[INFO] fetching crate walle_mqtt_protocol 0.1.14... [INFO] checking walle_mqtt_protocol-0.1.14 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604 [INFO] extracting crate walle_mqtt_protocol 0.1.14 into /workspace/builds/worker-4-tc2/source [INFO] validating manifest of crates.io crate walle_mqtt_protocol 0.1.14 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 walle_mqtt_protocol 0.1.14 [INFO] finished tweaking crates.io crate walle_mqtt_protocol 0.1.14 [INFO] tweaked toml for crates.io crate walle_mqtt_protocol 0.1.14 written to /workspace/builds/worker-4-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 16 packages to latest compatible versions [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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] d69308f7aa85b3bf32171803d75fc53bca8a187600fefa08c66f9839a0696273 [INFO] running `Command { std: "docker" "start" "-a" "d69308f7aa85b3bf32171803d75fc53bca8a187600fefa08c66f9839a0696273", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d69308f7aa85b3bf32171803d75fc53bca8a187600fefa08c66f9839a0696273", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d69308f7aa85b3bf32171803d75fc53bca8a187600fefa08c66f9839a0696273", kill_on_drop: false }` [INFO] [stdout] d69308f7aa85b3bf32171803d75fc53bca8a187600fefa08c66f9839a0696273 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] beda5ddebfc5331a6e5291122c06d8bd57716b153ef78e3ffffd6bbcc7f495e3 [INFO] running `Command { std: "docker" "start" "-a" "beda5ddebfc5331a6e5291122c06d8bd57716b153ef78e3ffffd6bbcc7f495e3", kill_on_drop: false }` [INFO] [stderr] Checking walle_mqtt_protocol v0.1.14 (/opt/rustwide/workdir) [INFO] [stdout] warning: value assigned to `connect_flags` is never read [INFO] [stdout] --> src/v4/connect.rs:112:13 [INFO] [stdout] | [INFO] [stdout] 112 | connect_flags |= login.write(buffer); [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `byte1` is never read [INFO] [stdout] --> src/v4/fixed_header.rs:206:13 [INFO] [stdout] | [INFO] [stdout] 206 | let mut byte1: u8 = 0b0000_0000; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `connect_flags` is never read [INFO] [stdout] --> src/v4/connect.rs:112:13 [INFO] [stdout] | [INFO] [stdout] 112 | connect_flags |= login.write(buffer); [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `resp` is never read [INFO] [stdout] --> src/v4/fixed_header.rs:522:13 [INFO] [stdout] | [INFO] [stdout] 522 | let mut resp: usize = 0; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `byte1` is never read [INFO] [stdout] --> src/v4/fixed_header.rs:206:13 [INFO] [stdout] | [INFO] [stdout] 206 | let mut byte1: u8 = 0b0000_0000; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `resp` is never read [INFO] [stdout] --> src/v4/fixed_header.rs:522:13 [INFO] [stdout] | [INFO] [stdout] 522 | let mut resp: usize = 0; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `qos` is never read [INFO] [stdout] --> src/v4/builder.rs:538:5 [INFO] [stdout] | [INFO] [stdout] 537 | pub struct SubAckBuilder { [INFO] [stdout] | ------------- field in this struct [INFO] [stdout] 538 | qos: QoS, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_fixed_header` is never used [INFO] [stdout] --> src/v4/connect.rs:454:8 [INFO] [stdout] | [INFO] [stdout] 454 | fn build_fixed_header() -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_connect_variable_header` is never used [INFO] [stdout] --> src/v4/connect.rs:468:8 [INFO] [stdout] | [INFO] [stdout] 468 | fn build_connect_variable_header() -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_ack.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 21 | pub struct PubAck { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 22 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubAck` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_comp.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | pub struct PubComp { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 20 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubComp` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_rec.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | pub struct PubRec { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 20 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubRec` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_rel.rs:18:5 [INFO] [stdout] | [INFO] [stdout] 17 | pub struct PubRel { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 18 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubRel` has derived impls for the traits `Clone` and `Debug`, but these are 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/v4/connect.rs:492:14 [INFO] [stdout] | [INFO] [stdout] 480 | let connect = MqttMessageBuilder::connect() [INFO] [stdout] | ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024 [INFO] [stdout] ... [INFO] [stdout] 492 | Some(connect.unwrap()) [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; 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `qos` is never read [INFO] [stdout] --> src/v4/builder.rs:538:5 [INFO] [stdout] | [INFO] [stdout] 537 | pub struct SubAckBuilder { [INFO] [stdout] | ------------- field in this struct [INFO] [stdout] 538 | qos: QoS, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_ack.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 21 | pub struct PubAck { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 22 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubAck` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_comp.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | pub struct PubComp { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 20 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubComp` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_rec.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | pub struct PubRec { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 20 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubRec` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `fixed_header` is never read [INFO] [stdout] --> src/v4/pub_rel.rs:18:5 [INFO] [stdout] | [INFO] [stdout] 17 | pub struct PubRel { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 18 | fixed_header: FixedHeader, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `PubRel` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `walle_mqtt_protocol` (lib test) due to 2 previous errors; 10 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "beda5ddebfc5331a6e5291122c06d8bd57716b153ef78e3ffffd6bbcc7f495e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "beda5ddebfc5331a6e5291122c06d8bd57716b153ef78e3ffffd6bbcc7f495e3", kill_on_drop: false }` [INFO] [stdout] beda5ddebfc5331a6e5291122c06d8bd57716b153ef78e3ffffd6bbcc7f495e3