[INFO] cloning repository https://github.com/sigpher/algorithms-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sigpher/algorithms-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Falgorithms-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Falgorithms-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d5410d9919112a3544cebd6ac050b3599e9c17c
[INFO] building sigpher/algorithms-in-rust against master#ce36a966c79e109dabeef7a47fe68e5294c6d71e for pr-137044-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Falgorithms-in-rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sigpher/algorithms-in-rust on toolchain ce36a966c79e109dabeef7a47fe68e5294c6d71e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sigpher/algorithms-in-rust
[INFO] finished tweaking git repo https://github.com/sigpher/algorithms-in-rust
[INFO] tweaked toml for git repo https://github.com/sigpher/algorithms-in-rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sigpher/algorithms-in-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" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 234852fde52db13d2f33bbfe8015ae10841cf0609bca26bac5ca7bec9257c4e3
[INFO] running `Command { std: "docker" "start" "-a" "234852fde52db13d2f33bbfe8015ae10841cf0609bca26bac5ca7bec9257c4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "234852fde52db13d2f33bbfe8015ae10841cf0609bca26bac5ca7bec9257c4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "234852fde52db13d2f33bbfe8015ae10841cf0609bca26bac5ca7bec9257c4e3", kill_on_drop: false }`
[INFO] [stdout] 234852fde52db13d2f33bbfe8015ae10841cf0609bca26bac5ca7bec9257c4e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b094622a97a1b654f28ae7858d75b3acdb7577cab5169b9333921db7df05844e
[INFO] running `Command { std: "docker" "start" "-a" "b094622a97a1b654f28ae7858d75b3acdb7577cab5169b9333921db7df05844e", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling queue v0.1.0 (/opt/rustwide/workdir/queue)
[INFO] [stderr]    Compiling recursion v0.1.0 (/opt/rustwide/workdir/recursion)
[INFO] [stderr]    Compiling linkedlist v0.1.0 (/opt/rustwide/workdir/linkedlist)
[INFO] [stderr]    Compiling lvec v0.1.0 (/opt/rustwide/workdir/lvec)
[INFO] [stderr]    Compiling stack v0.1.0 (/opt/rustwide/workdir/stack)
[INFO] [stderr]    Compiling deque v0.1.0 (/opt/rustwide/workdir/deque)
[INFO] [stdout] warning: function `basic` is never used
[INFO] [stdout]   --> recursion/src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn basic() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num2str` is never used
[INFO] [stdout]   --> recursion/src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn num2str() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hanoi_test` is never used
[INFO] [stdout]   --> recursion/src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn hanoi_test() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.07s
[INFO] running `Command { std: "docker" "inspect" "b094622a97a1b654f28ae7858d75b3acdb7577cab5169b9333921db7df05844e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b094622a97a1b654f28ae7858d75b3acdb7577cab5169b9333921db7df05844e", kill_on_drop: false }`
[INFO] [stdout] b094622a97a1b654f28ae7858d75b3acdb7577cab5169b9333921db7df05844e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1914f211008e48a8113507880db5f6a2189e524e89fab7904b70fffabf1f151f
[INFO] running `Command { std: "docker" "start" "-a" "1914f211008e48a8113507880db5f6a2189e524e89fab7904b70fffabf1f151f", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling linkedlist v0.1.0 (/opt/rustwide/workdir/linkedlist)
[INFO] [stderr]    Compiling lvec v0.1.0 (/opt/rustwide/workdir/lvec)
[INFO] [stderr]    Compiling recursion v0.1.0 (/opt/rustwide/workdir/recursion)
[INFO] [stderr]    Compiling deque v0.1.0 (/opt/rustwide/workdir/deque)
[INFO] [stderr]    Compiling queue v0.1.0 (/opt/rustwide/workdir/queue)
[INFO] [stderr]    Compiling stack v0.1.0 (/opt/rustwide/workdir/stack)
[INFO] [stdout] warning: function `basic` is never used
[INFO] [stdout]   --> recursion/src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn basic() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `num2str` is never used
[INFO] [stdout]   --> recursion/src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn num2str() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hanoi_test` is never used
[INFO] [stdout]   --> recursion/src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn hanoi_test() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `Command { std: "docker" "inspect" "1914f211008e48a8113507880db5f6a2189e524e89fab7904b70fffabf1f151f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1914f211008e48a8113507880db5f6a2189e524e89fab7904b70fffabf1f151f", kill_on_drop: false }`
[INFO] [stdout] 1914f211008e48a8113507880db5f6a2189e524e89fab7904b70fffabf1f151f