[INFO] fetching crate btree 0.1.0...
[INFO] checking btree-0.1.0 against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] extracting crate btree 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate btree 0.1.0 on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate btree 0.1.0
[INFO] finished tweaking crates.io crate btree 0.1.0
[INFO] tweaked toml for crates.io crate btree 0.1.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded raw_serde_derive v0.1.2
[INFO] [stderr]   Downloaded raw_serde v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25e03d8ea1bb8075ab2da60f3e28a48848afc23ac818576143043f43c715c7f2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "25e03d8ea1bb8075ab2da60f3e28a48848afc23ac818576143043f43c715c7f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25e03d8ea1bb8075ab2da60f3e28a48848afc23ac818576143043f43c715c7f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25e03d8ea1bb8075ab2da60f3e28a48848afc23ac818576143043f43c715c7f2", kill_on_drop: false }`
[INFO] [stdout] 25e03d8ea1bb8075ab2da60f3e28a48848afc23ac818576143043f43c715c7f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 24b5d9a86987ad2bc52cfd460dc94b13f0951941385d32fbf711300739703e26
[INFO] running `Command { std: "docker" "start" "-a" "24b5d9a86987ad2bc52cfd460dc94b13f0951941385d32fbf711300739703e26", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling raw_serde_derive v0.1.2
[INFO] [stderr]     Checking raw_serde v0.1.4
[INFO] [stderr]     Checking btree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let x = t.search(&i.to_string()).unwrap().unwrap();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[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 [unoptimized + debuginfo] target(s) in 10.87s
[INFO] running `Command { std: "docker" "inspect" "24b5d9a86987ad2bc52cfd460dc94b13f0951941385d32fbf711300739703e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24b5d9a86987ad2bc52cfd460dc94b13f0951941385d32fbf711300739703e26", kill_on_drop: false }`
[INFO] [stdout] 24b5d9a86987ad2bc52cfd460dc94b13f0951941385d32fbf711300739703e26