[INFO] cloning repository https://github.com/PicoJr/2020-hashcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PicoJr/2020-hashcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPicoJr%2F2020-hashcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPicoJr%2F2020-hashcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e9b9b25c948129137a60c68295d05d073f17f36a
[INFO] testing PicoJr/2020-hashcode-rust against master#198328ad7960b1bece0dc48496bff6c62dd5d339 for pr-149852
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPicoJr%2F2020-hashcode-rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/PicoJr/2020-hashcode-rust
[INFO] finished tweaking git repo https://github.com/PicoJr/2020-hashcode-rust
[INFO] tweaked toml for git repo https://github.com/PicoJr/2020-hashcode-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/PicoJr/2020-hashcode-rust on toolchain 198328ad7960b1bece0dc48496bff6c62dd5d339
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/PicoJr/2020-hashcode-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" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded textwrap v0.11.0
[INFO] [stderr]   Downloaded atty v0.2.14
[INFO] [stderr]   Downloaded strsim v0.8.0
[INFO] [stderr]   Downloaded vec_map v0.8.1
[INFO] [stderr]   Downloaded hermit-abi v0.1.8
[INFO] [stderr]   Downloaded unicode-width v0.1.7
[INFO] [stderr]   Downloaded anyhow v1.0.27
[INFO] [stderr]   Downloaded bitflags v1.2.1
[INFO] [stderr]   Downloaded ansi_term v0.11.0
[INFO] [stderr]   Downloaded clap v2.33.0
[INFO] [stderr]   Downloaded libc v0.2.68
[INFO] [stderr]   Downloaded winapi v0.3.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c4b7d9778db1001d30b7c08ea41455859355f03b3be89d0b86ddc11eb932689
[INFO] running `Command { std: "docker" "start" "-a" "0c4b7d9778db1001d30b7c08ea41455859355f03b3be89d0b86ddc11eb932689", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c4b7d9778db1001d30b7c08ea41455859355f03b3be89d0b86ddc11eb932689", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c4b7d9778db1001d30b7c08ea41455859355f03b3be89d0b86ddc11eb932689", kill_on_drop: false }`
[INFO] [stdout] 0c4b7d9778db1001d30b7c08ea41455859355f03b3be89d0b86ddc11eb932689
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11485c15c94fe14318e78389f15d41fd066acf4a6647ef59da9c38c3baf68d5a
[INFO] running `Command { std: "docker" "start" "-a" "11485c15c94fe14318e78389f15d41fd066acf4a6647ef59da9c38c3baf68d5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling anyhow v1.0.27
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling h2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `n_books` is never read
[INFO] [stdout]  --> src/solver.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Library {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub id: usize,
[INFO] [stdout] 8 |     pub n_books: usize,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Library` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `n_books` and `n_libraries` are never read
[INFO] [stdout]   --> src/solver.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct InputDataSet {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 15 |     pub n_books: usize,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 16 |     pub n_libraries: usize,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.31s
[INFO] running `Command { std: "docker" "inspect" "11485c15c94fe14318e78389f15d41fd066acf4a6647ef59da9c38c3baf68d5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11485c15c94fe14318e78389f15d41fd066acf4a6647ef59da9c38c3baf68d5a", kill_on_drop: false }`
[INFO] [stdout] 11485c15c94fe14318e78389f15d41fd066acf4a6647ef59da9c38c3baf68d5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdd15dd7df4ad0011e2d0e6a11cf13b11abc0c5da9d76ed31f2b042f5c94b90e
[INFO] running `Command { std: "docker" "start" "-a" "fdd15dd7df4ad0011e2d0e6a11cf13b11abc0c5da9d76ed31f2b042f5c94b90e", kill_on_drop: false }`
[INFO] [stderr]    Compiling h2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `n_books` is never read
[INFO] [stdout]  --> src/solver.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Library {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub id: usize,
[INFO] [stdout] 8 |     pub n_books: usize,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Library` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `n_books` and `n_libraries` are never read
[INFO] [stdout]   --> src/solver.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct InputDataSet {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 15 |     pub n_books: usize,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 16 |     pub n_libraries: usize,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "fdd15dd7df4ad0011e2d0e6a11cf13b11abc0c5da9d76ed31f2b042f5c94b90e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdd15dd7df4ad0011e2d0e6a11cf13b11abc0c5da9d76ed31f2b042f5c94b90e", kill_on_drop: false }`
[INFO] [stdout] fdd15dd7df4ad0011e2d0e6a11cf13b11abc0c5da9d76ed31f2b042f5c94b90e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+198328ad7960b1bece0dc48496bff6c62dd5d339" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1f89470c94a9e231f6f37a3f7969b75c62ed0301d88d1fadaede3ee1a0ba1a78
[INFO] running `Command { std: "docker" "start" "-a" "1f89470c94a9e231f6f37a3f7969b75c62ed0301d88d1fadaede3ee1a0ba1a78", kill_on_drop: false }`
[INFO] [stderr] warning: field `n_books` is never read
[INFO] [stderr]  --> src/solver.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Library {
[INFO] [stderr]   |            ------- field in this struct
[INFO] [stderr] 7 |     pub id: usize,
[INFO] [stderr] 8 |     pub n_books: usize,
[INFO] [stderr]   |         ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Library` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `n_books` and `n_libraries` are never read
[INFO] [stderr]   --> src/solver.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub struct InputDataSet {
[INFO] [stderr]    |            ------------ fields in this struct
[INFO] [stderr] 15 |     pub n_books: usize,
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr] 16 |     pub n_libraries: usize,
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `h2020` (bin "h2020" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/h2020-2cee00a923ea5b6f)
[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" "1f89470c94a9e231f6f37a3f7969b75c62ed0301d88d1fadaede3ee1a0ba1a78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f89470c94a9e231f6f37a3f7969b75c62ed0301d88d1fadaede3ee1a0ba1a78", kill_on_drop: false }`
[INFO] [stdout] 1f89470c94a9e231f6f37a3f7969b75c62ed0301d88d1fadaede3ee1a0ba1a78