[INFO] fetching crate debug_tree 0.3.1...
[INFO] checking debug_tree-0.3.1 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate debug_tree 0.3.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate debug_tree 0.3.1 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate debug_tree 0.3.1
[INFO] finished tweaking crates.io crate debug_tree 0.3.1
[INFO] tweaked toml for crates.io crate debug_tree 0.3.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate debug_tree 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02194c3f2db15a48e9aa69ecd81412423680d6a8680b49149291f60c7712d151
[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" "02194c3f2db15a48e9aa69ecd81412423680d6a8680b49149291f60c7712d151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02194c3f2db15a48e9aa69ecd81412423680d6a8680b49149291f60c7712d151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02194c3f2db15a48e9aa69ecd81412423680d6a8680b49149291f60c7712d151", kill_on_drop: false }`
[INFO] [stdout] 02194c3f2db15a48e9aa69ecd81412423680d6a8680b49149291f60c7712d151
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f99750f312e5f3311873459a2f098936bf1e01e6346b883e69e35935ff24a59
[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" "7f99750f312e5f3311873459a2f098936bf1e01e6346b883e69e35935ff24a59", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]     Checking debug_tree v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.12
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stdout] warning: unused imports: `max`, `min`
[INFO] [stdout]  --> src/test.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 |     use std::cmp::{max, min};
[INFO] [stdout]   |                    ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 16.29s
[INFO] running `Command { std: "docker" "inspect" "7f99750f312e5f3311873459a2f098936bf1e01e6346b883e69e35935ff24a59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f99750f312e5f3311873459a2f098936bf1e01e6346b883e69e35935ff24a59", kill_on_drop: false }`
[INFO] [stdout] 7f99750f312e5f3311873459a2f098936bf1e01e6346b883e69e35935ff24a59