[INFO] fetching crate common-tree 0.2.0...
[INFO] checking common-tree-0.2.0 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] extracting crate common-tree 0.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate common-tree 0.2.0 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 crates.io crate common-tree 0.2.0
[INFO] finished tweaking crates.io crate common-tree 0.2.0
[INFO] tweaked toml for crates.io crate common-tree 0.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate common-tree 0.2.0 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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 697b8c9c96e3876c4bc9ed467504a3d8e7ac64d8ba4e9dd1a38a548855400f96
[INFO] running `Command { std: "docker" "start" "-a" "697b8c9c96e3876c4bc9ed467504a3d8e7ac64d8ba4e9dd1a38a548855400f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "697b8c9c96e3876c4bc9ed467504a3d8e7ac64d8ba4e9dd1a38a548855400f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "697b8c9c96e3876c4bc9ed467504a3d8e7ac64d8ba4e9dd1a38a548855400f96", kill_on_drop: false }`
[INFO] [stdout] 697b8c9c96e3876c4bc9ed467504a3d8e7ac64d8ba4e9dd1a38a548855400f96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 21baac8c7940d58a649931b210140655837ccd2e865f90672c78e4d7ca3b87b5
[INFO] running `Command { std: "docker" "start" "-a" "21baac8c7940d58a649931b210140655837ccd2e865f90672c78e4d7ca3b87b5", kill_on_drop: false }`
[INFO] [stderr]     Checking common-tree v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `level2_2`
[INFO] [stdout]    --> src/node.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let level2_2 = Node::new(level2_2_data.clone());
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_level2_2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` 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 0.25s
[INFO] running `Command { std: "docker" "inspect" "21baac8c7940d58a649931b210140655837ccd2e865f90672c78e4d7ca3b87b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21baac8c7940d58a649931b210140655837ccd2e865f90672c78e4d7ca3b87b5", kill_on_drop: false }`
[INFO] [stdout] 21baac8c7940d58a649931b210140655837ccd2e865f90672c78e4d7ca3b87b5