[INFO] fetching crate grep_cdylib 0.1.3... [INFO] checking grep_cdylib-0.1.3 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] extracting crate grep_cdylib 0.1.3 into /workspace/builds/worker-7-tc2/source [INFO] validating manifest of crates.io crate grep_cdylib 0.1.3 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 grep_cdylib 0.1.3 [INFO] finished tweaking crates.io crate grep_cdylib 0.1.3 [INFO] tweaked toml for crates.io crate grep_cdylib 0.1.3 written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] crate crates.io crate grep_cdylib 0.1.3 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] 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] 22d55907e2387742c882e55987c88996babb3c874e1e9fc57f62cd80ed5ba206 [INFO] running `Command { std: "docker" "start" "-a" "22d55907e2387742c882e55987c88996babb3c874e1e9fc57f62cd80ed5ba206", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "22d55907e2387742c882e55987c88996babb3c874e1e9fc57f62cd80ed5ba206", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "22d55907e2387742c882e55987c88996babb3c874e1e9fc57f62cd80ed5ba206", kill_on_drop: false }` [INFO] [stdout] 22d55907e2387742c882e55987c88996babb3c874e1e9fc57f62cd80ed5ba206 [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] df64c7ce13a27b2ede4209bd520fe48456e24a490dc537620c8e58c3cd3ca7e8 [INFO] running `Command { std: "docker" "start" "-a" "df64c7ce13a27b2ede4209bd520fe48456e24a490dc537620c8e58c3cd3ca7e8", kill_on_drop: false }` [INFO] [stderr] Compiling anyhow v1.0.55 [INFO] [stderr] Checking libloading v0.7.3 [INFO] [stderr] Checking grep_cdylib v0.1.3 (/opt/rustwide/workdir) [INFO] [stdout] warning: found module declaration for lib.rs [INFO] [stdout] --> examples/grep_extern/main.rs:57:1 [INFO] [stdout] | [INFO] [stdout] 57 | mod lib; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: lib.rs is the root of this crate's library target [INFO] [stdout] = help: to refer to it from other targets, use the library's name as the path [INFO] [stdout] = note: `#[warn(special_module_name)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Ok`, `BufferTooSmall`, and `End` are never constructed [INFO] [stdout] --> examples/grep_extern/interface.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 9 | pub enum GetStrResult { [INFO] [stdout] | ------------ variants in this enum [INFO] [stdout] 10 | Ok, [INFO] [stdout] | ^^ [INFO] [stdout] 11 | BufferTooSmall, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] 12 | End, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `lib` is never read [INFO] [stdout] --> examples/grep_extern/lib.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 6 | pub struct Lib { [INFO] [stdout] | --- field in this struct [INFO] [stdout] 7 | pub lib: Arc, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Lib` has a derived impl for the trait `Clone`, 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] --> examples/grep_extern/main.rs:32:12 [INFO] [stdout] | [INFO] [stdout] 28 | let lib = unsafe { [INFO] [stdout] | --- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 29 | let lib = libloading::Library::new(lib_path())?; [INFO] [stdout] | --- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 32 | Ok(Self { lib }) [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] | these values have significant drop implementation and will observe changes in drop order under Edition 2024 [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: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021 [INFO] [stdout] --> examples/grep_extern/lib.rs:22:12 [INFO] [stdout] | [INFO] [stdout] 12 | pub unsafe fn new(lib: Library) -> Result { [INFO] [stdout] | ------------ these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 22 | Ok(Self { [INFO] [stdout] | ____________^ [INFO] [stdout] 23 | | lib: Arc::new(lib), [INFO] [stdout] 24 | | functions, [INFO] [stdout] 25 | | }) [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] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `grep_cdylib` (example "grep_extern") due to 3 previous errors; 3 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "df64c7ce13a27b2ede4209bd520fe48456e24a490dc537620c8e58c3cd3ca7e8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "df64c7ce13a27b2ede4209bd520fe48456e24a490dc537620c8e58c3cd3ca7e8", kill_on_drop: false }` [INFO] [stdout] df64c7ce13a27b2ede4209bd520fe48456e24a490dc537620c8e58c3cd3ca7e8