[INFO] cloning repository https://github.com/danieljofficial/dsa-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danieljofficial/dsa-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanieljofficial%2Fdsa-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanieljofficial%2Fdsa-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28ea334d0c97afa04e338edddd9b4effdca8fa05
[INFO] checking danieljofficial/dsa-rust against try#3fada14ee01d755dc8076e611f11bf65b28ffd21 for pr-154971
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanieljofficial%2Fdsa-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/danieljofficial/dsa-rust
[INFO] finished tweaking git repo https://github.com/danieljofficial/dsa-rust
[INFO] tweaked toml for git repo https://github.com/danieljofficial/dsa-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/danieljofficial/dsa-rust on toolchain 3fada14ee01d755dc8076e611f11bf65b28ffd21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/danieljofficial/dsa-rust 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" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2dda81e58008495fb5d866e131592e430ca3bbef6448903ab6adf2e76dfda46f
[INFO] running `Command { std: "docker" "start" "-a" "2dda81e58008495fb5d866e131592e430ca3bbef6448903ab6adf2e76dfda46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2dda81e58008495fb5d866e131592e430ca3bbef6448903ab6adf2e76dfda46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dda81e58008495fb5d866e131592e430ca3bbef6448903ab6adf2e76dfda46f", kill_on_drop: false }`
[INFO] [stdout] 2dda81e58008495fb5d866e131592e430ca3bbef6448903ab6adf2e76dfda46f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3fada14ee01d755dc8076e611f11bf65b28ffd21" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d5bd626f091342c8f19efa8c059628ee19a0c4fc5f2408aa72602e63799f33d
[INFO] running `Command { std: "docker" "start" "-a" "2d5bd626f091342c8f19efa8c059628ee19a0c4fc5f2408aa72602e63799f33d", kill_on_drop: false }`
[INFO] [stderr]     Checking median-of-sorted-arrays v0.1.0 (/opt/rustwide/workdir/problems/median-of-sorted-arrays)
[INFO] [stderr]     Checking reverse-linked-list v0.1.0 (/opt/rustwide/workdir/problems/reverse-linked-list)
[INFO] [stderr]     Checking dsa-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking two-sum v0.1.0 (/opt/rustwide/workdir/problems/two-sum)
[INFO] [stderr]     Checking longest-substring v0.1.0 (/opt/rustwide/workdir/problems/longest-substring)
[INFO] [stderr]     Checking longest-palindromic-substring v0.1.0 (/opt/rustwide/workdir/problems/longest-palindromic-substring)
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]  --> problems/reverse-linked-list/src/main.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 |     type Link = Option<Box<ListNode>>;
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ListNode` is never constructed
[INFO] [stdout]  --> problems/reverse-linked-list/src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct ListNode {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> problems/reverse-linked-list/src/main.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     impl ListNode {
[INFO] [stdout]   |     ------------- associated function in this implementation
[INFO] [stdout] 9 |         fn new(val: i32) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two_numbers` is never used
[INFO] [stdout]   --> problems/reverse-linked-list/src/main.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn add_two_numbers(l1: Link, l2: Link) -> Link {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "2d5bd626f091342c8f19efa8c059628ee19a0c4fc5f2408aa72602e63799f33d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d5bd626f091342c8f19efa8c059628ee19a0c4fc5f2408aa72602e63799f33d", kill_on_drop: false }`
[INFO] [stdout] 2d5bd626f091342c8f19efa8c059628ee19a0c4fc5f2408aa72602e63799f33d