[INFO] cloning repository https://github.com/jianshu93/DartUniFrac
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jianshu93/DartUniFrac" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjianshu93%2FDartUniFrac", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d9f6a37b8988ec514293b092a8171c8106acff3
[INFO] checking jianshu93/DartUniFrac against master#dc375db7d8df0aa450e622c529147c95eee756f5 for pr-156749
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjianshu93%2FDartUniFrac" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-1-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/jianshu93/DartUniFrac
[INFO] finished tweaking git repo https://github.com/jianshu93/DartUniFrac
[INFO] tweaked toml for git repo https://github.com/jianshu93/DartUniFrac written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jianshu93/DartUniFrac on toolchain dc375db7d8df0aa450e622c529147c95eee756f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jianshu93/DartUniFrac 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" "+dc375db7d8df0aa450e622c529147c95eee756f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "77aaba803171fe036350421eb28b81d24e22b7d02c4fe20479eacdedf3e0cfb3", kill_on_drop: false }`
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[INFO] [stdout] warning: fields `node_name` and `is_leaf` are never read
[INFO] [stdout]   --> src/emdunifrac.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct TreeIndex {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     node_name: Vec<Option<String>>,   // postorder node -> name
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 40 |     is_leaf: Vec<bool>,               // postorder node -> compact leaf?
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreeIndex` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `node_name` and `is_leaf` are never read
[INFO] [stdout]   --> src/emdunifrac.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct TreeIndex {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     node_name: Vec<Option<String>>,   // postorder node -> name
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 40 |     is_leaf: Vec<bool>,               // postorder node -> compact leaf?
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreeIndex` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 56s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: proc-macro-error2 v2.0.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "77aaba803171fe036350421eb28b81d24e22b7d02c4fe20479eacdedf3e0cfb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77aaba803171fe036350421eb28b81d24e22b7d02c4fe20479eacdedf3e0cfb3", kill_on_drop: false }`
[INFO] [stdout] 77aaba803171fe036350421eb28b81d24e22b7d02c4fe20479eacdedf3e0cfb3
