Comment # 3 on bug 1181779 from Guillaume GARDET

(In reply to Martin Sirringhaus from comment #2)
> The newest version of rust-packaging on Factory has this line in its
> changelog:
> 
>   + Fix up Cargo.toml.orig error message that started to appear with Rust
> 1.43.0
> 
> So the package needs to be updated on Leap it seems.

I submitted an update to Backports:
https://build.opensuse.org/request/show/873784