[INFO] fetching crate ushcn 0.2.2...
[INFO] checking ushcn-0.2.2 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate ushcn 0.2.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate ushcn 0.2.2 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 ushcn 0.2.2
[INFO] finished tweaking crates.io crate ushcn 0.2.2
[INFO] tweaked toml for crates.io crate ushcn 0.2.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate ushcn 0.2.2 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e5f23816d9068adaff8ce88352eecaebbb02454600f65a6be961451f4a3c03e
[INFO] running `Command { std: "docker" "start" "-a" "6e5f23816d9068adaff8ce88352eecaebbb02454600f65a6be961451f4a3c03e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e5f23816d9068adaff8ce88352eecaebbb02454600f65a6be961451f4a3c03e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e5f23816d9068adaff8ce88352eecaebbb02454600f65a6be961451f4a3c03e", kill_on_drop: false }`
[INFO] [stdout] 6e5f23816d9068adaff8ce88352eecaebbb02454600f65a6be961451f4a3c03e
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 114cc87789cee5860a2676cae7c2fc30b1e6a74fdd6756a3732c82ded38d863d
[INFO] running `Command { std: "docker" "start" "-a" "114cc87789cee5860a2676cae7c2fc30b1e6a74fdd6756a3732c82ded38d863d", kill_on_drop: false }`
[INFO] [stderr]     Checking bytes v1.6.0
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[INFO] [stderr]     Checking ushcn v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `month` is never read
[INFO] [stdout]   --> src/reading/monthly.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct MonthlyReading {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub month: Option<u16>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MonthlyReading` 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] [stdout] warning: field `month` is never read
[INFO] [stdout]   --> src/reading/monthly.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct MonthlyReading {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub month: Option<u16>,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MonthlyReading` 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 1m 12s
[INFO] running `Command { std: "docker" "inspect" "114cc87789cee5860a2676cae7c2fc30b1e6a74fdd6756a3732c82ded38d863d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "114cc87789cee5860a2676cae7c2fc30b1e6a74fdd6756a3732c82ded38d863d", kill_on_drop: false }`
[INFO] [stdout] 114cc87789cee5860a2676cae7c2fc30b1e6a74fdd6756a3732c82ded38d863d