[INFO] fetching crate btree 0.1.0...
[INFO] checking btree-0.1.0 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate btree 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate btree 0.1.0 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--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 v0.1.4
[INFO] [stderr]   Downloaded raw_serde_derive v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2e067978cbb49b84a122924df33cae11be9eb317c76d9e0edf932410eda759e8
[INFO] running `Command { std: "docker" "start" "-a" "2e067978cbb49b84a122924df33cae11be9eb317c76d9e0edf932410eda759e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e067978cbb49b84a122924df33cae11be9eb317c76d9e0edf932410eda759e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e067978cbb49b84a122924df33cae11be9eb317c76d9e0edf932410eda759e8", kill_on_drop: false }`
[INFO] [stdout] 2e067978cbb49b84a122924df33cae11be9eb317c76d9e0edf932410eda759e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3ebdf7a7b5264ce797d5d813808533448ef6a3cf29948f143ef5a321cd3956f
[INFO] running `Command { std: "docker" "start" "-a" "a3ebdf7a7b5264ce797d5d813808533448ef6a3cf29948f143ef5a321cd3956f", kill_on_drop: false }`
[INFO] [stderr] warning: `panic` setting is ignored for `test` profile
[INFO] [stderr]    Compiling quote v0.3.15
[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 5.97s
[INFO] running `Command { std: "docker" "inspect" "a3ebdf7a7b5264ce797d5d813808533448ef6a3cf29948f143ef5a321cd3956f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3ebdf7a7b5264ce797d5d813808533448ef6a3cf29948f143ef5a321cd3956f", kill_on_drop: false }`
[INFO] [stdout] a3ebdf7a7b5264ce797d5d813808533448ef6a3cf29948f143ef5a321cd3956f