[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] building PicoJr/2020-hashcode-rust against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPicoJr%2F2020-hashcode-rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PicoJr/2020-hashcode-rust on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-7-tc1/source/Cargo.toml
[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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c57970268d4b3fa9dd8d12fa5b59c83e02e6c62d503f5bfac030a1809b4ea9cc
[INFO] running `Command { std: "docker" "start" "-a" "c57970268d4b3fa9dd8d12fa5b59c83e02e6c62d503f5bfac030a1809b4ea9cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c57970268d4b3fa9dd8d12fa5b59c83e02e6c62d503f5bfac030a1809b4ea9cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c57970268d4b3fa9dd8d12fa5b59c83e02e6c62d503f5bfac030a1809b4ea9cc", kill_on_drop: false }`
[INFO] [stdout] c57970268d4b3fa9dd8d12fa5b59c83e02e6c62d503f5bfac030a1809b4ea9cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65d6485ef27c33ba7ddbb4e1e152431ee5971381edc197fbcc8e309c021278f9
[INFO] running `Command { std: "docker" "start" "-a" "65d6485ef27c33ba7ddbb4e1e152431ee5971381edc197fbcc8e309c021278f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling anyhow v1.0.27
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[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)]` 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 5.93s
[INFO] running `Command { std: "docker" "inspect" "65d6485ef27c33ba7ddbb4e1e152431ee5971381edc197fbcc8e309c021278f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65d6485ef27c33ba7ddbb4e1e152431ee5971381edc197fbcc8e309c021278f9", kill_on_drop: false }`
[INFO] [stdout] 65d6485ef27c33ba7ddbb4e1e152431ee5971381edc197fbcc8e309c021278f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c7c9383a9cda807f6e24bc88dfe27994f724956c9b8d232443c50e49757d001
[INFO] running `Command { std: "docker" "start" "-a" "3c7c9383a9cda807f6e24bc88dfe27994f724956c9b8d232443c50e49757d001", 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)]` 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 0.22s
[INFO] running `Command { std: "docker" "inspect" "3c7c9383a9cda807f6e24bc88dfe27994f724956c9b8d232443c50e49757d001", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c7c9383a9cda807f6e24bc88dfe27994f724956c9b8d232443c50e49757d001", kill_on_drop: false }`
[INFO] [stdout] 3c7c9383a9cda807f6e24bc88dfe27994f724956c9b8d232443c50e49757d001