim, no error will occur.
otherwise, vim will output something like:

"Cargo.toml" 10L, 252C
Error detected while processing FileType Auto commands for "*":
E518: Unknown option: cfg

and vim-toml will be ignored (no color for the script).
The error message is produced by this line
vim version is

VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Sep 18 2016 14:42:40)

Paste debugging info from the Rust Vim plugin via one of the following
commands: :RustInfo, :RustInfoToClipboard, or :RustInfoToFile <filename>.

these won't work.

[mhinz]

You didn't mention the Included patches bit from vim --version, but you probably have a version older than 8.0.0613, which is the commit that introduced the FALLBACK syntax.

As for the order issue: When cespare/vim-toml is run first, it sets the filetype to toml and thus the :setfiletype from this plugin will return early without ever processing its arguments.

[zenixls2]

the version I used is 8.0.003-1 provided in Ghettoforge Plus repo in CentOS 7.
the default verson in main repo is at 7.4

Is there any possibility to do the version check before to prevent this issue?
Or maybe we need to add a dependency requirement of version 8.0.0613 in README.

[mhinz]

The above PR should fix it for you.