[INFO] cloning repository https://github.com/CandySunPlus/rust-linklist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CandySunPlus/rust-linklist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCandySunPlus%2Frust-linklist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCandySunPlus%2Frust-linklist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2a3db24a368973e9a6a2f2bb24d6cecbec183bb0
[INFO] building CandySunPlus/rust-linklist against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCandySunPlus%2Frust-linklist" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CandySunPlus/rust-linklist on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CandySunPlus/rust-linklist
[INFO] finished tweaking git repo https://github.com/CandySunPlus/rust-linklist
[INFO] tweaked toml for git repo https://github.com/CandySunPlus/rust-linklist written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/CandySunPlus/rust-linklist 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" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0efa8a2125ce7c5634a75d9a9c10aac75feef77ea2008c0b9639c5c86bfa976
[INFO] running `Command { std: "docker" "start" "-a" "e0efa8a2125ce7c5634a75d9a9c10aac75feef77ea2008c0b9639c5c86bfa976", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0efa8a2125ce7c5634a75d9a9c10aac75feef77ea2008c0b9639c5c86bfa976", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0efa8a2125ce7c5634a75d9a9c10aac75feef77ea2008c0b9639c5c86bfa976", kill_on_drop: false }`
[INFO] [stdout] e0efa8a2125ce7c5634a75d9a9c10aac75feef77ea2008c0b9639c5c86bfa976
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d054026e67e5f13dc2be838265b140af3257f2f281a7370f09290396ae774b84
[INFO] running `Command { std: "docker" "start" "-a" "d054026e67e5f13dc2be838265b140af3257f2f281a7370f09290396ae774b84", kill_on_drop: false }`
[INFO] [stderr]    Compiling lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `back` is never read
[INFO] [stdout]   --> src/six.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Iter<'a, T> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 19 |     front: Link<T>,
[INFO] [stdout] 20 |     back: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `front`, `back`, and `len` are never read
[INFO] [stdout]   --> src/six.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct IterMut<'a, T> {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 26 |     front: Link<T>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     back: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 28 |     len: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `list` is never read
[INFO] [stdout]   --> src/six.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct IntoIter<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 33 |     list: LinkedList<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "d054026e67e5f13dc2be838265b140af3257f2f281a7370f09290396ae774b84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d054026e67e5f13dc2be838265b140af3257f2f281a7370f09290396ae774b84", kill_on_drop: false }`
[INFO] [stdout] d054026e67e5f13dc2be838265b140af3257f2f281a7370f09290396ae774b84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e879589d1de1569b27441fd5299798cf633199ddec4cf723577cb08a91861433
[INFO] running `Command { std: "docker" "start" "-a" "e879589d1de1569b27441fd5299798cf633199ddec4cf723577cb08a91861433", kill_on_drop: false }`
[INFO] [stderr]    Compiling lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `back` is never read
[INFO] [stdout]   --> src/six.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Iter<'a, T> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 19 |     front: Link<T>,
[INFO] [stdout] 20 |     back: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `front`, `back`, and `len` are never read
[INFO] [stdout]   --> src/six.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct IterMut<'a, T> {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 26 |     front: Link<T>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     back: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 28 |     len: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `list` is never read
[INFO] [stdout]   --> src/six.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct IntoIter<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 33 |     list: LinkedList<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `back` is never read
[INFO] [stdout]   --> src/six.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Iter<'a, T> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 19 |     front: Link<T>,
[INFO] [stdout] 20 |     back: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `front`, `back`, and `len` are never read
[INFO] [stdout]   --> src/six.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct IterMut<'a, T> {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 26 |     front: Link<T>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     back: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 28 |     len: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `list` is never read
[INFO] [stdout]   --> src/six.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct IntoIter<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 33 |     list: LinkedList<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "e879589d1de1569b27441fd5299798cf633199ddec4cf723577cb08a91861433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e879589d1de1569b27441fd5299798cf633199ddec4cf723577cb08a91861433", kill_on_drop: false }`
[INFO] [stdout] e879589d1de1569b27441fd5299798cf633199ddec4cf723577cb08a91861433
