[INFO] cloning repository https://github.com/anand-prem/twenty-one-days-of-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anand-prem/twenty-one-days-of-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanand-prem%2Ftwenty-one-days-of-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanand-prem%2Ftwenty-one-days-of-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ad786cdac09e8851e2d7db341d8ae844977a2f9
[INFO] testing anand-prem/twenty-one-days-of-rust against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanand-prem%2Ftwenty-one-days-of-rust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anand-prem/twenty-one-days-of-rust on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/anand-prem/twenty-one-days-of-rust
[INFO] finished tweaking git repo https://github.com/anand-prem/twenty-one-days-of-rust
[INFO] tweaked toml for git repo https://github.com/anand-prem/twenty-one-days-of-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/anand-prem/twenty-one-days-of-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1af40420baa55374365c746e83c294b5a0e97aa0ac9b7394bf2b3be370305cd9
[INFO] running `Command { std: "docker" "start" "-a" "1af40420baa55374365c746e83c294b5a0e97aa0ac9b7394bf2b3be370305cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1af40420baa55374365c746e83c294b5a0e97aa0ac9b7394bf2b3be370305cd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1af40420baa55374365c746e83c294b5a0e97aa0ac9b7394bf2b3be370305cd9", kill_on_drop: false }`
[INFO] [stdout] 1af40420baa55374365c746e83c294b5a0e97aa0ac9b7394bf2b3be370305cd9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] babc05b48d83c657e0a76eb2f0b3e33db796ed58c9415dbe1e163672d98be524
[INFO] running `Command { std: "docker" "start" "-a" "babc05b48d83c657e0a76eb2f0b3e33db796ed58c9415dbe1e163672d98be524", kill_on_drop: false }`
[INFO] [stderr]    Compiling twenty-one-days-of-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/day_1.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     name: &'a str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/day_1.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> src/day_1.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     age: u8
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/day_1.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_number_match`
[INFO] [stdout]   --> src/half_hour.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn print_number_match(n: Number) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `Command { std: "docker" "inspect" "babc05b48d83c657e0a76eb2f0b3e33db796ed58c9415dbe1e163672d98be524", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "babc05b48d83c657e0a76eb2f0b3e33db796ed58c9415dbe1e163672d98be524", kill_on_drop: false }`
[INFO] [stdout] babc05b48d83c657e0a76eb2f0b3e33db796ed58c9415dbe1e163672d98be524
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9879f4ed8cb45608a50a244502b54e7349b3ee2b702cbd162e52b0f34d2e80cb
[INFO] running `Command { std: "docker" "start" "-a" "9879f4ed8cb45608a50a244502b54e7349b3ee2b702cbd162e52b0f34d2e80cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling twenty-one-days-of-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/day_1.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     name: &'a str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/day_1.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> src/day_1.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     age: u8
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/day_1.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_number_match`
[INFO] [stdout]   --> src/half_hour.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn print_number_match(n: Number) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "9879f4ed8cb45608a50a244502b54e7349b3ee2b702cbd162e52b0f34d2e80cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9879f4ed8cb45608a50a244502b54e7349b3ee2b702cbd162e52b0f34d2e80cb", kill_on_drop: false }`
[INFO] [stdout] 9879f4ed8cb45608a50a244502b54e7349b3ee2b702cbd162e52b0f34d2e80cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 49aff9ed3c917bcf5ab7b5b3ba9da1746ba0b97c2dea14c4125667a6fc8b752c
[INFO] running `Command { std: "docker" "start" "-a" "49aff9ed3c917bcf5ab7b5b3ba9da1746ba0b97c2dea14c4125667a6fc8b752c", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> src/day_1.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     name: &'a str,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/day_1.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |   #[derive(Debug)]
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `age`
[INFO] [stderr]   --> src/day_1.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     age: u8
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/day_1.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |   #[derive(Debug)]
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_number_match`
[INFO] [stderr]   --> src/half_hour.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn print_number_match(n: Number) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `twenty-one-days-of-rust` (bin "twenty-one-days-of-rust" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/twenty_one_days_of_rust-d059d2f08c282137)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "49aff9ed3c917bcf5ab7b5b3ba9da1746ba0b97c2dea14c4125667a6fc8b752c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49aff9ed3c917bcf5ab7b5b3ba9da1746ba0b97c2dea14c4125667a6fc8b752c", kill_on_drop: false }`
[INFO] [stdout] 49aff9ed3c917bcf5ab7b5b3ba9da1746ba0b97c2dea14c4125667a6fc8b752c