[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 try#334963c956d25708feab489a3816ae63f639355d 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-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CandySunPlus/rust-linklist on toolchain 334963c956d25708feab489a3816ae63f639355d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "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-tc2/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" "+334963c956d25708feab489a3816ae63f639355d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 116efa637f64927c6fe2cc248fab6972742ea32e69d072308afaac2135c4eb23
[INFO] running `Command { std: "docker" "start" "-a" "116efa637f64927c6fe2cc248fab6972742ea32e69d072308afaac2135c4eb23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "116efa637f64927c6fe2cc248fab6972742ea32e69d072308afaac2135c4eb23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "116efa637f64927c6fe2cc248fab6972742ea32e69d072308afaac2135c4eb23", kill_on_drop: false }`
[INFO] [stdout] 116efa637f64927c6fe2cc248fab6972742ea32e69d072308afaac2135c4eb23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 854122578c586d1750e5c602be22ccb9be87218ae6f35f46a135081282a4b522
[INFO] running `Command { std: "docker" "start" "-a" "854122578c586d1750e5c602be22ccb9be87218ae6f35f46a135081282a4b522", 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 0.23s
[INFO] running `Command { std: "docker" "inspect" "854122578c586d1750e5c602be22ccb9be87218ae6f35f46a135081282a4b522", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "854122578c586d1750e5c602be22ccb9be87218ae6f35f46a135081282a4b522", kill_on_drop: false }`
[INFO] [stdout] 854122578c586d1750e5c602be22ccb9be87218ae6f35f46a135081282a4b522
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec722691a285330d3c565970c2ea846cf9cda2db299e4ed9145f2d22c4ae766d
[INFO] running `Command { std: "docker" "start" "-a" "ec722691a285330d3c565970c2ea846cf9cda2db299e4ed9145f2d22c4ae766d", kill_on_drop: false }`
[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]    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 `test` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "ec722691a285330d3c565970c2ea846cf9cda2db299e4ed9145f2d22c4ae766d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec722691a285330d3c565970c2ea846cf9cda2db299e4ed9145f2d22c4ae766d", kill_on_drop: false }`
[INFO] [stdout] ec722691a285330d3c565970c2ea846cf9cda2db299e4ed9145f2d22c4ae766d
