[tomjakubowski]

and tempfile is not even used as a runtime dependency. It is only ever called, or even linked, in tests.

(by the way, Herman, much belated thanks for putting together the original Rust LA meetup all those years ago!)

[luckystarr]

Curious: Does cargo not distinguish between dev and runtime dependencies?

[steveklabnik]

It does, but all dependencies are put in the same folder, which is why the original poster conflated them.

If you look at the linked Cargo.toml you'll see

  [dependencies]
  libc = "0.2.139"
  <snip>

  [dev-dependencies]
  pretty_assertions = "1.3.0"
  tempfile = "3.5.0"