[INFO] fetching crate simple-message-channels 0.2.0... [INFO] checking simple-message-channels-0.2.0 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] extracting crate simple-message-channels 0.2.0 into /workspace/builds/worker-7-tc2/source [INFO] validating manifest of crates.io crate simple-message-channels 0.2.0 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 simple-message-channels 0.2.0 [INFO] finished tweaking crates.io crate simple-message-channels 0.2.0 [INFO] tweaked toml for crates.io crate simple-message-channels 0.2.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] crate crates.io crate simple-message-channels 0.2.0 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] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 46c08b5cee72d020fe94a3bed879d293b39ed370bb2b4ec8a4dea8311ab6fce7 [INFO] running `Command { std: "docker" "start" "-a" "46c08b5cee72d020fe94a3bed879d293b39ed370bb2b4ec8a4dea8311ab6fce7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "46c08b5cee72d020fe94a3bed879d293b39ed370bb2b4ec8a4dea8311ab6fce7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "46c08b5cee72d020fe94a3bed879d293b39ed370bb2b4ec8a4dea8311ab6fce7", kill_on_drop: false }` [INFO] [stdout] 46c08b5cee72d020fe94a3bed879d293b39ed370bb2b4ec8a4dea8311ab6fce7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 8f5443ad4efaf9db696b479d3379134d4f93db5622f5dcf8265fd8f4cb97147e [INFO] running `Command { std: "docker" "start" "-a" "8f5443ad4efaf9db696b479d3379134d4f93db5622f5dcf8265fd8f4cb97147e", kill_on_drop: false }` [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling libc v0.2.65 [INFO] [stderr] Compiling proc-macro2 v1.0.6 [INFO] [stderr] Compiling autocfg v0.1.7 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Compiling unicode-xid v0.2.0 [INFO] [stderr] Checking pin-utils v0.1.0-alpha.4 [INFO] [stderr] Compiling syn v1.0.8 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Compiling memchr v2.2.1 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Checking futures-core v0.3.1 [INFO] [stderr] Compiling proc-macro-nested v0.1.3 [INFO] [stderr] Checking futures-io v0.3.1 [INFO] [stderr] Checking futures-core-preview v0.3.0-alpha.19 [INFO] [stderr] Checking futures-sink-preview v0.3.0-alpha.19 [INFO] [stderr] Checking futures-sink v0.3.1 [INFO] [stderr] Checking lock_api v0.3.2 [INFO] [stderr] Checking futures-task v0.3.1 [INFO] [stderr] Checking crossbeam-utils v0.6.6 [INFO] [stderr] Checking async-macros v2.0.0 [INFO] [stderr] Checking futures-timer v2.0.2 [INFO] [stderr] Checking futures-util-preview v0.3.0-alpha.19 [INFO] [stderr] Checking futures-channel v0.3.1 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Checking futures-channel-preview v0.3.0-alpha.19 [INFO] [stderr] Compiling crossbeam-utils v0.7.0 [INFO] [stderr] Compiling crossbeam-epoch v0.8.0 [INFO] [stderr] Checking once_cell v1.2.0 [INFO] [stderr] Checking pin-project-lite v0.1.1 [INFO] [stderr] Checking varinteger v1.0.6 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Checking async-task v1.0.0 [INFO] [stderr] Checking kv-log-macro v1.0.4 [INFO] [stderr] Checking smallvec v0.6.13 [INFO] [stderr] Compiling parking_lot_core v0.6.2 [INFO] [stderr] Compiling memoffset v0.5.3 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Checking crossbeam-channel v0.4.0 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Checking crossbeam-deque v0.7.2 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking num_cpus v1.11.1 [INFO] [stderr] Checking mio v0.6.20 [INFO] [stderr] Checking broadcaster v0.2.6 [INFO] [stderr] Checking mio-uds v0.6.7 [INFO] [stderr] Checking async-std v1.1.0 [INFO] [stderr] Compiling proc-macro-hack v0.5.11 [INFO] [stderr] Compiling futures-macro v0.3.1 [INFO] [stderr] Checking futures-util v0.3.1 [INFO] [stderr] Checking futures-executor v0.3.1 [INFO] [stderr] Checking futures v0.3.1 [INFO] [stderr] Checking simple-message-channels v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/message.rs:80:5 [INFO] [stdout] | [INFO] [stdout] 80 | &mut buf[end..].copy_from_slice(&msg.message); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 80 | let _ = &mut buf[end..].copy_from_slice(&msg.message); [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/reader.rs:38:21 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn new(reader: R) -> Self { [INFO] [stdout] | --------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 37 | Self { [INFO] [stdout] 38 | future: decoder(reader).boxed(), [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: unused borrow that must be used [INFO] [stdout] --> src/message.rs:80:5 [INFO] [stdout] | [INFO] [stdout] 80 | &mut buf[end..].copy_from_slice(&msg.message); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 80 | let _ = &mut buf[end..].copy_from_slice(&msg.message); [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/reader.rs:38:21 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn new(reader: R) -> Self { [INFO] [stdout] | --------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 37 | Self { [INFO] [stdout] 38 | future: decoder(reader).boxed(), [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: aborting due to 1 previous error; 1 warning emitted [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 `simple-message-channels` (lib test) due to 2 previous errors; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `simple-message-channels` (lib) due to 2 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "8f5443ad4efaf9db696b479d3379134d4f93db5622f5dcf8265fd8f4cb97147e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8f5443ad4efaf9db696b479d3379134d4f93db5622f5dcf8265fd8f4cb97147e", kill_on_drop: false }` [INFO] [stdout] 8f5443ad4efaf9db696b479d3379134d4f93db5622f5dcf8265fd8f4cb97147e