[INFO] fetching crate nerdondon-hopscotch 2.6.1...
[INFO] testing nerdondon-hopscotch-2.6.1 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate nerdondon-hopscotch 2.6.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate nerdondon-hopscotch 2.6.1 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nerdondon-hopscotch 2.6.1
[INFO] finished tweaking crates.io crate nerdondon-hopscotch 2.6.1
[INFO] tweaked toml for crates.io crate nerdondon-hopscotch 2.6.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8bd9a153158fe25d03794889e250e590ba0c8417f8b722297c94001408957d95
[INFO] running `Command { std: "docker" "start" "-a" "8bd9a153158fe25d03794889e250e590ba0c8417f8b722297c94001408957d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8bd9a153158fe25d03794889e250e590ba0c8417f8b722297c94001408957d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bd9a153158fe25d03794889e250e590ba0c8417f8b722297c94001408957d95", kill_on_drop: false }`
[INFO] [stdout] 8bd9a153158fe25d03794889e250e590ba0c8417f8b722297c94001408957d95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 45f3fbb311169a6cdcf31b91934810fa94da36c8266cc31730b6821841ec543a
[INFO] running `Command { std: "docker" "start" "-a" "45f3fbb311169a6cdcf31b91934810fa94da36c8266cc31730b6821841ec543a", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.5
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rand_distr v0.4.3
[INFO] [stderr]    Compiling nerdondon-hopscotch v2.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `Command { std: "docker" "inspect" "45f3fbb311169a6cdcf31b91934810fa94da36c8266cc31730b6821841ec543a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45f3fbb311169a6cdcf31b91934810fa94da36c8266cc31730b6821841ec543a", kill_on_drop: false }`
[INFO] [stdout] 45f3fbb311169a6cdcf31b91934810fa94da36c8266cc31730b6821841ec543a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a73ed1b977169ccfe5578a73f92fa5cd4380ccbc6ec78d149f5b3dbaa1138a6
[INFO] running `Command { std: "docker" "start" "-a" "8a73ed1b977169ccfe5578a73f92fa5cd4380ccbc6ec78d149f5b3dbaa1138a6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling pretty_assertions v1.1.0
[INFO] [stderr]    Compiling nerdondon-hopscotch v2.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.75s
[INFO] running `Command { std: "docker" "inspect" "8a73ed1b977169ccfe5578a73f92fa5cd4380ccbc6ec78d149f5b3dbaa1138a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a73ed1b977169ccfe5578a73f92fa5cd4380ccbc6ec78d149f5b3dbaa1138a6", kill_on_drop: false }`
[INFO] [stdout] 8a73ed1b977169ccfe5578a73f92fa5cd4380ccbc6ec78d149f5b3dbaa1138a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 529e5bbd50b897c8417418d8f9c141508639614feb108d6c039a990e2707ab7d
[INFO] running `Command { std: "docker" "start" "-a" "529e5bbd50b897c8417418d8f9c141508639614feb108d6c039a990e2707ab7d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/nerdondon_hopscotch-8dc81ebd760216df)
[INFO] [stdout] 
[INFO] [stdout] running 26 tests
[INFO] [stdout] test skiplist::tests::entries_returns_a_vec_with_the_key_value_pairs_of_elements ... ok
[INFO] [stdout] test skiplist::tests::get_an_element_at_the_head ... ok
[INFO] [stdout] test skiplist::tests::get_an_element_in_the_middle ... ok
[INFO] [stdout] test skiplist::tests::get_an_element_at_the_tail ... ok
[INFO] [stdout] test skiplist::tests::insert_can_add_an_element_after_an_existing_element ... ok
[INFO] [stdout] test skiplist::tests::insert_can_add_an_element_between_existing_elements ... ok
[INFO] [stdout] test skiplist::tests::insert_can_add_an_element_before_an_existing_element ... ok
[INFO] [stdout] test skiplist::tests::get_approx_mem_usage_provides_decent_estimates ... ok
[INFO] [stdout] test skiplist::tests::remove_can_remove_an_item_from_the_back_of_the_skip_list ... ok
[INFO] [stdout] test skiplist::tests::remove_can_remove_an_item_from_the_front_of_the_skip_list ... ok
[INFO] [stdout] test skiplist::tests::with_a_non_empty_skiplist_find_greater_or_equal_returns_correct_responses ... ok
[INFO] [stdout] test skiplist::tests::remove_can_remove_an_item_from_the_middle_of_the_skip_list ... ok
[INFO] [stdout] test skiplist::tests::with_a_non_empty_skiplist_first_returns_references_to_the_first_key_value_pair ... ok
[INFO] [stdout] test skiplist::tests::remove_can_remove_all_elements_from_the_skip_list ... ok
[INFO] [stdout] test skiplist::tests::with_a_non_empty_skiplist_find_less_than_returns_correct_responses ... ok
[INFO] [stdout] test skiplist::tests::with_a_non_empty_skiplist_getting_a_non_existent_element_returns_none ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_collect_returns_an_empty_vec ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_first_returns_none ... ok
[INFO] [stdout] test skiplist::tests::with_a_non_empty_skiplist_is_empty_returns_false ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_get_returns_none ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_is_empty_returns_true ... ok
[INFO] [stdout] test skiplist::tests::with_a_non_empty_skiplist_last_returns_references_to_the_last_key_value_pair ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_last_returns_none ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_len_returns_zero ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_insert_can_add_an_element ... ok
[INFO] [stdout] test skiplist::tests::with_an_empty_skiplist_remove_does_nothing ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 26 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nerdondon-hopscotch
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::new (line 90) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::entries (line 430) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K,V>::insert (line 133) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.50s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "529e5bbd50b897c8417418d8f9c141508639614feb108d6c039a990e2707ab7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "529e5bbd50b897c8417418d8f9c141508639614feb108d6c039a990e2707ab7d", kill_on_drop: false }`
[INFO] [stdout] 529e5bbd50b897c8417418d8f9c141508639614feb108d6c039a990e2707ab7d