[INFO] cloning repository https://github.com/AliasT/directory-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AliasT/directory-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAliasT%2Fdirectory-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAliasT%2Fdirectory-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a40ead72a1733ed4434b535bba62e196defb55d1
[INFO] checking AliasT/directory-tree against try#e0f03aec47b100bc29555561bd62a99d1bc6aca5 for pr-86231
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAliasT%2Fdirectory-tree" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AliasT/directory-tree on toolchain e0f03aec47b100bc29555561bd62a99d1bc6aca5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AliasT/directory-tree
[INFO] finished tweaking git repo https://github.com/AliasT/directory-tree
[INFO] tweaked toml for git repo https://github.com/AliasT/directory-tree written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/AliasT/directory-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cslice v0.2.0
[INFO] [stderr]   Downloaded neon-build v0.8.2
[INFO] [stderr]   Downloaded neon-macros v0.8.2
[INFO] [stderr]   Downloaded neon-runtime v0.8.2
[INFO] [stderr]   Downloaded neon v0.8.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61d0eb2ea69ebe4a04ab0035df07c3f036974fe0a89b4ff04de26fecba8da282
[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" "61d0eb2ea69ebe4a04ab0035df07c3f036974fe0a89b4ff04de26fecba8da282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61d0eb2ea69ebe4a04ab0035df07c3f036974fe0a89b4ff04de26fecba8da282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61d0eb2ea69ebe4a04ab0035df07c3f036974fe0a89b4ff04de26fecba8da282", kill_on_drop: false }`
[INFO] [stdout] 61d0eb2ea69ebe4a04ab0035df07c3f036974fe0a89b4ff04de26fecba8da282
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c3a2c49fb75e5ff9baf557a6e536cadec4d0e8edb14235fefc864bf500eee04
[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" "5c3a2c49fb75e5ff9baf557a6e536cadec4d0e8edb14235fefc864bf500eee04", kill_on_drop: false }`
[INFO] [stderr]    Compiling neon-build v0.8.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking cslice v0.2.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking libloading v0.6.7
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking neon-runtime v0.8.2
[INFO] [stderr]    Compiling neon v0.8.2
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling neon-macros v0.8.2
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking directory-tree v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `serde_json`
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.94s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5c3a2c49fb75e5ff9baf557a6e536cadec4d0e8edb14235fefc864bf500eee04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c3a2c49fb75e5ff9baf557a6e536cadec4d0e8edb14235fefc864bf500eee04", kill_on_drop: false }`
[INFO] [stdout] 5c3a2c49fb75e5ff9baf557a6e536cadec4d0e8edb14235fefc864bf500eee04