[INFO] cloning repository https://github.com/poryduckZ/too-many-lists
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/poryduckZ/too-many-lists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FporyduckZ%2Ftoo-many-lists", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FporyduckZ%2Ftoo-many-lists'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1045332063a15802c17a4897a1671ac84c0c457b
[INFO] checking poryduckZ/too-many-lists against try#8d46be77cd48fdbcced888d027457e2c9cf2aa16 for pr-142723
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FporyduckZ%2Ftoo-many-lists" "/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/poryduckZ/too-many-lists on toolchain 8d46be77cd48fdbcced888d027457e2c9cf2aa16
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/poryduckZ/too-many-lists
[INFO] finished tweaking git repo https://github.com/poryduckZ/too-many-lists
[INFO] tweaked toml for git repo https://github.com/poryduckZ/too-many-lists written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/poryduckZ/too-many-lists 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" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "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-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84d7e372927e33b0cfed067d7fc2601811ef5de18e4eb8f29168140768050614
[INFO] running `Command { std: "docker" "start" "-a" "84d7e372927e33b0cfed067d7fc2601811ef5de18e4eb8f29168140768050614", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84d7e372927e33b0cfed067d7fc2601811ef5de18e4eb8f29168140768050614", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84d7e372927e33b0cfed067d7fc2601811ef5de18e4eb8f29168140768050614", kill_on_drop: false }`
[INFO] [stdout] 84d7e372927e33b0cfed067d7fc2601811ef5de18e4eb8f29168140768050614
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ea07e42c400240c1703c7c30c3b2690d0e3af8a322ffbde51b8b00e949d2ece
[INFO] running `Command { std: "docker" "start" "-a" "2ea07e42c400240c1703c7c30c3b2690d0e3af8a322ffbde51b8b00e949d2ece", kill_on_drop: false }`
[INFO] [stderr]     Checking too-many-lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `elem` and `next` are never read
[INFO] [stdout]  --> src/first.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Node {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 2 |     elem: i32,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 3 |     next: Link,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Empty` and `More` are never constructed
[INFO] [stdout]  --> src/first.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Link {
[INFO] [stdout]   |      ---- variants in this enum
[INFO] [stdout] 7 |     Empty,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     More(Box<Node>),
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `elem` and `next` are never read
[INFO] [stdout]  --> src/first.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Node {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 2 |     elem: i32,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 3 |     next: Link,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Empty` and `More` are never constructed
[INFO] [stdout]  --> src/first.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Link {
[INFO] [stdout]   |      ---- variants in this enum
[INFO] [stdout] 7 |     Empty,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     More(Box<Node>),
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "2ea07e42c400240c1703c7c30c3b2690d0e3af8a322ffbde51b8b00e949d2ece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ea07e42c400240c1703c7c30c3b2690d0e3af8a322ffbde51b8b00e949d2ece", kill_on_drop: false }`
[INFO] [stdout] 2ea07e42c400240c1703c7c30c3b2690d0e3af8a322ffbde51b8b00e949d2ece