[INFO] fetching crate mcp23x17 0.2.0... [INFO] checking mcp23x17-0.2.0 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] extracting crate mcp23x17 0.2.0 into /workspace/builds/worker-7-tc2/source [INFO] validating manifest of crates.io crate mcp23x17 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 mcp23x17 0.2.0 [INFO] finished tweaking crates.io crate mcp23x17 0.2.0 [INFO] tweaked toml for crates.io crate mcp23x17 0.2.0 written to /workspace/builds/worker-7-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 25 packages to latest compatible versions [INFO] [stderr] Adding bitflags v0.3.3 (latest: v2.6.0) [INFO] [stderr] Adding bitflags v0.4.0 (latest: v2.6.0) [INFO] [stderr] Adding bitflags v1.3.2 (latest: v2.6.0) [INFO] [stderr] Adding cast v0.2.7 (latest: v0.3.0) [INFO] [stderr] Adding cfg-if v0.1.10 (latest: v1.0.0) [INFO] [stderr] Adding embedded-hal v0.2.7 (latest: v1.0.0) [INFO] [stderr] Adding embedded-hal-mock v0.2.0 (latest: v0.11.1) [INFO] [stderr] Adding i2cdev v0.4.4 (latest: v0.6.1) [INFO] [stderr] Adding linux-embedded-hal v0.2.2 (latest: v0.4.0) [INFO] [stderr] Adding nb v0.1.3 (latest: v1.1.0) [INFO] [stderr] Adding nix v0.6.0 (latest: v0.29.0) [INFO] [stderr] Adding nix v0.14.1 (latest: v0.29.0) [INFO] [stderr] Adding rustc_version v0.1.7 (latest: v0.4.1) [INFO] [stderr] Adding semver v0.1.20 (latest: v1.0.23) [INFO] [stderr] Adding spidev v0.3.0 (latest: v0.6.0) [INFO] [stderr] Adding sysfs_gpio v0.5.4 (latest: v0.6.2) [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] [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-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] e5e9025d766facd23d415ac034118cfe3e4cc9e6f34e6e19e589186a912eb846 [INFO] running `Command { std: "docker" "start" "-a" "e5e9025d766facd23d415ac034118cfe3e4cc9e6f34e6e19e589186a912eb846", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e5e9025d766facd23d415ac034118cfe3e4cc9e6f34e6e19e589186a912eb846", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e5e9025d766facd23d415ac034118cfe3e4cc9e6f34e6e19e589186a912eb846", kill_on_drop: false }` [INFO] [stdout] e5e9025d766facd23d415ac034118cfe3e4cc9e6f34e6e19e589186a912eb846 [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] 9a76a8374207ae87ac587231a7a43002539051a052e66951b6b456de35f19663 [INFO] running `Command { std: "docker" "start" "-a" "9a76a8374207ae87ac587231a7a43002539051a052e66951b6b456de35f19663", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Compiling semver v0.1.20 [INFO] [stderr] Compiling nix v0.14.1 [INFO] [stderr] Checking nb v0.1.3 [INFO] [stderr] Checking bitflags v0.4.0 [INFO] [stderr] Checking bitflags v0.3.3 [INFO] [stderr] Compiling cast v0.2.7 [INFO] [stderr] Checking embedded-hal v0.2.7 [INFO] [stderr] Checking embedded-hal-mock v0.2.0 [INFO] [stderr] Checking mcp23x17 v0.2.0 (/opt/rustwide/workdir) [INFO] [stderr] Compiling rustc_version v0.1.7 [INFO] [stdout] warning: associated constant `_nothin` should have an upper case name [INFO] [stdout] --> src/lib.rs:101:15 [INFO] [stdout] | [INFO] [stdout] 101 | const _nothin = 1 << 0; [INFO] [stdout] | ^^^^^^^ help: convert the identifier to upper case: `_NOTHIN` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_upper_case_globals)]` on by default [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:117:12 [INFO] [stdout] | [INFO] [stdout] 116 | pub fn new(i2c: I2C) -> Result { [INFO] [stdout] | -------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] 117 | Ok(Self { [INFO] [stdout] | ____________^ [INFO] [stdout] 118 | | i2c, [INFO] [stdout] 119 | | active_port: Port::A, [INFO] [stdout] 120 | | }) [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; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `mcp23x17` (lib) due to 2 previous errors; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "9a76a8374207ae87ac587231a7a43002539051a052e66951b6b456de35f19663", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9a76a8374207ae87ac587231a7a43002539051a052e66951b6b456de35f19663", kill_on_drop: false }` [INFO] [stdout] 9a76a8374207ae87ac587231a7a43002539051a052e66951b6b456de35f19663