[INFO] cloning repository https://github.com/Ngozistephen/Merkle_Trie_Verify
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ngozistephen/Merkle_Trie_Verify" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNgozistephen%2FMerkle_Trie_Verify", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNgozistephen%2FMerkle_Trie_Verify'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33aabc8d12e148f49225f379f14332a51918f6ff
[INFO] checking Ngozistephen/Merkle_Trie_Verify against 47574b82ff3fe9b0a45ff65a4fe189e295ecb748 for pr-160780
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNgozistephen%2FMerkle_Trie_Verify" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ngozistephen/Merkle_Trie_Verify
[INFO] finished tweaking git repo https://github.com/Ngozistephen/Merkle_Trie_Verify
[INFO] tweaked toml for git repo https://github.com/Ngozistephen/Merkle_Trie_Verify written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ngozistephen/Merkle_Trie_Verify on toolchain 47574b82ff3fe9b0a45ff65a4fe189e295ecb748
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+47574b82ff3fe9b0a45ff65a4fe189e295ecb748" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ngozistephen/Merkle_Trie_Verify 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" "+47574b82ff3fe9b0a45ff65a4fe189e295ecb748" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69
[INFO] running `Command { std: "docker" "start" "68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69" "/opt/rustwide/cargo-home/bin/cargo" "+47574b82ff3fe9b0a45ff65a4fe189e295ecb748" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69" "/opt/rustwide/cargo-home/bin/cargo" "+47574b82ff3fe9b0a45ff65a4fe189e295ecb748" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking merkle_Trie_project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `leaf_count` is never read
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct MerkleTrie {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 17 |     tree: Vec<Vec<u8>>,
[INFO] [stdout] 18 |     leaf_count: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `leaf_count` is never read
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct MerkleTrie {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 17 |     tree: Vec<Vec<u8>>,
[INFO] [stdout] 18 |     leaf_count: usize,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[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 0.26s
[INFO] running `Command { std: "docker" "inspect" "68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69", kill_on_drop: false }`
[INFO] [stdout] 68abaef3f5fcd3da8d990e1935016e503d34d1ffec3093336628ab8497ff9a69
