[INFO] fetching crate preftool-derive-core 0.2.0... [INFO] checking preftool-derive-core-0.2.0 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] extracting crate preftool-derive-core 0.2.0 into /workspace/builds/worker-2-tc2/source [INFO] validating manifest of crates.io crate preftool-derive-core 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 preftool-derive-core 0.2.0 [INFO] finished tweaking crates.io crate preftool-derive-core 0.2.0 [INFO] tweaked toml for crates.io crate preftool-derive-core 0.2.0 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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 18 packages to latest compatible versions [INFO] [stderr] Adding darling v0.9.0 (latest: v0.20.10) [INFO] [stderr] Adding darling_core v0.9.0 (latest: v0.20.10) [INFO] [stderr] Adding darling_macro v0.9.0 (latest: v0.20.10) [INFO] [stderr] Adding proc-macro2 v0.4.30 (latest: v1.0.86) [INFO] [stderr] Adding quote v0.6.13 (latest: v1.0.37) [INFO] [stderr] Adding strsim v0.7.0 (latest: v0.11.1) [INFO] [stderr] Adding syn v0.15.44 (latest: v2.0.77) [INFO] [stderr] Adding unicode-xid v0.1.0 (latest: v0.2.5) [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] 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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6d17798d3b686aa50acf5fa3e377ce037601a68af4bf3955c025401ad064a489 [INFO] running `Command { std: "docker" "start" "-a" "6d17798d3b686aa50acf5fa3e377ce037601a68af4bf3955c025401ad064a489", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6d17798d3b686aa50acf5fa3e377ce037601a68af4bf3955c025401ad064a489", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6d17798d3b686aa50acf5fa3e377ce037601a68af4bf3955c025401ad064a489", kill_on_drop: false }` [INFO] [stdout] 6d17798d3b686aa50acf5fa3e377ce037601a68af4bf3955c025401ad064a489 [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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ba373e91861ec90c5f0303f9aacf46a1ee15a790fbfd391a4b55024c12a12b8a [INFO] running `Command { std: "docker" "start" "-a" "ba373e91861ec90c5f0303f9aacf46a1ee15a790fbfd391a4b55024c12a12b8a", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling strsim v0.7.0 [INFO] [stderr] Checking ident_case v1.0.1 [INFO] [stderr] Checking Inflector v0.11.4 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking darling_core v0.9.0 [INFO] [stderr] Compiling darling_macro v0.9.0 [INFO] [stderr] Checking darling v0.9.0 [INFO] [stderr] Checking preftool-derive-core v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `attrs` is never read [INFO] [stdout] --> src/lib.rs:73:3 [INFO] [stdout] | [INFO] [stdout] 59 | struct FieldOptions { [INFO] [stdout] | ------------ field in this struct [INFO] [stdout] ... [INFO] [stdout] 73 | attrs: Vec, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `FieldOptions` 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] warning: fields `ident` and `fields` are never read [INFO] [stdout] --> src/lib.rs:107:3 [INFO] [stdout] | [INFO] [stdout] 106 | struct VariantOptions { [INFO] [stdout] | -------------- fields in this struct [INFO] [stdout] 107 | ident: syn::Ident, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 108 | fields: darling::ast::Fields, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `VariantOptions` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [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:49:8 [INFO] [stdout] | [INFO] [stdout] 48 | let val = > as FromMeta>::from_meta(item)?; [INFO] [stdout] | --- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 49 | Ok(match val { [INFO] [stdout] | ________^ [INFO] [stdout] 50 | | None => Validation::None, [INFO] [stdout] 51 | | Some(Override::Inherit) => Validation::DefaultTrait, [INFO] [stdout] 52 | | Some(Override::Explicit(path)) => Validation::Custom(path), [INFO] [stdout] 53 | | }) [INFO] [stdout] | | ^ these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | |_____| [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; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `attrs` is never read [INFO] [stdout] --> src/lib.rs:73:3 [INFO] [stdout] | [INFO] [stdout] 59 | struct FieldOptions { [INFO] [stdout] | ------------ field in this struct [INFO] [stdout] ... [INFO] [stdout] 73 | attrs: Vec, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `FieldOptions` 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] warning: fields `ident` and `fields` are never read [INFO] [stdout] --> src/lib.rs:107:3 [INFO] [stdout] | [INFO] [stdout] 106 | struct VariantOptions { [INFO] [stdout] | -------------- fields in this struct [INFO] [stdout] 107 | ident: syn::Ident, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 108 | fields: darling::ast::Fields, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `VariantOptions` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [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:49:8 [INFO] [stdout] | [INFO] [stdout] 48 | let val = > as FromMeta>::from_meta(item)?; [INFO] [stdout] | --- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 49 | Ok(match val { [INFO] [stdout] | ________^ [INFO] [stdout] 50 | | None => Validation::None, [INFO] [stdout] 51 | | Some(Override::Inherit) => Validation::DefaultTrait, [INFO] [stdout] 52 | | Some(Override::Explicit(path)) => Validation::Custom(path), [INFO] [stdout] 53 | | }) [INFO] [stdout] | | ^ these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | |_____| [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] [stderr] error: could not compile `preftool-derive-core` (lib test) due to 2 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `preftool-derive-core` (lib) due to 2 previous errors; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "ba373e91861ec90c5f0303f9aacf46a1ee15a790fbfd391a4b55024c12a12b8a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ba373e91861ec90c5f0303f9aacf46a1ee15a790fbfd391a4b55024c12a12b8a", kill_on_drop: false }` [INFO] [stdout] ba373e91861ec90c5f0303f9aacf46a1ee15a790fbfd391a4b55024c12a12b8a