[INFO] fetching crate serde_bencode 0.2.4... [INFO] checking serde_bencode-0.2.4 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864 [INFO] extracting crate serde_bencode 0.2.4 into /workspace/builds/worker-1-tc2/source [INFO] validating manifest of crates.io crate serde_bencode 0.2.4 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] removed /workspace/builds/worker-1-tc2/source/.cargo/config.toml [INFO] started tweaking crates.io crate serde_bencode 0.2.4 [INFO] finished tweaking crates.io crate serde_bencode 0.2.4 [INFO] tweaked toml for crates.io crate serde_bencode 0.2.4 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] crate crates.io crate serde_bencode 0.2.4 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a6ed9d83453dc0f4786e895623c9a45c5dcc5f6d174b4dbb833dbe2baf533849 [INFO] running `Command { std: "docker" "start" "-a" "a6ed9d83453dc0f4786e895623c9a45c5dcc5f6d174b4dbb833dbe2baf533849", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a6ed9d83453dc0f4786e895623c9a45c5dcc5f6d174b4dbb833dbe2baf533849", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a6ed9d83453dc0f4786e895623c9a45c5dcc5f6d174b4dbb833dbe2baf533849", kill_on_drop: false }` [INFO] [stdout] a6ed9d83453dc0f4786e895623c9a45c5dcc5f6d174b4dbb833dbe2baf533849 [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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f0ffc213ceac075c22c35aabae81fcc03cd540d09ab8e6b99be2b55674e34e11 [INFO] running `Command { std: "docker" "start" "-a" "f0ffc213ceac075c22c35aabae81fcc03cd540d09ab8e6b99be2b55674e34e11", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.69 [INFO] [stderr] Compiling serde v1.0.188 [INFO] [stderr] Compiling quote v1.0.33 [INFO] [stderr] Compiling syn v2.0.38 [INFO] [stderr] Checking serde_bytes v0.11.12 [INFO] [stderr] Checking serde_test v1.0.176 [INFO] [stderr] Compiling serde_derive v1.0.188 [INFO] [stderr] Checking serde_bencode v0.2.4 (/opt/rustwide/workdir) [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/ser.rs:95:69 [INFO] [stdout] | [INFO] [stdout] 94 | impl<'a> SerializeMap<'a> { [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] 95 | pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'_> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(elided_named_lifetimes)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/ser.rs:95:69 [INFO] [stdout] | [INFO] [stdout] 94 | impl<'a> SerializeMap<'a> { [INFO] [stdout] | -- lifetime `'a` declared here [INFO] [stdout] 95 | pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'_> { [INFO] [stdout] | ^^ this elided lifetime gets resolved as `'a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(elided_named_lifetimes)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this value of type `Result` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> examples/parse_torrent.rs:97:11 [INFO] [stdout] | [INFO] [stdout] 96 | let mut handle = stdin.lock(); [INFO] [stdout] | ---------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] 97 | match handle.read_to_end(&mut buffer) { [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] warning: fields `0` and `1` are never read [INFO] [stdout] --> examples/parse_torrent.rs:9:13 [INFO] [stdout] | [INFO] [stdout] 9 | struct Node(String, i64); [INFO] [stdout] | ---- ^^^^^^ ^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing these fields [INFO] [stdout] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `serde_bencode` (example "parse_torrent") due to 2 previous errors; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "f0ffc213ceac075c22c35aabae81fcc03cd540d09ab8e6b99be2b55674e34e11", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f0ffc213ceac075c22c35aabae81fcc03cd540d09ab8e6b99be2b55674e34e11", kill_on_drop: false }` [INFO] [stdout] f0ffc213ceac075c22c35aabae81fcc03cd540d09ab8e6b99be2b55674e34e11