[INFO] fetching crate iterx 0.0.10...
[INFO] checking iterx-0.0.10 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate iterx 0.0.10 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate iterx 0.0.10
[INFO] finished tweaking crates.io crate iterx 0.0.10
[INFO] tweaked toml for crates.io crate iterx 0.0.10 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate iterx 0.0.10 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.14.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a3583e1f8c562f2c482f6eaef44f1cb55d4f1ddb6d9ce121aa6a2ad95262486
[INFO] running `Command { std: "docker" "start" "-a" "3a3583e1f8c562f2c482f6eaef44f1cb55d4f1ddb6d9ce121aa6a2ad95262486", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a3583e1f8c562f2c482f6eaef44f1cb55d4f1ddb6d9ce121aa6a2ad95262486", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a3583e1f8c562f2c482f6eaef44f1cb55d4f1ddb6d9ce121aa6a2ad95262486", kill_on_drop: false }`
[INFO] [stdout] 3a3583e1f8c562f2c482f6eaef44f1cb55d4f1ddb6d9ce121aa6a2ad95262486
[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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0cd6888dc2366e38e8d04e39d13cfdcd8183709853817c172922326ee1668ea
[INFO] running `Command { std: "docker" "start" "-a" "e0cd6888dc2366e38e8d04e39d13cfdcd8183709853817c172922326ee1668ea", kill_on_drop: false }`
[INFO] [stderr]     Checking iterx v0.0.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:184:24
[INFO] [stdout]     |
[INFO] [stdout] 184 | pub struct MarkLast<I>(bool, std::iter::Peekable<I>)
[INFO] [stdout]     |            --------    ^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 184 - pub struct MarkLast<I>(bool, std::iter::Peekable<I>)
[INFO] [stdout] 184 + pub struct MarkLast<I>((), std::iter::Peekable<I>)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:184:24
[INFO] [stdout]     |
[INFO] [stdout] 184 | pub struct MarkLast<I>(bool, std::iter::Peekable<I>)
[INFO] [stdout]     |            --------    ^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 184 - pub struct MarkLast<I>(bool, std::iter::Peekable<I>)
[INFO] [stdout] 184 + pub struct MarkLast<I>((), std::iter::Peekable<I>)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "e0cd6888dc2366e38e8d04e39d13cfdcd8183709853817c172922326ee1668ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0cd6888dc2366e38e8d04e39d13cfdcd8183709853817c172922326ee1668ea", kill_on_drop: false }`
[INFO] [stdout] e0cd6888dc2366e38e8d04e39d13cfdcd8183709853817c172922326ee1668ea