| error: call to deprecated safe function `std::env::set_var` is unsafe and requires unsafe block | 
 |   --> $DIR/unsafe-env-suggestion.rs:9:5 | 
 |    | | 
 | LL |     env::set_var("FOO", "BAR"); | 
 |    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function | 
 |    | | 
 |    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2024! | 
 |    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/newly-unsafe-functions.html> | 
 | note: the lint level is defined here | 
 |   --> $DIR/unsafe-env-suggestion.rs:3:9 | 
 |    | | 
 | LL | #![deny(deprecated_safe_2024)] | 
 |    |         ^^^^^^^^^^^^^^^^^^^^ | 
 | help: you can wrap the call in an `unsafe` block if you can guarantee that the environment access only happens in single-threaded code | 
 |    | | 
 | LL +     // TODO: Audit that the environment access only happens in single-threaded code. | 
 | LL ~     unsafe { env::set_var("FOO", "BAR") }; | 
 |    | | 
 |  | 
 | error: call to deprecated safe function `std::env::remove_var` is unsafe and requires unsafe block | 
 |   --> $DIR/unsafe-env-suggestion.rs:12:5 | 
 |    | | 
 | LL |     env::remove_var("FOO"); | 
 |    |     ^^^^^^^^^^^^^^^^^^^^^^ call to unsafe function | 
 |    | | 
 |    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2024! | 
 |    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/newly-unsafe-functions.html> | 
 | help: you can wrap the call in an `unsafe` block if you can guarantee that the environment access only happens in single-threaded code | 
 |    | | 
 | LL +     // TODO: Audit that the environment access only happens in single-threaded code. | 
 | LL ~     unsafe { env::remove_var("FOO") }; | 
 |    | | 
 |  | 
 | error: aborting due to 2 previous errors | 
 |  |