[INFO] fetching crate mgrep 0.1.0... [INFO] checking mgrep-0.1.0 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] extracting crate mgrep 0.1.0 into /workspace/builds/worker-1-tc2/source [INFO] validating manifest of crates.io crate mgrep 0.1.0 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 crates.io crate mgrep 0.1.0 [INFO] finished tweaking crates.io crate mgrep 0.1.0 [INFO] tweaked toml for crates.io crate mgrep 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] crate crates.io crate mgrep 0.1.0 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a4d4704844f3191766c45669e25a106e81f87582a73bd65797c0f62f172a6789 [INFO] running `Command { std: "docker" "start" "-a" "a4d4704844f3191766c45669e25a106e81f87582a73bd65797c0f62f172a6789", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a4d4704844f3191766c45669e25a106e81f87582a73bd65797c0f62f172a6789", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a4d4704844f3191766c45669e25a106e81f87582a73bd65797c0f62f172a6789", kill_on_drop: false }` [INFO] [stdout] a4d4704844f3191766c45669e25a106e81f87582a73bd65797c0f62f172a6789 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 4e77cca71f263d33c3d8861c11be2bada420cdc58c24010abe90d53b2550621c [INFO] running `Command { std: "docker" "start" "-a" "4e77cca71f263d33c3d8861c11be2bada420cdc58c24010abe90d53b2550621c", kill_on_drop: false }` [INFO] [stderr] Checking mgrep v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: function `generate_workout` is never used [INFO] [stdout] --> src/main.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn generate_workout(intensity: u32, random_number: u32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Cacher` is never constructed [INFO] [stdout] --> src/main.rs:46:8 [INFO] [stdout] | [INFO] [stdout] 46 | struct Cacher [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `value` are never used [INFO] [stdout] --> src/main.rs:60:8 [INFO] [stdout] | [INFO] [stdout] 55 | / impl Cacher [INFO] [stdout] 56 | | where [INFO] [stdout] 57 | | T: Fn(&P) -> R, [INFO] [stdout] 58 | | P: std::cmp::Eq + std::hash::Hash, [INFO] [stdout] | |______________________________________- associated items in this implementation [INFO] [stdout] 59 | { [INFO] [stdout] 60 | fn new(calculation: T) -> Cacher { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 66 | fn value(&mut self, arg: P) -> &R { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Shoe` is never constructed [INFO] [stdout] --> src/main.rs:78:8 [INFO] [stdout] | [INFO] [stdout] 78 | struct Shoe { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `shoes_in_my_size` is never used [INFO] [stdout] --> src/main.rs:83:4 [INFO] [stdout] | [INFO] [stdout] 83 | fn shoes_in_my_size( [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Counter` is never constructed [INFO] [stdout] --> src/main.rs:93:8 [INFO] [stdout] | [INFO] [stdout] 93 | struct Counter { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/main.rs:97:8 [INFO] [stdout] | [INFO] [stdout] 96 | impl Counter { [INFO] [stdout] | ------------ associated function in this implementation [INFO] [stdout] 97 | fn new() -> Counter { [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/main.rs:63:21 [INFO] [stdout] | [INFO] [stdout] 60 | fn new(calculation: T) -> Cacher { [INFO] [stdout] | -------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 63 | values: HashMap::new(), [INFO] [stdout] | ^^^^^^^^^^^^^^ [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] [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/main.rs:68:15 [INFO] [stdout] | [INFO] [stdout] 66 | fn value(&mut self, arg: P) -> &R { [INFO] [stdout] | ------ these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 67 | use std::collections::hash_map::Entry; [INFO] [stdout] 68 | match self.values.entry(arg) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `mgrep` (bin "mgrep") due to 3 previous errors; 7 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: function `generate_workout` is never used [INFO] [stdout] --> src/main.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn generate_workout(intensity: u32, random_number: u32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [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/main.rs:63:21 [INFO] [stdout] | [INFO] [stdout] 60 | fn new(calculation: T) -> Cacher { [INFO] [stdout] | -------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 63 | values: HashMap::new(), [INFO] [stdout] | ^^^^^^^^^^^^^^ [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] [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/main.rs:68:15 [INFO] [stdout] | [INFO] [stdout] 66 | fn value(&mut self, arg: P) -> &R { [INFO] [stdout] | ------ these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 67 | use std::collections::hash_map::Entry; [INFO] [stdout] 68 | match self.values.entry(arg) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this changes meaning in Rust 2024 [INFO] [stdout] = note: for more information, see issue #123739 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `mgrep` (bin "mgrep" test) due to 3 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "4e77cca71f263d33c3d8861c11be2bada420cdc58c24010abe90d53b2550621c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4e77cca71f263d33c3d8861c11be2bada420cdc58c24010abe90d53b2550621c", kill_on_drop: false }` [INFO] [stdout] 4e77cca71f263d33c3d8861c11be2bada420cdc58c24010abe90d53b2550621c