[INFO] fetching crate disjoint-sets 0.4.2... [INFO] checking disjoint-sets-0.4.2 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate disjoint-sets 0.4.2 into /workspace/builds/worker-1-tc2/source [INFO] validating manifest of crates.io crate disjoint-sets 0.4.2 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate disjoint-sets 0.4.2 [INFO] finished tweaking crates.io crate disjoint-sets 0.4.2 [INFO] tweaked toml for crates.io crate disjoint-sets 0.4.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 10 packages to latest compatible versions [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4fc4936bd2629da142a66e86c9706dd206fb7c441d0c62222566aa8ba87fa8f0 [INFO] running `Command { std: "docker" "start" "-a" "4fc4936bd2629da142a66e86c9706dd206fb7c441d0c62222566aa8ba87fa8f0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4fc4936bd2629da142a66e86c9706dd206fb7c441d0c62222566aa8ba87fa8f0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4fc4936bd2629da142a66e86c9706dd206fb7c441d0c62222566aa8ba87fa8f0", kill_on_drop: false }` [INFO] [stdout] 4fc4936bd2629da142a66e86c9706dd206fb7c441d0c62222566aa8ba87fa8f0 [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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 277666afaf5ade3933aee17d0ae9941905a288889e3e1df294fc03c2db02065d [INFO] running `Command { std: "docker" "start" "-a" "277666afaf5ade3933aee17d0ae9941905a288889e3e1df294fc03c2db02065d", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [INFO] [stderr] Compiling serde v1.0.210 [INFO] [stderr] Checking disjoint-sets v0.4.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead [INFO] [stdout] --> src/async.rs:173:28 [INFO] [stdout] | [INFO] [stdout] 173 | self.0[element].id.compare_and_swap(old_parent, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this value of type `RefMut<'_, NodeImpl>` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/tree.rs:427:16 [INFO] [stdout] | [INFO] [stdout] 424 | fn root_with_data(&self, f: F) -> R [INFO] [stdout] | - these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 427 | match *self.0.borrow_mut() { [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: this value of type `(NodeImpl, NodeImpl)` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/tree.rs:461:15 [INFO] [stdout] | [INFO] [stdout] 452 | fn set_parent_with(&self, parent: &Self, f: F) [INFO] [stdout] | - these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] 453 | where F: FnOnce(Data, Data) -> Data { [INFO] [stdout] 454 | let mut guard_self = self.0.borrow_mut(); [INFO] [stdout] | -------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] 455 | let mut guard_parent = parent.0.borrow_mut(); [INFO] [stdout] | ---------------- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 461 | match (contents_self, contents_parent) { [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] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/tree.rs:465:17 [INFO] [stdout] | [INFO] [stdout] 465 | / mem::replace(&mut *guard_parent, Root { [INFO] [stdout] 466 | | data: new_data, [INFO] [stdout] 467 | | rank: rank, [INFO] [stdout] 468 | | }); [INFO] [stdout] | |__________________^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 465 | let _ = mem::replace(&mut *guard_parent, Root { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `disjoint-sets` (lib) due to 3 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "277666afaf5ade3933aee17d0ae9941905a288889e3e1df294fc03c2db02065d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "277666afaf5ade3933aee17d0ae9941905a288889e3e1df294fc03c2db02065d", kill_on_drop: false }` [INFO] [stdout] 277666afaf5ade3933aee17d0ae9941905a288889e3e1df294fc03c2db02065d