[INFO] cloning repository https://github.com/Qwaz/too-many-lists
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Qwaz/too-many-lists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQwaz%2Ftoo-many-lists", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQwaz%2Ftoo-many-lists'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6fc2d8674e847616113b382d9015af98c8b31f83
[INFO] checking Qwaz/too-many-lists/6fc2d8674e847616113b382d9015af98c8b31f83 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQwaz%2Ftoo-many-lists" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Qwaz/too-many-lists on toolchain 38352b01ae4af9300be03b805d6db68c45e51068
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Qwaz/too-many-lists
[INFO] finished tweaking git repo https://github.com/Qwaz/too-many-lists
[INFO] tweaked toml for git repo https://github.com/Qwaz/too-many-lists written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Qwaz/too-many-lists 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" "+38352b01ae4af9300be03b805d6db68c45e51068" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d21d8a564d5becff72080168586cf535d8e1dbdb030e57ea080c916b61e9347
[INFO] running `Command { std: "docker" "start" "-a" "8d21d8a564d5becff72080168586cf535d8e1dbdb030e57ea080c916b61e9347", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d21d8a564d5becff72080168586cf535d8e1dbdb030e57ea080c916b61e9347", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d21d8a564d5becff72080168586cf535d8e1dbdb030e57ea080c916b61e9347", kill_on_drop: false }`
[INFO] [stdout] 8d21d8a564d5becff72080168586cf535d8e1dbdb030e57ea080c916b61e9347
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb68b677c2132579f8a40e9c1aac1018118dc82d536fe888773181210d9be8df
[INFO] running `Command { std: "docker" "start" "-a" "cb68b677c2132579f8a40e9c1aac1018118dc82d536fe888773181210d9be8df", kill_on_drop: false }`
[INFO] [stderr]     Checking too-many-lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/fourth.rs:154:24
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Iter<'a, T>(Option<Ref<'a, Node<T>>>);
[INFO] [stdout]     |            ----        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[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 `0` is never read
[INFO] [stdout]    --> src/fourth.rs:154:24
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Iter<'a, T>(Option<Ref<'a, Node<T>>>);
[INFO] [stdout]     |            ----        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[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 0.23s
[INFO] running `Command { std: "docker" "inspect" "cb68b677c2132579f8a40e9c1aac1018118dc82d536fe888773181210d9be8df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb68b677c2132579f8a40e9c1aac1018118dc82d536fe888773181210d9be8df", kill_on_drop: false }`
[INFO] [stdout] cb68b677c2132579f8a40e9c1aac1018118dc82d536fe888773181210d9be8df