[INFO] cloning repository https://github.com/banditpig/AoC_2015_Rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/banditpig/AoC_2015_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbanditpig%2FAoC_2015_Rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbanditpig%2FAoC_2015_Rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c17ec8b7ed670bd99b4299a2c73fb4787a1c2604 [INFO] testing banditpig/AoC_2015_Rust against 1.60.0 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbanditpig%2FAoC_2015_Rust" "/workspace/builds/worker-24/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/banditpig/AoC_2015_Rust on toolchain 1.60.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/banditpig/AoC_2015_Rust [INFO] finished tweaking git repo https://github.com/banditpig/AoC_2015_Rust [INFO] tweaked toml for git repo https://github.com/banditpig/AoC_2015_Rust written to /workspace/builds/worker-24/source/Cargo.toml [INFO] crate git repo https://github.com/banditpig/AoC_2015_Rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c7aafb07f4b29c2f771098b9f161de597561e343235777f4f1cfe8cc1d64b661 [INFO] running `Command { std: "docker" "start" "-a" "c7aafb07f4b29c2f771098b9f161de597561e343235777f4f1cfe8cc1d64b661", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c7aafb07f4b29c2f771098b9f161de597561e343235777f4f1cfe8cc1d64b661", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c7aafb07f4b29c2f771098b9f161de597561e343235777f4f1cfe8cc1d64b661", kill_on_drop: false }` [INFO] [stdout] c7aafb07f4b29c2f771098b9f161de597561e343235777f4f1cfe8cc1d64b661 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 38fe1ceec1e843366f8c28895b3fdca9d2230d0c9e73f060f7c18fa6632eabdb [INFO] running `Command { std: "docker" "start" "-a" "38fe1ceec1e843366f8c28895b3fdca9d2230d0c9e73f060f7c18fa6632eabdb", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.36 [INFO] [stderr] Compiling gcc v0.3.54 [INFO] [stderr] Compiling rustc-serialize v0.3.24 [INFO] [stderr] Compiling rand v0.4.2 [INFO] [stderr] Compiling time v0.1.39 [INFO] [stderr] Compiling rust-crypto v0.2.36 [INFO] [stderr] Compiling rand v0.3.22 [INFO] [stderr] Compiling rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::thread` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::thread; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/day6.rs:129:79 [INFO] [stdout] | [INFO] [stdout] 129 | fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 129 - fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] 129 + fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut dyn Switchable { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/day6.rs:129:53 [INFO] [stdout] | [INFO] [stdout] 129 | fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 129 - fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] 129 + fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut dyn Switchable) -> &'a mut Switchable { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/day6.rs:71:29 [INFO] [stdout] | [INFO] [stdout] 71 | let mut old = self[r][c]; [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: function is never used: `has_duplicates` [INFO] [stdout] --> src/utils.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 11 | pub fn has_duplicates(v: &Vec) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021 [INFO] [stdout] --> src/day5.rs:29:23 [INFO] [stdout] | [INFO] [stdout] 29 | for pair in PAIRS.into_iter() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(array_into_iter)]` on by default [INFO] [stdout] = warning: this changes meaning in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity [INFO] [stdout] | [INFO] [stdout] 29 | for pair in PAIRS.iter() { [INFO] [stdout] | ~~~~ [INFO] [stdout] help: or remove `.into_iter()` to iterate by value [INFO] [stdout] | [INFO] [stdout] 29 - for pair in PAIRS.into_iter() { [INFO] [stdout] 29 + for pair in PAIRS { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 7.99s [INFO] running `Command { std: "docker" "inspect" "38fe1ceec1e843366f8c28895b3fdca9d2230d0c9e73f060f7c18fa6632eabdb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "38fe1ceec1e843366f8c28895b3fdca9d2230d0c9e73f060f7c18fa6632eabdb", kill_on_drop: false }` [INFO] [stdout] 38fe1ceec1e843366f8c28895b3fdca9d2230d0c9e73f060f7c18fa6632eabdb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 88a245f3cd7d28a11e4bd333f7207d80a95378ef5e82319d8d7d9fcecb7059a8 [INFO] running `Command { std: "docker" "start" "-a" "88a245f3cd7d28a11e4bd333f7207d80a95378ef5e82319d8d7d9fcecb7059a8", kill_on_drop: false }` [INFO] [stderr] Compiling rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::thread` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::thread; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/day6.rs:129:79 [INFO] [stdout] | [INFO] [stdout] 129 | fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 129 - fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] 129 + fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut dyn Switchable { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/day6.rs:129:53 [INFO] [stdout] | [INFO] [stdout] 129 | fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 129 - fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stdout] 129 + fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut dyn Switchable) -> &'a mut Switchable { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/day6.rs:71:29 [INFO] [stdout] | [INFO] [stdout] 71 | let mut old = self[r][c]; [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: function is never used: `has_duplicates` [INFO] [stdout] --> src/utils.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 11 | pub fn has_duplicates(v: &Vec) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021 [INFO] [stdout] --> src/day5.rs:29:23 [INFO] [stdout] | [INFO] [stdout] 29 | for pair in PAIRS.into_iter() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(array_into_iter)]` on by default [INFO] [stdout] = warning: this changes meaning in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity [INFO] [stdout] | [INFO] [stdout] 29 | for pair in PAIRS.iter() { [INFO] [stdout] | ~~~~ [INFO] [stdout] help: or remove `.into_iter()` to iterate by value [INFO] [stdout] | [INFO] [stdout] 29 - for pair in PAIRS.into_iter() { [INFO] [stdout] 29 + for pair in PAIRS { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.46s [INFO] running `Command { std: "docker" "inspect" "88a245f3cd7d28a11e4bd333f7207d80a95378ef5e82319d8d7d9fcecb7059a8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "88a245f3cd7d28a11e4bd333f7207d80a95378ef5e82319d8d7d9fcecb7059a8", kill_on_drop: false }` [INFO] [stdout] 88a245f3cd7d28a11e4bd333f7207d80a95378ef5e82319d8d7d9fcecb7059a8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 875083fe3e1c33ae6198da0f839ead9753b6726ba843c7cfce59ce8f9f8ab39b [INFO] running `Command { std: "docker" "start" "-a" "875083fe3e1c33ae6198da0f839ead9753b6726ba843c7cfce59ce8f9f8ab39b", kill_on_drop: false }` [INFO] [stderr] warning: unused import: `std::thread` [INFO] [stdout] [INFO] [stderr] --> src/main.rs:2:5 [INFO] [stdout] running 0 tests [INFO] [stderr] | [INFO] [stdout] [INFO] [stderr] 2 | use std::thread; [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/day6.rs:129:79 [INFO] [stderr] | [INFO] [stderr] 129 | fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 129 - fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stderr] 129 + fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut dyn Switchable { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/day6.rs:129:53 [INFO] [stderr] | [INFO] [stderr] 129 | fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 129 - fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut Switchable) -> &'a mut Switchable { [INFO] [stderr] 129 + fn run_ops_gen<'a, T>(ops: &AllOps, lights: &'a mut dyn Switchable) -> &'a mut Switchable { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/day6.rs:71:29 [INFO] [stderr] | [INFO] [stderr] 71 | let mut old = self[r][c]; [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `has_duplicates` [INFO] [stderr] --> src/utils.rs:11:8 [INFO] [stderr] | [INFO] [stderr] 11 | pub fn has_duplicates(v: &Vec) -> bool { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021 [INFO] [stderr] --> src/day5.rs:29:23 [INFO] [stderr] | [INFO] [stderr] 29 | for pair in PAIRS.into_iter() { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(array_into_iter)]` on by default [INFO] [stderr] = warning: this changes meaning in Rust 2021 [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity [INFO] [stderr] | [INFO] [stderr] 29 | for pair in PAIRS.iter() { [INFO] [stderr] | ~~~~ [INFO] [stderr] help: or remove `.into_iter()` to iterate by value [INFO] [stderr] | [INFO] [stderr] 29 - for pair in PAIRS.into_iter() { [INFO] [stderr] 29 + for pair in PAIRS { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: `rust` (bin "rust" test) generated 6 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/rust-5112376ab7ca24dc) [INFO] running `Command { std: "docker" "inspect" "875083fe3e1c33ae6198da0f839ead9753b6726ba843c7cfce59ce8f9f8ab39b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "875083fe3e1c33ae6198da0f839ead9753b6726ba843c7cfce59ce8f9f8ab39b", kill_on_drop: false }` [INFO] [stdout] 875083fe3e1c33ae6198da0f839ead9753b6726ba843c7cfce59ce8f9f8ab39b