[INFO] cloning repository https://github.com/polo-language/btree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/polo-language/btree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolo-language%2Fbtree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolo-language%2Fbtree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba28f1212a2314dc7def9c084472943140ae6046
[INFO] testing polo-language/btree against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolo-language%2Fbtree" "/workspace/builds/worker-27/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-27/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/polo-language/btree on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/polo-language/btree
[INFO] finished tweaking git repo https://github.com/polo-language/btree
[INFO] tweaked toml for git repo https://github.com/polo-language/btree written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] crate git repo https://github.com/polo-language/btree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c59ba98a9c5a5ec97ff8ccf0d300ed3da2258180b92346a500a9c117b348b60
[INFO] running `Command { std: "docker" "start" "-a" "8c59ba98a9c5a5ec97ff8ccf0d300ed3da2258180b92346a500a9c117b348b60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c59ba98a9c5a5ec97ff8ccf0d300ed3da2258180b92346a500a9c117b348b60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c59ba98a9c5a5ec97ff8ccf0d300ed3da2258180b92346a500a9c117b348b60", kill_on_drop: false }`
[INFO] [stdout] 8c59ba98a9c5a5ec97ff8ccf0d300ed3da2258180b92346a500a9c117b348b60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e99b3344c2f3c9d9f8f44f9de97c50e0e0f07bff256a28fe18cac0cdcd2f047c
[INFO] running `Command { std: "docker" "start" "-a" "e99b3344c2f3c9d9f8f44f9de97c50e0e0f07bff256a28fe18cac0cdcd2f047c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling btree v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.13s
[INFO] running `Command { std: "docker" "inspect" "e99b3344c2f3c9d9f8f44f9de97c50e0e0f07bff256a28fe18cac0cdcd2f047c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e99b3344c2f3c9d9f8f44f9de97c50e0e0f07bff256a28fe18cac0cdcd2f047c", kill_on_drop: false }`
[INFO] [stdout] e99b3344c2f3c9d9f8f44f9de97c50e0e0f07bff256a28fe18cac0cdcd2f047c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eab35f385475688df61bd452694a2ecba13ef7b597d2ffd96ca78a88a758eaa
[INFO] running `Command { std: "docker" "start" "-a" "8eab35f385475688df61bd452694a2ecba13ef7b597d2ffd96ca78a88a758eaa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling btree v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2m 25s
[INFO] running `Command { std: "docker" "inspect" "8eab35f385475688df61bd452694a2ecba13ef7b597d2ffd96ca78a88a758eaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eab35f385475688df61bd452694a2ecba13ef7b597d2ffd96ca78a88a758eaa", kill_on_drop: false }`
[INFO] [stdout] 8eab35f385475688df61bd452694a2ecba13ef7b597d2ffd96ca78a88a758eaa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c9455e90f151ee5563271d4c3a707d96f7b43408355081252013eab55bbaee61
[INFO] running `Command { std: "docker" "start" "-a" "c9455e90f151ee5563271d4c3a707d96f7b43408355081252013eab55bbaee61", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.69s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/btree-ebad2a2a424cfef7)
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test node::tests::delete_from_root ... ok
[INFO] [stdout] test node::tests::new_root ... ok
[INFO] [stdout] test tests::clear ... ok
[INFO] [stdout] test node::tests::delete ... ok
[INFO] [stdout] test tests::insert_search ... ok
[INFO] [stdout] test tests::new_tree ... ok
[INFO] [stdout] test node::tests::update ... ok
[INFO] [stdout] test tests::new_tree_min_deg ... ok
[INFO] [stdout] test node::tests::key_counts ... ok
[INFO] [stdout] test node::tests::only_one_root ... ok
[INFO] [stdout] test node::tests::n_key_len ... ok
[INFO] [stdout] test node::tests::all_leaves_same_height ... ok
[INFO] [stdout] test node::tests::get ... ok
[INFO] [stdout] test node::tests::child_counts ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.83s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests btree
[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" "c9455e90f151ee5563271d4c3a707d96f7b43408355081252013eab55bbaee61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9455e90f151ee5563271d4c3a707d96f7b43408355081252013eab55bbaee61", kill_on_drop: false }`
[INFO] [stdout] c9455e90f151ee5563271d4c3a707d96f7b43408355081252013eab55bbaee61