[INFO] fetching crate smallvec 2.0.0-alpha.7...
[INFO] checking smallvec-2.0.0-alpha.7 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] extracting crate smallvec 2.0.0-alpha.7 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate smallvec 2.0.0-alpha.7 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 smallvec 2.0.0-alpha.7
[INFO] finished tweaking crates.io crate smallvec 2.0.0-alpha.7
[INFO] tweaked toml for crates.io crate smallvec 2.0.0-alpha.7 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 31eeb8ed2c99e8169a246fbcdefd8a3fbe4bcdaf0fba9442a7c6553027d9b169
[INFO] running `Command { std: "docker" "start" "-a" "31eeb8ed2c99e8169a246fbcdefd8a3fbe4bcdaf0fba9442a7c6553027d9b169", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31eeb8ed2c99e8169a246fbcdefd8a3fbe4bcdaf0fba9442a7c6553027d9b169", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31eeb8ed2c99e8169a246fbcdefd8a3fbe4bcdaf0fba9442a7c6553027d9b169", kill_on_drop: false }`
[INFO] [stdout] 31eeb8ed2c99e8169a246fbcdefd8a3fbe4bcdaf0fba9442a7c6553027d9b169
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] bafaf49624a91de306132b87186d223ba02f06c0978bf982ae92461d14bd121c
[INFO] running `Command { std: "docker" "start" "-a" "bafaf49624a91de306132b87186d223ba02f06c0978bf982ae92461d14bd121c", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]     Checking smallvec v2.0.0-alpha.7 (/opt/rustwide/workdir)
[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/lib.rs:1321:9
[INFO] [stdout]      |
[INFO] [stdout] 1320 |     pub fn into_boxed_slice(self) -> Box<[T]> {
[INFO] [stdout]      |                             ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 1321 |         self.into_vec().into_boxed_slice()
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this changes meaning in Rust 2024
[INFO] [stdout]      = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/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/lib.rs:1378:30
[INFO] [stdout]      |
[INFO] [stdout] 1378 |         self.dedup_by(|a, b| key(a) == key(b));
[INFO] [stdout]      |                              ^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this changes meaning in Rust 2024
[INFO] [stdout]      = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[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/lib.rs:1378:40
[INFO] [stdout]      |
[INFO] [stdout] 1378 |         self.dedup_by(|a, b| key(a) == key(b));
[INFO] [stdout]      |                                        ^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this changes meaning in Rust 2024
[INFO] [stdout]      = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smallvec` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "bafaf49624a91de306132b87186d223ba02f06c0978bf982ae92461d14bd121c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bafaf49624a91de306132b87186d223ba02f06c0978bf982ae92461d14bd121c", kill_on_drop: false }`
[INFO] [stdout] bafaf49624a91de306132b87186d223ba02f06c0978bf982ae92461d14bd121c