two separate but identical versions of a crate in dependency tree

[brenzi]

I get the following funny behaviour:

> cargo tree  -i -p untrusted
error: There are multiple `untrusted` packages in your project, and the specification `untrusted` is ambiguous.
Please re-run this command with `-p <spec>` where `<spec>` is one of the following:
  https://github.com/briansmith/untrusted#0.6.2
  https://github.com/briansmith/untrusted#0.6.2

As you see, the versions are identical but cargo seems not to realize that

This issue causes errors like

  --> /home/brenzi/.cargo/registry/src/github.com-1ecc6299db9ec823/libp2p-core-0.7.1/src/identity/rsa.rs:74:27
   |
74 |                           Input::from(msg),
   |                           ^^^^^^^^^^^^^^^^ expected struct `untrusted::Input`, found a different struct `untrusted::Input`
   |
   = note: expected type `untrusted::Input<'_>` (struct `untrusted::Input`)
              found type `untrusted::Input<'_>` (struct `untrusted::Input`)
note: Perhaps two different versions of crate `untrusted` are being used?

I assume this is caused by a patch statement in workspace Cargo.toml

...
[patch.crates-io]
untrusted = { git = "https://github.com/briansmith/untrusted" }
...

which is needed because otherwise two truly different versions of untrusted would collide.

Here's my repo showing this behaviour: https://github.com/scs/substraTEE-worker/tree/brenzi-ra

[brenzi]

This is related to rust-lang/cargo#6961

And actually, I should've filed the issue with cargo, not with rust. Sorry

[Mark-Simulacrum]

Closing, please refile as a Cargo issue if this is still a problem (or followup on rust-lang/cargo#6961).