[INFO] fetching crate gdb_probe 0.1.2... [INFO] checking gdb_probe-0.1.2 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] extracting crate gdb_probe 0.1.2 into /workspace/builds/worker-1-tc2/source [INFO] validating manifest of crates.io crate gdb_probe 0.1.2 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 gdb_probe 0.1.2 [INFO] finished tweaking crates.io crate gdb_probe 0.1.2 [INFO] tweaked toml for crates.io crate gdb_probe 0.1.2 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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 8 packages to latest compatible versions [INFO] [stderr] Adding bitflags v1.3.2 (latest: v2.6.0) [INFO] [stderr] Adding cfg-if v0.1.10 (latest: v1.0.0) [INFO] [stderr] Adding nix v0.13.1 (latest: v0.29.0) [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-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3adeef77e77d567846be6a9aeb81ec21437b45bba6b23c3e4b9c3a1a9a1f0708 [INFO] running `Command { std: "docker" "start" "-a" "3adeef77e77d567846be6a9aeb81ec21437b45bba6b23c3e4b9c3a1a9a1f0708", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3adeef77e77d567846be6a9aeb81ec21437b45bba6b23c3e4b9c3a1a9a1f0708", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3adeef77e77d567846be6a9aeb81ec21437b45bba6b23c3e4b9c3a1a9a1f0708", kill_on_drop: false }` [INFO] [stdout] 3adeef77e77d567846be6a9aeb81ec21437b45bba6b23c3e4b9c3a1a9a1f0708 [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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0c0a0d96ee86ce2738e4bf6dce65e8fd3379ef9b074e26a30f0c79e819c3d75a [INFO] running `Command { std: "docker" "start" "-a" "0c0a0d96ee86ce2738e4bf6dce65e8fd3379ef9b074e26a30f0c79e819c3d75a", kill_on_drop: false }` [INFO] [stderr] Compiling nix v0.13.1 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Checking gdb_probe v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `child` [INFO] [stdout] --> src/lib.rs:9:32 [INFO] [stdout] | [INFO] [stdout] 9 | Ok(ForkResult::Parent { child, .. }) => { [INFO] [stdout] | ^^^^^ help: try ignoring the field: `child: _` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/lib.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | kill(getpid(), Signal::SIGSTOP ); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 11 | let _ = kill(getpid(), Signal::SIGSTOP ); [INFO] [stdout] | +++++++ [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:17:45 [INFO] [stdout] | [INFO] [stdout] 17 | let argv_c = argv.iter().map(|s| CString::new(*s).unwrap()).collect::>(); [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] [stderr] error: could not compile `gdb_probe` (lib) due to 2 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: unused variable: `child` [INFO] [stdout] --> src/lib.rs:9:32 [INFO] [stdout] | [INFO] [stdout] 9 | Ok(ForkResult::Parent { child, .. }) => { [INFO] [stdout] | ^^^^^ help: try ignoring the field: `child: _` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/lib.rs:32:13 [INFO] [stdout] | [INFO] [stdout] 32 | let x = 3+4; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/lib.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | kill(getpid(), Signal::SIGSTOP ); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 11 | let _ = kill(getpid(), Signal::SIGSTOP ); [INFO] [stdout] | +++++++ [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:17:45 [INFO] [stdout] | [INFO] [stdout] 17 | let argv_c = argv.iter().map(|s| CString::new(*s).unwrap()).collect::>(); [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; 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `gdb_probe` (lib test) due to 2 previous errors; 3 warnings emitted [INFO] running `Command { std: "docker" "inspect" "0c0a0d96ee86ce2738e4bf6dce65e8fd3379ef9b074e26a30f0c79e819c3d75a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0c0a0d96ee86ce2738e4bf6dce65e8fd3379ef9b074e26a30f0c79e819c3d75a", kill_on_drop: false }` [INFO] [stdout] 0c0a0d96ee86ce2738e4bf6dce65e8fd3379ef9b074e26a30f0c79e819c3d75a