[INFO] fetching crate canadensis_serial 0.3.0...
[INFO] checking canadensis_serial-0.3.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate canadensis_serial 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate canadensis_serial 0.3.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate canadensis_serial 0.3.0
[INFO] finished tweaking crates.io crate canadensis_serial 0.3.0
[INFO] tweaked toml for crates.io crate canadensis_serial 0.3.0 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 58 packages to latest compatible versions
[INFO] [stderr]       Adding hash32 v0.2.1 (available: v0.3.1)
[INFO] [stderr]       Adding hashbrown v0.13.2 (available: v0.14.5)
[INFO] [stderr]       Adding heapless v0.7.17 (available: v0.8.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[INFO] [stderr]       Adding zerocopy v0.6.6 (available: v0.7.35)
[INFO] [stderr]       Adding zerocopy-derive v0.6.6 (available: v0.7.35)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b381b6ab6d3f31f1bd01f42ddd89a46fd6e1926c0a0110e4a6336a2fbb996373
[INFO] running `Command { std: "docker" "start" "-a" "b381b6ab6d3f31f1bd01f42ddd89a46fd6e1926c0a0110e4a6336a2fbb996373", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b381b6ab6d3f31f1bd01f42ddd89a46fd6e1926c0a0110e4a6336a2fbb996373", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b381b6ab6d3f31f1bd01f42ddd89a46fd6e1926c0a0110e4a6336a2fbb996373", kill_on_drop: false }`
[INFO] [stdout] b381b6ab6d3f31f1bd01f42ddd89a46fd6e1926c0a0110e4a6336a2fbb996373
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01857854477ef3f6af8d1068d9f0c70cb840a0f95c15cdab959fb2513539f09b
[INFO] running `Command { std: "docker" "start" "-a" "01857854477ef3f6af8d1068d9f0c70cb840a0f95c15cdab959fb2513539f09b", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]     Checking debug-helper v0.3.13
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]     Checking num_threads v0.1.7
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]    Compiling hash32-derive v0.1.1
[INFO] [stderr]     Checking crc-any v2.5.0
[INFO] [stderr]     Checking ahash v0.8.11
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling time-macros v0.2.18
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking fallible_collections v0.4.9
[INFO] [stderr]     Checking canadensis_core v0.3.0
[INFO] [stderr]     Checking time v0.3.36
[INFO] [stderr]     Checking simplelog v0.12.2
[INFO] [stderr]    Compiling zerocopy-derive v0.6.6
[INFO] [stderr]     Checking zerocopy v0.6.6
[INFO] [stderr]     Checking canadensis_header v0.1.0
[INFO] [stderr]     Checking canadensis_serial v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `DecodeError` is never constructed
[INFO] [stdout]    --> src/cobs.rs:173:12
[INFO] [stdout]     |
[INFO] [stdout] 173 | pub struct DecodeError;
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `DecodeError` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.86s
[INFO] running `Command { std: "docker" "inspect" "01857854477ef3f6af8d1068d9f0c70cb840a0f95c15cdab959fb2513539f09b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01857854477ef3f6af8d1068d9f0c70cb840a0f95c15cdab959fb2513539f09b", kill_on_drop: false }`
[INFO] [stdout] 01857854477ef3f6af8d1068d9f0c70cb840a0f95c15cdab959fb2513539f09b