[INFO] fetching crate rust_combinatorics 0.1.0...
[INFO] testing rust_combinatorics-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate rust_combinatorics 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate rust_combinatorics 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust_combinatorics 0.1.0
[INFO] finished tweaking crates.io crate rust_combinatorics 0.1.0
[INFO] tweaked toml for crates.io crate rust_combinatorics 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c7524fbf6df7c00cdf1c43fe2bdb95dc439c72e1eab5b45c260802542f42e212
[INFO] running `Command { std: "docker" "start" "-a" "c7524fbf6df7c00cdf1c43fe2bdb95dc439c72e1eab5b45c260802542f42e212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7524fbf6df7c00cdf1c43fe2bdb95dc439c72e1eab5b45c260802542f42e212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7524fbf6df7c00cdf1c43fe2bdb95dc439c72e1eab5b45c260802542f42e212", kill_on_drop: false }`
[INFO] [stdout] c7524fbf6df7c00cdf1c43fe2bdb95dc439c72e1eab5b45c260802542f42e212
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b1dde6c0ccb7bcb506f89657d02ef9cbd92d097702dc09d098b7e165a392ce3
[INFO] running `Command { std: "docker" "start" "-a" "9b1dde6c0ccb7bcb506f89657d02ef9cbd92d097702dc09d098b7e165a392ce3", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_combinatorics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "9b1dde6c0ccb7bcb506f89657d02ef9cbd92d097702dc09d098b7e165a392ce3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b1dde6c0ccb7bcb506f89657d02ef9cbd92d097702dc09d098b7e165a392ce3", kill_on_drop: false }`
[INFO] [stdout] 9b1dde6c0ccb7bcb506f89657d02ef9cbd92d097702dc09d098b7e165a392ce3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a532a960ffc5ea15a65df0e6c23f4a5b1c4a4f1b6f3eb57618647135998e0f76
[INFO] running `Command { std: "docker" "start" "-a" "a532a960ffc5ea15a65df0e6c23f4a5b1c4a4f1b6f3eb57618647135998e0f76", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_combinatorics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "a532a960ffc5ea15a65df0e6c23f4a5b1c4a4f1b6f3eb57618647135998e0f76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a532a960ffc5ea15a65df0e6c23f4a5b1c4a4f1b6f3eb57618647135998e0f76", kill_on_drop: false }`
[INFO] [stdout] a532a960ffc5ea15a65df0e6c23f4a5b1c4a4f1b6f3eb57618647135998e0f76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 372dd5931afc265e3684fab5926a23e50d4b2cb0a4bb7c3e2e876138f6921ade
[INFO] running `Command { std: "docker" "start" "-a" "372dd5931afc265e3684fab5926a23e50d4b2cb0a4bb7c3e2e876138f6921ade", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 6 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_combinatorics-01146a6cfc86774f)
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_each_item_combination_when_choosing_two_from_a_list_with_five_items ... ok
[INFO] [stderr]    Doc-tests rust_combinatorics
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_none_when_choosing_one_from_an_empty_list ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_the_empty_vector_when_choosing_zero_from_a_list_with_elements ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_each_item_when_choosing_one_from_a_list_with_items ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_each_item_combination_when_choosing_two_from_a_list_with_items ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_the_empty_vector_when_choosing_zero_from_an_empty_list ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[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" "372dd5931afc265e3684fab5926a23e50d4b2cb0a4bb7c3e2e876138f6921ade", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "372dd5931afc265e3684fab5926a23e50d4b2cb0a4bb7c3e2e876138f6921ade", kill_on_drop: false }`
[INFO] [stdout] 372dd5931afc265e3684fab5926a23e50d4b2cb0a4bb7c3e2e876138f6921ade