[INFO] cloning repository https://github.com/zjjfly/DiveIntoRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zjjfly/DiveIntoRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzjjfly%2FDiveIntoRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzjjfly%2FDiveIntoRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 877c1bb705bbbb02f97fe5b709a24db219a45d2c
[INFO] fixing zjjfly/DiveIntoRust against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=end=2015,2024 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzjjfly%2FDiveIntoRust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zjjfly/DiveIntoRust
[INFO] finished tweaking git repo https://github.com/zjjfly/DiveIntoRust
[INFO] tweaked toml for git repo https://github.com/zjjfly/DiveIntoRust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zjjfly/DiveIntoRust on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zjjfly/DiveIntoRust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649
[INFO] running `Command { std: "docker" "start" "f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=end=2015,2024", kill_on_drop: false }`
[INFO] [stderr] crater-edition-check: migrating to next edition
[INFO] [stderr]    Migrating Cargo.toml from 2018 edition to 2021
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking dive_into_format v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] [stderr] crater-edition-check: dive_into_format v0.1.0 (/opt/rustwide/workdir) updating edition from 2018 to 2021
[INFO] [stderr]     Checking dive_into_format v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![feature]`
[INFO] [stdout]   --> src/ch4/function.rs:60:1
[INFO] [stdout]    |
[INFO] [stdout] 60 | #[feature(const_fn)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: this attribute does not have an `!`, which means it is applied to this function
[INFO] [stdout]   --> src/ch4/function.rs:61:1
[INFO] [stdout]    |
[INFO] [stdout] 61 | / const fn cube(num: usize) -> usize {
[INFO] [stdout] 62 | |     num * num * num
[INFO] [stdout] 63 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![feature]`
[INFO] [stdout]   --> src/ch4/function.rs:60:1
[INFO] [stdout]    |
[INFO] [stdout] 60 | #[feature(const_fn)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: this attribute does not have an `!`, which means it is applied to this function
[INFO] [stdout]   --> src/ch4/function.rs:61:1
[INFO] [stdout]    |
[INFO] [stdout] 61 | / const fn cube(num: usize) -> usize {
[INFO] [stdout] 62 | |     num * num * num
[INFO] [stdout] 63 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add1` is never used
[INFO] [stdout]  --> src/ch4/function.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add1(t: (i32, i32)) -> i32 {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add2` is never used
[INFO] [stdout]  --> src/ch4/function.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn add2((x, y): (i32, i32)) -> i32 {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cube` is never used
[INFO] [stdout]   --> src/ch4/function.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 | const fn cube(num: usize) -> usize {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/ch4/function.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let x: i32 = diverges();
[INFO] [stdout]    |                  ---------- any code following this expression is unreachable
[INFO] [stdout] 55 |     let y: String = diverges();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Err(err) => println!("environment variable {} not found!", "SHELL")
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ch4/function.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut func = add1;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]   --> src/ch4/function.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut func = add1;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `func` is assigned to, but never used
[INFO] [stdout]   --> src/ch4/function.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut func = add1 as fn((i32, i32)) -> i32;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_func` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `func` is assigned to, but never used
[INFO] [stdout]   --> src/ch4/function.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut func: fn((i32, i32)) -> i32 = add1;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_func` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `func` is never read
[INFO] [stdout]   --> src/ch4/function.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     func = add2;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `func` is never read
[INFO] [stdout]   --> src/ch4/function.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     func = add2;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/ch4/function.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let x: i32 = diverges();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> src/ch2/variable.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 |         println!("{}", G2);
[INFO] [stdout]    |                        ^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Err(err) => println!("environment variable {} not found!", "SHELL")
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stderr] crater-edition-check: migrating to next edition
[INFO] [stderr]    Migrating Cargo.toml from 2018 edition to 2021
[INFO] [stderr]     Checking dive_into_format v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Migrating src/lib.rs from 2021 edition to 2024
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> src/ch2/variable.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 |         println!("{}", G2);
[INFO] [stdout]    |                        ^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `--force-warn static-mut-refs` implied by `--force-warn rust-2024-compatibility`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Migrating src/main.rs from 2021 edition to 2024
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.28s
[INFO] [stderr] crater-edition-check: dive_into_format v0.1.0 (/opt/rustwide/workdir) updating edition from 2021 to 2024
[INFO] [stderr]     Checking dive_into_format v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![feature]`
[INFO] [stdout]   --> src/ch4/function.rs:60:1
[INFO] [stdout]    |
[INFO] [stdout] 60 | #[feature(const_fn)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: this attribute does not have an `!`, which means it is applied to this function
[INFO] [stdout]   --> src/ch4/function.rs:61:1
[INFO] [stdout]    |
[INFO] [stdout] 61 | / const fn cube(num: usize) -> usize {
[INFO] [stdout] 62 | |     num * num * num
[INFO] [stdout] 63 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add1` is never used
[INFO] [stdout]  --> src/ch4/function.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add1(t: (i32, i32)) -> i32 {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add2` is never used
[INFO] [stdout]  --> src/ch4/function.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn add2((x, y): (i32, i32)) -> i32 {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cube` is never used
[INFO] [stdout]   --> src/ch4/function.rs:61:10
[INFO] [stdout]    |
[INFO] [stdout] 61 | const fn cube(num: usize) -> usize {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Err(err) => println!("environment variable {} not found!", "SHELL")
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/main.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Err(err) => println!("environment variable {} not found!", "SHELL")
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be an inner attribute: add an exclamation mark: `#![feature]`
[INFO] [stdout]   --> src/ch4/function.rs:60:1
[INFO] [stdout]    |
[INFO] [stdout] 60 | #[feature(const_fn)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: this attribute does not have an `!`, which means it is applied to this function
[INFO] [stdout]   --> src/ch4/function.rs:61:1
[INFO] [stdout]    |
[INFO] [stdout] 61 | / const fn cube(num: usize) -> usize {
[INFO] [stdout] 62 | |     num * num * num
[INFO] [stdout] 63 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/ch4/function.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let x: i32 = diverges();
[INFO] [stdout]    |                  ---------- any code following this expression is unreachable
[INFO] [stdout] 55 |     let y: String = diverges();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ch4/function.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut func = add1;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]   --> src/ch4/function.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut func = add1;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `func` is assigned to, but never used
[INFO] [stdout]   --> src/ch4/function.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut func = add1 as fn((i32, i32)) -> i32;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_func` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `func` is assigned to, but never used
[INFO] [stdout]   --> src/ch4/function.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut func: fn((i32, i32)) -> i32 = add1;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_func` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `func` is never read
[INFO] [stdout]   --> src/ch4/function.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     func = add2;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `func` is never read
[INFO] [stdout]   --> src/ch4/function.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     func = add2;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/ch4/function.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let x: i32 = diverges();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: creating a shared reference to mutable static
[INFO] [stdout]   --> src/ch2/variable.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 |         println!("{}", G2);
[INFO] [stdout]    |                        ^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[deny(static_mut_refs)]` (part of `#[deny(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dive_into_format` (lib test) due to 1 previous error; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649", kill_on_drop: false }`
[INFO] [stdout] f6ad71ade071cfb423ea920745cda8642f3647c5a902d72353e4fbd492ce7649
