[INFO] cloning repository https://github.com/toasa/zlr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/toasa/zlr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasa%2Fzlr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasa%2Fzlr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c8a0ad7c1a2242967d36167f7799c608408b3b7
[INFO] checking toasa/zlr against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasa%2Fzlr" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/toasa/zlr
[INFO] finished tweaking git repo https://github.com/toasa/zlr
[INFO] tweaked toml for git repo https://github.com/toasa/zlr written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/toasa/zlr on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/toasa/zlr 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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking toasa/zlr against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoasa%2Fzlr" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/toasa/zlr
[INFO] finished tweaking git repo https://github.com/toasa/zlr
[INFO] tweaked toml for git repo https://github.com/toasa/zlr written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/toasa/zlr on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/toasa/zlr 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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 680290b14ece3aa49e9b7c11eb83a970829d6e73e0fc1351825ee1b16fa1f166
[INFO] running `Command { std: "docker" "start" "-a" "680290b14ece3aa49e9b7c11eb83a970829d6e73e0fc1351825ee1b16fa1f166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "680290b14ece3aa49e9b7c11eb83a970829d6e73e0fc1351825ee1b16fa1f166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "680290b14ece3aa49e9b7c11eb83a970829d6e73e0fc1351825ee1b16fa1f166", kill_on_drop: false }`
[INFO] [stdout] 680290b14ece3aa49e9b7c11eb83a970829d6e73e0fc1351825ee1b16fa1f166
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d1961a74557e8960ce4fb68d392dc1bb98220ec636b3d4eefc552efc448fe8b
[INFO] running `Command { std: "docker" "start" "-a" "1d1961a74557e8960ce4fb68d392dc1bb98220ec636b3d4eefc552efc448fe8b", kill_on_drop: false }`
[INFO] [stderr]     Checking ch02 v0.1.0 (/opt/rustwide/workdir/ch02)
[INFO] [stderr]     Checking ch01 v0.1.0 (/opt/rustwide/workdir/ch01)
[INFO] [stderr]     Checking ch06 v0.1.0 (/opt/rustwide/workdir/ch06)
[INFO] [stdout] warning: fields `val` and `next` are never read
[INFO] [stdout]  --> ch02/src/2_1_11/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Node { val: T, next: Box<List<T>> },
[INFO] [stdout]   |     ----   ^^^     ^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, 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: field `buf` is never read
[INFO] [stdout]  --> ch02/src/2_1_11/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Buffer<const S: usize> {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 9 |     buf: [u8; S],
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Buffer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `val` and `next` are never read
[INFO] [stdout]  --> ch02/src/2_1_11/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Node { val: T, next: Box<List<T>> },
[INFO] [stdout]   |     ----   ^^^     ^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, 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: field `buf` is never read
[INFO] [stdout]  --> ch02/src/2_1_11/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Buffer<const S: usize> {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 9 |     buf: [u8; S],
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Buffer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "1d1961a74557e8960ce4fb68d392dc1bb98220ec636b3d4eefc552efc448fe8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d1961a74557e8960ce4fb68d392dc1bb98220ec636b3d4eefc552efc448fe8b", kill_on_drop: false }`
[INFO] [stdout] 1d1961a74557e8960ce4fb68d392dc1bb98220ec636b3d4eefc552efc448fe8b