[INFO] cloning repository https://github.com/chung92726/try [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chung92726/try" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchung92726%2Ftry", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchung92726%2Ftry'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] f59aaf56d00033ed05683f35f664c1ac71bf9d80 [INFO] checking chung92726/try/f59aaf56d00033ed05683f35f664c1ac71bf9d80 against try#ccf408f4326a858c00dd845a64a86b16f360a801 for pr-129466-2 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchung92726%2Ftry" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/chung92726/try on toolchain ccf408f4326a858c00dd845a64a86b16f360a801 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ccf408f4326a858c00dd845a64a86b16f360a801" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/chung92726/try [INFO] finished tweaking git repo https://github.com/chung92726/try [INFO] tweaked toml for git repo https://github.com/chung92726/try written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/chung92726/try 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" "+ccf408f4326a858c00dd845a64a86b16f360a801" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+ccf408f4326a858c00dd845a64a86b16f360a801" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 14db27abf424d0c75c07505e11c342107d085a456addcb2962d8a55b2127bfa7 [INFO] running `Command { std: "docker" "start" "-a" "14db27abf424d0c75c07505e11c342107d085a456addcb2962d8a55b2127bfa7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "14db27abf424d0c75c07505e11c342107d085a456addcb2962d8a55b2127bfa7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "14db27abf424d0c75c07505e11c342107d085a456addcb2962d8a55b2127bfa7", kill_on_drop: false }` [INFO] [stdout] 14db27abf424d0c75c07505e11c342107d085a456addcb2962d8a55b2127bfa7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+ccf408f4326a858c00dd845a64a86b16f360a801" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5fc3a6d014f395b364cbcf136f02ccb7a1ffc9416cc8273bf76902ccade2b864 [INFO] running `Command { std: "docker" "start" "-a" "5fc3a6d014f395b364cbcf136f02ccb7a1ffc9416cc8273bf76902ccade2b864", kill_on_drop: false }` [INFO] [stderr] Copying to /tmp/fixit [INFO] [stderr] Running `cargo fix --edition` [INFO] [stderr] Migrating Cargo.toml from 2021 edition to 2024 [INFO] [stderr] Compiling serde v1.0.183 [INFO] [stderr] Compiling serde_derive v1.0.183 [INFO] [stderr] Checking zeroize v1.6.0 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling once_cell v1.18.0 [INFO] [stderr] Compiling hashbrown v0.14.0 [INFO] [stderr] Compiling winnow v0.5.4 [INFO] [stderr] Compiling generic-array v0.14.7 [INFO] [stderr] Checking subtle v2.5.0 [INFO] [stderr] Checking const-oid v0.9.4 [INFO] [stderr] Compiling crunchy v0.2.2 [INFO] [stderr] Compiling quote v1.0.32 [INFO] [stderr] Compiling thiserror v1.0.44 [INFO] [stderr] Compiling cc v1.0.82 [INFO] [stderr] Compiling tiny-keccak v2.0.2 [INFO] [stderr] Compiling getrandom v0.2.10 [INFO] [stderr] Checking pin-project-lite v0.2.11 [INFO] [stderr] Checking hex v0.4.3 [INFO] [stderr] Checking der v0.7.7 [INFO] [stderr] Compiling syn v2.0.28 [INFO] [stderr] Compiling proc-macro-error-attr v1.0.4 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Checking 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ethers-middleware v2.0.8 [INFO] [stderr] Checking ethers v2.0.8 [INFO] [stderr] Checking playaround v0.1.0 (/tmp/fixit) [INFO] [stderr] Migrating src/main.rs from 2021 edition to 2024 [INFO] [stderr] Fixed src/main.rs (1 fix) [INFO] [stderr] Fixed src/m8_collections.rs (1 fix) [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/m5_lifetime.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let b = a; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/main.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | let b = a; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `OUR_COURSE` is never used [INFO] [stdout] --> src/main.rs:14:7 [INFO] [stdout] | [INFO] [stdout] 14 | const OUR_COURSE: &str = "Rust Programming Language"; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `CarColour` is never used [INFO] [stdout] --> src/m1_eurms.rs:2:6 [INFO] [stdout] | [INFO] [stdout] 2 | enum CarColour { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `GivenResult` is never used [INFO] [stdout] --> src/m1_eurms.rs:10:6 [INFO] [stdout] | [INFO] [stdout] 10 | enum GivenResult { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `handle_car_colour` is never used [INFO] [stdout] --> src/m1_eurms.rs:15:4 [INFO] [stdout] | [INFO] [stdout] 15 | fn handle_car_colour() -> CarColour { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `check_under_five` is never used [INFO] [stdout] --> src/m1_eurms.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn check_under_five(num_check: u8) -> GivenResult { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `GivenOption` is never used [INFO] [stdout] --> src/m1_eurms.rs:29:6 [INFO] [stdout] | [INFO] [stdout] 29 | enum GivenOption { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `remainder_zero` is never used [INFO] [stdout] --> src/m1_eurms.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn remainder_zero(num_check: f32) -> GivenOption { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `remainder_zero_built_in` is never used [INFO] [stdout] --> src/m1_eurms.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn remainder_zero_built_in(num_check: f32) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `check_under_five_built_in` is never used [INFO] [stdout] --> src/m1_eurms.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn check_under_five_built_in(num_check: u8) -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/m2_struct.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 2 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `change_username` is never used [INFO] [stdout] --> src/m2_struct.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl User { [INFO] [stdout] | --------- method in this implementation [INFO] [stdout] 10 | fn change_username(&mut self, new_username: &str) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Attacker` is never used [INFO] [stdout] --> src/m3_traits.rs:1:7 [INFO] [stdout] | [INFO] [stdout] 1 | trait Attacker { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Character` is never used [INFO] [stdout] --> src/m3_traits.rs:7:6 [INFO] [stdout] | [INFO] [stdout] 7 | enum Character { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `EthereumAddress` is never used [INFO] [stdout] --> src/m4_polymorphism.rs:4:7 [INFO] [stdout] | [INFO] [stdout] 4 | trait EthereumAddress { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_ethereum_data` is never used [INFO] [stdout] --> src/m4_polymorphism.rs:23:4 [INFO] [stdout] | [INFO] [stdout] 23 | fn get_ethereum_data(address: T) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> src/m5_lifetime.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn main() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Message` is never used [INFO] [stdout] --> src/m6_patterns.rs:2:6 [INFO] [stdout] | [INFO] [stdout] 2 | enum Message{ [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `process_message` is never used [INFO] [stdout] --> src/m6_patterns.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn process_message(msg: Message) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `my_async_call` is never used [INFO] [stdout] --> src/m7_async.rs:4:10 [INFO] [stdout] | [INFO] [stdout] 4 | async fn my_async_call(url: &str) -> Result{ [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/m4_polymorphism.rs:25:5 [INFO] [stdout] | [INFO] [stdout] 25 | dbg!(converted_address); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 22 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0412]: cannot find type `HashMap` in this scope [INFO] [stdout] --> src/m8_collections.rs:13:29 [INFO] [stdout] | [INFO] [stdout] 13 | let mut results_hm: HashMap<&str, u32> = HashMap::new(); [INFO] [stdout] | ^^^^^^^ not found in this scope [INFO] [stdout] | [INFO] [stdout] help: consider importing this struct [INFO] [stdout] | [INFO] [stdout] 6 + use std::collections::HashMap; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `HashMap` [INFO] [stdout] --> src/m8_collections.rs:13:50 [INFO] [stdout] | [INFO] [stdout] 13 | let mut results_hm: HashMap<&str, u32> = HashMap::new(); [INFO] [stdout] | ^^^^^^^ use of undeclared type `HashMap` [INFO] [stdout] | [INFO] [stdout] help: consider importing this struct [INFO] [stdout] | [INFO] [stdout] 6 + use std::collections::HashMap; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0412]: cannot find type `HashSet` in this scope [INFO] [stdout] --> src/m8_collections.rs:24:27 [INFO] [stdout] | [INFO] [stdout] 24 | let mut names_hs: HashSet<&str> = HashSet::new(); [INFO] [stdout] | ^^^^^^^ not found in this scope [INFO] [stdout] | [INFO] [stdout] help: consider importing this struct [INFO] [stdout] | [INFO] [stdout] 6 + use std::collections::HashSet; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `HashSet` [INFO] [stdout] --> src/m8_collections.rs:24:43 [INFO] [stdout] | [INFO] [stdout] 24 | let mut names_hs: HashSet<&str> = HashSet::new(); [INFO] [stdout] | ^^^^^^^ use of undeclared type `HashSet` [INFO] [stdout] | [INFO] [stdout] help: consider importing this struct [INFO] [stdout] | [INFO] [stdout] 6 + use std::collections::HashSet; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> src/m8_collections.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused macro definition: `mad_skills` [INFO] [stdout] --> src/m9_decl_marcos.rs:5:18 [INFO] [stdout] | [INFO] [stdout] 5 | macro_rules! mad_skills { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_macros)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the `expr` fragment specifier will accept more expressions in the 2024 edition [INFO] [stdout] --> src/m9_decl_marcos.rs:18:16 [INFO] [stdout] | [INFO] [stdout] 18 | ($($x: expr), +) => { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see Migration Guide [INFO] [stdout] = note: `--force-warn edition-2024-expr-fragment-specifier` implied by `--force-warn rust-2024-compatibility` [INFO] [stdout] help: to keep the existing behavior, use the `expr_2021` fragment specifier [INFO] [stdout] | [INFO] [stdout] 18 | ($($x: expr_2021), +) => { [INFO] [stdout] | ~~~~~~~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/m5_lifetime.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let b = a; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `msg` [INFO] [stdout] --> src/m6_patterns.rs:26:13 [INFO] [stdout] | [INFO] [stdout] 26 | let msg: Message = Message::Quit; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_msg` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `my_colours` [INFO] [stdout] --> src/m6_patterns.rs:27:13 [INFO] [stdout] | [INFO] [stdout] 27 | let my_colours: Message = Message::ChangeColor(0, 0, 0); [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_colours` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `my_move` [INFO] [stdout] --> src/m6_patterns.rs:28:13 [INFO] [stdout] | [INFO] [stdout] 28 | let my_move: Message = Message::Move{x: 10, y: 100}; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_move` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `res` [INFO] [stdout] --> src/m6_patterns.rs:49:13 [INFO] [stdout] | [INFO] [stdout] 49 | let res = if let Some(i) = some_number { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_res` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_err` [INFO] [stdout] --> src/m6_patterns.rs:64:13 [INFO] [stdout] | [INFO] [stdout] 64 | let some_err :Result = Err("There was an problem"); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_err` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `res` [INFO] [stdout] --> src/m6_patterns.rs:66:13 [INFO] [stdout] | [INFO] [stdout] 66 | let res = match some_res { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_res` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/m6_patterns.rs:94:22 [INFO] [stdout] | [INFO] [stdout] 94 | Location{x, y} if y == 0 => println!("Y is on the axis"), [INFO] [stdout] | ^ help: try ignoring the field: `x: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/m6_patterns.rs:95:27 [INFO] [stdout] | [INFO] [stdout] 95 | Location{x:0, y} => println!("X is on the axis"), [INFO] [stdout] | ^ help: try ignoring the field: `y: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/m6_patterns.rs:96:22 [INFO] [stdout] | [INFO] [stdout] 96 | Location{x, y} => println!("X and Y are not on the axis"), [INFO] [stdout] | ^ help: try ignoring the field: `x: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/m6_patterns.rs:96:25 [INFO] [stdout] | [INFO] [stdout] 96 | Location{x, y} => println!("X and Y are not on the axis"), [INFO] [stdout] | ^ help: try ignoring the field: `y: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `res` [INFO] [stdout] --> src/m7_async.rs:24:13 [INFO] [stdout] | [INFO] [stdout] 24 | let res = if let Ok(i) = my_res { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_res` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/m11_smart_pointers.rs:35:13 [INFO] [stdout] | [INFO] [stdout] 35 | let mut x = Rc::new(RefCell::new(50)); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/m11_smart_pointers.rs:57:13 [INFO] [stdout] | [INFO] [stdout] 57 | let mut house_1 = Rc::new(House{ [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/main.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | let b = a; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 4 previous errors; 18 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0412, E0433. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0412`. [INFO] [stdout] [INFO] [stderr] error: could not compile `playaround` (bin "playaround" test) due to 5 previous errors; 18 warnings emitted [INFO] [stderr] error: failed to migrate to next edition [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101) [INFO] running `Command { std: "docker" "inspect" "5fc3a6d014f395b364cbcf136f02ccb7a1ffc9416cc8273bf76902ccade2b864", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5fc3a6d014f395b364cbcf136f02ccb7a1ffc9416cc8273bf76902ccade2b864", kill_on_drop: false }` [INFO] [stdout] 5fc3a6d014f395b364cbcf136f02ccb7a1ffc9416cc8273bf76902ccade2b864