[INFO] fetching crate regalloc 0.0.34... [INFO] checking regalloc-0.0.34 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate regalloc 0.0.34 into /workspace/builds/worker-2-tc2/source [INFO] validating manifest of crates.io crate regalloc 0.0.34 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 regalloc 0.0.34 [INFO] finished tweaking crates.io crate regalloc 0.0.34 [INFO] tweaked toml for crates.io crate regalloc 0.0.34 written to /workspace/builds/worker-2-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] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Locking 9 packages to latest compatible versions [INFO] [stderr] Adding rustc-hash v1.1.0 (available: v2.0.0) [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] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 42eaa1dd7038dadec45e9677679f255cd0f3b5aa190aa84ba8c6f2a6893f17f7 [INFO] running `Command { std: "docker" "start" "-a" "42eaa1dd7038dadec45e9677679f255cd0f3b5aa190aa84ba8c6f2a6893f17f7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "42eaa1dd7038dadec45e9677679f255cd0f3b5aa190aa84ba8c6f2a6893f17f7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "42eaa1dd7038dadec45e9677679f255cd0f3b5aa190aa84ba8c6f2a6893f17f7", kill_on_drop: false }` [INFO] [stdout] 42eaa1dd7038dadec45e9677679f255cd0f3b5aa190aa84ba8c6f2a6893f17f7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6c4c034bdf6ec9d54d69bb363185a90134c7c31af083f68fa41014ea7237027d [INFO] running `Command { std: "docker" "start" "-a" "6c4c034bdf6ec9d54d69bb363185a90134c7c31af083f68fa41014ea7237027d", kill_on_drop: false }` [INFO] [stderr] Checking rustc-hash v1.1.0 [INFO] [stderr] Checking regalloc v0.0.34 (/opt/rustwide/workdir) [INFO] [stdout] warning: elided lifetime has a name [INFO] [stdout] --> src/linear_scan/assign_registers.rs:285:49 [INFO] [stdout] | [INFO] [stdout] 285 | fn iter<'a>(&'a self) -> RegisterMappingIter { [INFO] [stdout] | -- lifetime `'a` declared here ^ 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: elided lifetime has a name [INFO] [stdout] --> src/linear_scan/assign_registers.rs:285:49 [INFO] [stdout] | [INFO] [stdout] 285 | fn iter<'a>(&'a self) -> RegisterMappingIter { [INFO] [stdout] | -- lifetime `'a` declared here ^ 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 `T` has significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> src/avl_tree.rs:950:25 [INFO] [stdout] | [INFO] [stdout] 936 | pub fn contains(&self, item: T, mb_cmp: Option<&F>) -> bool [INFO] [stdout] | ---- these local bindings with significant drop implementation may observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 950 | let cmp_arg_left: T = item.clone(); [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: variable does not need to be mutable [INFO] [stdout] --> src/linear_scan/resolve_moves.rs:679:33 [INFO] [stdout] | [INFO] [stdout] 679 | if let Some(mut cycled) = find_cycled_move(stack, &mut stack_cur, blocking) { [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/linear_scan/resolve_moves.rs:679:33 [INFO] [stdout] | [INFO] [stdout] 679 | if let Some(mut cycled) = find_cycled_move(stack, &mut stack_cur, blocking) { [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | Spill { vreg: Option }, [INFO] [stdout] | ----- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:21:14 [INFO] [stdout] | [INFO] [stdout] 21 | Reload { vreg: Option }, [INFO] [stdout] | ------ ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:22:12 [INFO] [stdout] | [INFO] [stdout] 22 | Move { vreg: VirtualReg }, [INFO] [stdout] | ---- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | Spill { vreg: Option }, [INFO] [stdout] | ----- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:21:14 [INFO] [stdout] | [INFO] [stdout] 21 | Reload { vreg: Option }, [INFO] [stdout] | ------ ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:22:12 [INFO] [stdout] | [INFO] [stdout] 22 | Move { vreg: VirtualReg }, [INFO] [stdout] | ---- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error; 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `regalloc` (lib test) due to 2 previous errors; 5 warnings emitted [INFO] running `Command { std: "docker" "inspect" "6c4c034bdf6ec9d54d69bb363185a90134c7c31af083f68fa41014ea7237027d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6c4c034bdf6ec9d54d69bb363185a90134c7c31af083f68fa41014ea7237027d", kill_on_drop: false }` [INFO] [stdout] 6c4c034bdf6ec9d54d69bb363185a90134c7c31af083f68fa41014ea7237027d