[INFO] cloning repository https://github.com/LearningOS/rust-rustlings-2024-spring-AbnerZheng [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LearningOS/rust-rustlings-2024-spring-AbnerZheng" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2024-spring-AbnerZheng", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2024-spring-AbnerZheng'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ef88ef2c3775f3e6e527caa15174bf7e53d4ad6b [INFO] checking LearningOS/rust-rustlings-2024-spring-AbnerZheng/ef88ef2c3775f3e6e527caa15174bf7e53d4ad6b against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLearningOS%2Frust-rustlings-2024-spring-AbnerZheng" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/LearningOS/rust-rustlings-2024-spring-AbnerZheng on toolchain 4d98531622e1718ae0bc3c7a1ab9cd8938428452 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/LearningOS/rust-rustlings-2024-spring-AbnerZheng [INFO] finished tweaking git repo https://github.com/LearningOS/rust-rustlings-2024-spring-AbnerZheng [INFO] tweaked toml for git repo https://github.com/LearningOS/rust-rustlings-2024-spring-AbnerZheng written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/LearningOS/rust-rustlings-2024-spring-AbnerZheng 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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7e677441307dbddd7702dbc5b3ea8a020c04132f82329b3e283ff1f02d3046cb [INFO] running `Command { std: "docker" "start" "-a" "7e677441307dbddd7702dbc5b3ea8a020c04132f82329b3e283ff1f02d3046cb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7e677441307dbddd7702dbc5b3ea8a020c04132f82329b3e283ff1f02d3046cb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7e677441307dbddd7702dbc5b3ea8a020c04132f82329b3e283ff1f02d3046cb", kill_on_drop: false }` [INFO] [stdout] 7e677441307dbddd7702dbc5b3ea8a020c04132f82329b3e283ff1f02d3046cb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail_expr_drop_order" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7d355ef2bfec565401e30ffa0fa2bc9a8d689899960e3eea3639fa2981c2a3a9 [INFO] running `Command { std: "docker" "start" "-a" "7d355ef2bfec565401e30ffa0fa2bc9a8d689899960e3eea3639fa2981c2a3a9", kill_on_drop: false }` [INFO] [stderr] Checking rustlings v5.5.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: struct `Stack` is never constructed [INFO] [stdout] --> src/algorithm5.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | struct Stack { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: multiple associated items are never used [INFO] [stdout] --> src/algorithm5.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl Stack { [INFO] [stdout] | ---------------- associated items in this implementation [INFO] [stdout] 12 | fn new() -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 18 | fn is_empty(&self) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 21 | fn len(&self) -> usize { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 24 | fn clear(&mut self) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 28 | fn push(&mut self, val: T) { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 32 | fn pop(&mut self) -> Option { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 37 | fn peek(&self) -> Option<&T> { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 43 | fn peek_mut(&mut self) -> Option<&mut T> { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 49 | fn into_iter(self) -> IntoIter { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 52 | fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 59 | fn iter_mut(&mut self) -> IterMut { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `IntoIter` is never constructed [INFO] [stdout] --> src/algorithm5.rs:67:8 [INFO] [stdout] | [INFO] [stdout] 67 | struct IntoIter(Stack); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Iter` is never constructed [INFO] [stdout] --> src/algorithm5.rs:79:8 [INFO] [stdout] | [INFO] [stdout] 79 | struct Iter<'a, T: 'a> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `IterMut` is never constructed [INFO] [stdout] --> src/algorithm5.rs:88:8 [INFO] [stdout] | [INFO] [stdout] 88 | struct IterMut<'a, T: 'a> { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `bracket_match` is never used [INFO] [stdout] --> src/algorithm5.rs:98:4 [INFO] [stdout] | [INFO] [stdout] 98 | fn bracket_match(bracket: &str) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/exercise.rs:29:10 [INFO] [stdout] | [INFO] [stdout] 29 | #[derive(Deserialize, Copy, Clone, Debug)] [INFO] [stdout] | ^^^^^^^^^^^ these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] = note: this error originates in the macro `try` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rustlings` (bin "rustlings") due to 2 previous errors; 6 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: multiple methods are never used [INFO] [stdout] --> src/algorithm5.rs:21:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl Stack { [INFO] [stdout] | ---------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 21 | fn len(&self) -> usize { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 24 | fn clear(&mut self) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 37 | fn peek(&self) -> Option<&T> { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 43 | fn peek_mut(&mut self) -> Option<&mut T> { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 49 | fn into_iter(self) -> IntoIter { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 52 | fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 59 | fn iter_mut(&mut self) -> IterMut { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `IntoIter` is never constructed [INFO] [stdout] --> src/algorithm5.rs:67:8 [INFO] [stdout] | [INFO] [stdout] 67 | struct IntoIter(Stack); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Iter` is never constructed [INFO] [stdout] --> src/algorithm5.rs:79:8 [INFO] [stdout] | [INFO] [stdout] 79 | struct Iter<'a, T: 'a> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `IterMut` is never constructed [INFO] [stdout] --> src/algorithm5.rs:88:8 [INFO] [stdout] | [INFO] [stdout] 88 | struct IterMut<'a, T: 'a> { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/exercise.rs:29:10 [INFO] [stdout] | [INFO] [stdout] 29 | #[derive(Deserialize, Copy, Clone, Debug)] [INFO] [stdout] | ^^^^^^^^^^^ these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] = note: requested on the command line with `-D tail-expr-drop-order` [INFO] [stdout] = note: this error originates in the macro `try` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rustlings` (bin "rustlings" test) due to 2 previous errors; 4 warnings emitted [INFO] running `Command { std: "docker" "inspect" "7d355ef2bfec565401e30ffa0fa2bc9a8d689899960e3eea3639fa2981c2a3a9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7d355ef2bfec565401e30ffa0fa2bc9a8d689899960e3eea3639fa2981c2a3a9", kill_on_drop: false }` [INFO] [stdout] 7d355ef2bfec565401e30ffa0fa2bc9a8d689899960e3eea3639fa2981c2a3a9