1 error[E0433]: failed to resolve: maybe a missing crate `core`?
2 --> $DIR/issue-102156.rs:4:5
4 LL | use core::convert::{From, TryFrom};
5 | ^^^^ maybe a missing crate `core`?
7 = help: consider adding `extern crate core` to use the `core` crate
9 error[E0433]: failed to resolve: maybe a missing crate `core`?
10 --> $DIR/issue-102156.rs:4:5
12 LL | use core::convert::{From, TryFrom};
13 | ^^^^ maybe a missing crate `core`?
15 = help: consider adding `extern crate core` to use the `core` crate
17 error: aborting due to 2 previous errors
19 For more information about this error, try `rustc --explain E0433`.