[INFO] fetching crate b2histogram 1.0.0...
[INFO] testing b2histogram-1.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate b2histogram 1.0.0 into /workspace/builds/worker-91/source
[INFO] validating manifest of crates.io crate b2histogram 1.0.0 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 crates.io crate b2histogram 1.0.0
[INFO] finished tweaking crates.io crate b2histogram 1.0.0
[INFO] tweaked toml for crates.io crate b2histogram 1.0.0 written to /workspace/builds/worker-91/source/Cargo.toml
[INFO] crate crates.io crate b2histogram 1.0.0 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] warning: only one of `license` or `license-file` is necessary
[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-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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] 898b3e0131d4196f763743d6df121ec2645bcb8560b495dc4aa286c4e5c2af1a
[INFO] running `Command { std: "docker" "start" "-a" "898b3e0131d4196f763743d6df121ec2645bcb8560b495dc4aa286c4e5c2af1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "898b3e0131d4196f763743d6df121ec2645bcb8560b495dc4aa286c4e5c2af1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "898b3e0131d4196f763743d6df121ec2645bcb8560b495dc4aa286c4e5c2af1a", kill_on_drop: false }`
[INFO] [stdout] 898b3e0131d4196f763743d6df121ec2645bcb8560b495dc4aa286c4e5c2af1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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] d7b8318af9865916a6e04988098515473cc2c7232f5f6a4d6f5fc005eeaaf0a5
[INFO] running `Command { std: "docker" "start" "-a" "d7b8318af9865916a6e04988098515473cc2c7232f5f6a4d6f5fc005eeaaf0a5", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling b2histogram v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "d7b8318af9865916a6e04988098515473cc2c7232f5f6a4d6f5fc005eeaaf0a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7b8318af9865916a6e04988098515473cc2c7232f5f6a4d6f5fc005eeaaf0a5", kill_on_drop: false }`
[INFO] [stdout] d7b8318af9865916a6e04988098515473cc2c7232f5f6a4d6f5fc005eeaaf0a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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] d4777b9168373d88bf65a52115fc1b087998542484e0b891ad168182d2a4eea6
[INFO] running `Command { std: "docker" "start" "-a" "d4777b9168373d88bf65a52115fc1b087998542484e0b891ad168182d2a4eea6", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling b2histogram v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "d4777b9168373d88bf65a52115fc1b087998542484e0b891ad168182d2a4eea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4777b9168373d88bf65a52115fc1b087998542484e0b891ad168182d2a4eea6", kill_on_drop: false }`
[INFO] [stdout] d4777b9168373d88bf65a52115fc1b087998542484e0b891ad168182d2a4eea6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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] d3120aaddfd38635485c0535f1c95bcd16857c834c21384825f3299bf9da8462
[INFO] running `Command { std: "docker" "start" "-a" "d3120aaddfd38635485c0535f1c95bcd16857c834c21384825f3299bf9da8462", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.60s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/b2histogram-bcb7e12fb52870ab)
[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] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/example-126d6cd9f161cd06)
[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] [stderr]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-696361619e92f54d)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test test::handle_u64_max_value ... ok
[INFO] [stdout] test test::observation_counts_are_cumulative ... ok
[INFO] [stdout] test test::iterating_buckets_is_successful ... ok
[INFO] [stdout] test test::buckets_with_counts_are_identified ... ok
[INFO] [stdout] test test::one_has_its_own_bucket ... ok
[INFO] [stdout] test test::same_value_doesnt_change_bucket_count ... ok
[INFO] [stdout] test test::values_equal_to_bucket_begin_plus_one ... ok
[INFO] [stdout] test test::values_equal_to_bucket_begin ... ok
[INFO] [stdout] test test::zero_has_its_own_bucket ... ok
[INFO] [stdout] test test::values_equal_to_bucket_end ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests b2histogram
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 24) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.74s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d3120aaddfd38635485c0535f1c95bcd16857c834c21384825f3299bf9da8462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3120aaddfd38635485c0535f1c95bcd16857c834c21384825f3299bf9da8462", kill_on_drop: false }`
[INFO] [stdout] d3120aaddfd38635485c0535f1c95bcd16857c834c21384825f3299bf9da8462