[INFO] cloning repository https://github.com/quigley-c/huffman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quigley-c/huffman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquigley-c%2Fhuffman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquigley-c%2Fhuffman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 39ac08154aedcdd12f3f8f39320283f7212538a1
[INFO] checking quigley-c/huffman against try#35b6491ce6d2b388d0a5de1e59e2123604af807f for pr-136539
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquigley-c%2Fhuffman" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quigley-c/huffman on toolchain 35b6491ce6d2b388d0a5de1e59e2123604af807f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quigley-c/huffman
[INFO] finished tweaking git repo https://github.com/quigley-c/huffman
[INFO] tweaked toml for git repo https://github.com/quigley-c/huffman written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/quigley-c/huffman 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" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df088bd2e44bdc9bed4610f2af907929894393e187a8b45a3033f5612a0774da
[INFO] running `Command { std: "docker" "start" "-a" "df088bd2e44bdc9bed4610f2af907929894393e187a8b45a3033f5612a0774da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df088bd2e44bdc9bed4610f2af907929894393e187a8b45a3033f5612a0774da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df088bd2e44bdc9bed4610f2af907929894393e187a8b45a3033f5612a0774da", kill_on_drop: false }`
[INFO] [stdout] df088bd2e44bdc9bed4610f2af907929894393e187a8b45a3033f5612a0774da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c52fde016654b300e1afe460125c755586813a18dfd5d59a69f46ccd81a54435
[INFO] running `Command { std: "docker" "start" "-a" "c52fde016654b300e1afe460125c755586813a18dfd5d59a69f46ccd81a54435", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-automata v0.4.8
[INFO] [stderr]     Checking regex v1.11.0
[INFO] [stderr]     Checking huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `to` and `val` are never read
[INFO] [stdout]   --> src/binary_heap.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub struct Edge {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 9  |     pub from: usize,
[INFO] [stdout] 10 |     pub to: usize,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 11 |     pub val: usize,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Edge` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `to` and `val` are never read
[INFO] [stdout]   --> src/binary_heap.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub struct Edge {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 9  |     pub from: usize,
[INFO] [stdout] 10 |     pub to: usize,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 11 |     pub val: usize,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Edge` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.49s
[INFO] running `Command { std: "docker" "inspect" "c52fde016654b300e1afe460125c755586813a18dfd5d59a69f46ccd81a54435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c52fde016654b300e1afe460125c755586813a18dfd5d59a69f46ccd81a54435", kill_on_drop: false }`
[INFO] [stdout] c52fde016654b300e1afe460125c755586813a18dfd5d59a69f46ccd81a54435