Using two version of the same crate gives confusing message · Issue #109161 · rust-lang/rust (original) (raw)
Code
// main.rs use prio::codec::Decode;
use janus_messages::HpkeConfig;
fn main() { let foo = [0u8; 100]; HpkeConfig::get_decoded(&foo); }
// Cargo.toml [package] name = "dap-test" version = "0.1.0" edition = "2021"
[dependencies] janus_messages = "0.3.1" # note this depends on prio 0.10! prio = "0.9.1"
Current output
error[E0599]: no function or associated item named get_decoded found for struct HpkeConfig in the current scope
--> src/main.rs:7:17
|
7 | HpkeConfig::get_decoded(&foo);
| ^^^^^^^^^^^ function or associated item not found in HpkeConfig
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a use for it:
|
1 | use prio::codec::Decode;
|
warning: unused import: prio::codec::Decode
--> src/main.rs:1:5
|
1 | use prio::codec::Decode;
| ^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
For more information about this error, try rustc --explain E0599.
Desired output
error[E0599]: no function or associated item named get_decoded found for struct HpkeConfig in the current scope
--> src/main.rs:7:17
|
7 | HpkeConfig::get_decoded(&foo);
| ^^^^^^^^^^^ function or associated item not found in HpkeConfig
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a use for it:
|
1 | use prio(0.10.0)::codec::Decode;
|
warning: unused import: prio::codec::Decode
--> src/main.rs:1:5
|
1 | use prio(0.9.1)::codec::Decode;
| ^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default
For more information about this error, try rustc --explain E0599.
(#IIUC: Include the version number that causes those two Decode objects to be different.)
Rationale and extra context
Afaiu this is caused by a impl TraitFoo for StructBar in CrateBar which depends on CrateFoo (which has the trait) and then trying to use a function on TraitFoo on a StructBar from the main project which depends on a different version of CrateFoo. In that case it would help to add the version number.
Other cases
No response
Anything else?
No response