A literal like 0111 looks like an octal literal in C, but is actually decimal in Rust (octal would be0o111). This is a footgun, and so seems like something that could be trivially checked for.

(I suppose this could be a "clippy" lint, but that seems like it would lose most of the benefit: it seems to me that most people who encounter this will be just starting out, not invested in running external, third-party commands using nightly.)