[INFO] cloning repository https://github.com/Norris1z/rust-ds
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Norris1z/rust-ds" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNorris1z%2Frust-ds", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNorris1z%2Frust-ds'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cceaa9a1b178ce9705725ff74c4ff189a50af647
[INFO] testing Norris1z/rust-ds against try#16fbf98f22730e073c09e7b03f0eafb87a295545 for pr-145628-retry-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNorris1z%2Frust-ds" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Norris1z/rust-ds
[INFO] finished tweaking git repo https://github.com/Norris1z/rust-ds
[INFO] tweaked toml for git repo https://github.com/Norris1z/rust-ds written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Norris1z/rust-ds on toolchain 16fbf98f22730e073c09e7b03f0eafb87a295545
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Norris1z/rust-ds 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" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cf58a7fe6984ea0f12ed833c7486339e650cf66ed0b74102b5d0a1e05db9a4d
[INFO] running `Command { std: "docker" "start" "-a" "3cf58a7fe6984ea0f12ed833c7486339e650cf66ed0b74102b5d0a1e05db9a4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cf58a7fe6984ea0f12ed833c7486339e650cf66ed0b74102b5d0a1e05db9a4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cf58a7fe6984ea0f12ed833c7486339e650cf66ed0b74102b5d0a1e05db9a4d", kill_on_drop: false }`
[INFO] [stdout] 3cf58a7fe6984ea0f12ed833c7486339e650cf66ed0b74102b5d0a1e05db9a4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5508fba15b44770c4021ff02e54d124e2803519cdeb0ec92c1b6e8452fcefebe
[INFO] running `Command { std: "docker" "start" "-a" "5508fba15b44770c4021ff02e54d124e2803519cdeb0ec92c1b6e8452fcefebe", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-ds v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/huffman.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct HuffmanTreeItem<'a, T>
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub data: Option<&'a T>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HuffmanTreeItem` 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 0.45s
[INFO] running `Command { std: "docker" "inspect" "5508fba15b44770c4021ff02e54d124e2803519cdeb0ec92c1b6e8452fcefebe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5508fba15b44770c4021ff02e54d124e2803519cdeb0ec92c1b6e8452fcefebe", kill_on_drop: false }`
[INFO] [stdout] 5508fba15b44770c4021ff02e54d124e2803519cdeb0ec92c1b6e8452fcefebe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b184dfdaba8192cd5c900a90c7310cd8f9beb01684bb7d6cab4a3e66051d819
[INFO] running `Command { std: "docker" "start" "-a" "6b184dfdaba8192cd5c900a90c7310cd8f9beb01684bb7d6cab4a3e66051d819", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-ds v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/huffman.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct HuffmanTreeItem<'a, T>
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub data: Option<&'a T>,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HuffmanTreeItem` 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 `test` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "6b184dfdaba8192cd5c900a90c7310cd8f9beb01684bb7d6cab4a3e66051d819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b184dfdaba8192cd5c900a90c7310cd8f9beb01684bb7d6cab4a3e66051d819", kill_on_drop: false }`
[INFO] [stdout] 6b184dfdaba8192cd5c900a90c7310cd8f9beb01684bb7d6cab4a3e66051d819
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+16fbf98f22730e073c09e7b03f0eafb87a295545" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8725c3b631496ebe832aa94de729c9e13c4ba63ece15318d1c3742a159c9f7c4
[INFO] running `Command { std: "docker" "start" "-a" "8725c3b631496ebe832aa94de729c9e13c4ba63ece15318d1c3742a159c9f7c4", kill_on_drop: false }`
[INFO] [stderr] warning: field `data` is never read
[INFO] [stderr]   --> src/huffman.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct HuffmanTreeItem<'a, T>
[INFO] [stderr]    |            --------------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 21 |     pub data: Option<&'a T>,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `HuffmanTreeItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-ds` (bin "rust-ds" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_ds-39c9744858521527)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8725c3b631496ebe832aa94de729c9e13c4ba63ece15318d1c3742a159c9f7c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8725c3b631496ebe832aa94de729c9e13c4ba63ece15318d1c3742a159c9f7c4", kill_on_drop: false }`
[INFO] [stdout] 8725c3b631496ebe832aa94de729c9e13c4ba63ece15318d1c3742a159c9f7c4