[INFO] fetching crate prometheus-utils 0.5.1...
[INFO] testing prometheus-utils-0.5.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate prometheus-utils 0.5.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate prometheus-utils 0.5.1 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] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking crates.io crate prometheus-utils 0.5.1
[INFO] finished tweaking crates.io crate prometheus-utils 0.5.1
[INFO] tweaked toml for crates.io crate prometheus-utils 0.5.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 6a81fb9b719f8bdc7ab2ee42e7ddcad4d08d2a9189010de3a0d8c1d74b03280f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6a81fb9b719f8bdc7ab2ee42e7ddcad4d08d2a9189010de3a0d8c1d74b03280f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a81fb9b719f8bdc7ab2ee42e7ddcad4d08d2a9189010de3a0d8c1d74b03280f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a81fb9b719f8bdc7ab2ee42e7ddcad4d08d2a9189010de3a0d8c1d74b03280f", kill_on_drop: false }`
[INFO] [stdout] 6a81fb9b719f8bdc7ab2ee42e7ddcad4d08d2a9189010de3a0d8c1d74b03280f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 9567b6ff43ae2f080b0a5fb0f085fd56fdc2b894567894c26e2120750b954f63
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9567b6ff43ae2f080b0a5fb0f085fd56fdc2b894567894c26e2120750b954f63", kill_on_drop: false }`
[INFO] [stderr]    Compiling prometheus v0.12.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling pin-project v1.0.8
[INFO] [stderr]    Compiling prometheus-utils v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dyn_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:57:34
[INFO] [stdout]    |
[INFO] [stdout] 57 |     resource_guards: Vec<Box<dyn Drop + Send>>,
[INFO] [stdout]    |                                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn with_guard<GuardFn: FnOnce() -> Option<Box<dyn Drop + Send>> + Send + 'static>(
[INFO] [stdout]    |                                                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.56s
[INFO] running `Command { std: "docker" "inspect" "9567b6ff43ae2f080b0a5fb0f085fd56fdc2b894567894c26e2120750b954f63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9567b6ff43ae2f080b0a5fb0f085fd56fdc2b894567894c26e2120750b954f63", kill_on_drop: false }`
[INFO] [stdout] 9567b6ff43ae2f080b0a5fb0f085fd56fdc2b894567894c26e2120750b954f63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 409d4626db6023956172f770631d58d60512f167bf7947f993d5ae6eaf96e3c2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "409d4626db6023956172f770631d58d60512f167bf7947f993d5ae6eaf96e3c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dyn_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:57:34
[INFO] [stdout]    |
[INFO] [stdout] 57 |     resource_guards: Vec<Box<dyn Drop + Send>>,
[INFO] [stdout]    |                                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn with_guard<GuardFn: FnOnce() -> Option<Box<dyn Drop + Send>> + Send + 'static>(
[INFO] [stdout]    |                                                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tokio v0.2.25
[INFO] [stderr]    Compiling prometheus-utils v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dyn_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:57:34
[INFO] [stdout]    |
[INFO] [stdout] 57 |     resource_guards: Vec<Box<dyn Drop + Send>>,
[INFO] [stdout]    |                                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:45:55
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stdout]    |                                                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]   --> src/instrumented_future.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn with_guard<GuardFn: FnOnce() -> Option<Box<dyn Drop + Send>> + Send + 'static>(
[INFO] [stdout]    |                                                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 10.47s
[INFO] running `Command { std: "docker" "inspect" "409d4626db6023956172f770631d58d60512f167bf7947f993d5ae6eaf96e3c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "409d4626db6023956172f770631d58d60512f167bf7947f993d5ae6eaf96e3c2", kill_on_drop: false }`
[INFO] [stdout] 409d4626db6023956172f770631d58d60512f167bf7947f993d5ae6eaf96e3c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] cdf422a8622c93e30bdd4eac730f0a662b1954ddedb74f95c354d22f3d56413b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cdf422a8622c93e30bdd4eac730f0a662b1954ddedb74f95c354d22f3d56413b", kill_on_drop: false }`
[INFO] [stderr] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stderr]   --> src/instrumented_future.rs:45:55
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stderr]    |                                                       ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dyn_drop)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stderr]   --> src/instrumented_future.rs:57:34
[INFO] [stderr]    |
[INFO] [stderr] 57 |     resource_guards: Vec<Box<dyn Drop + Send>>,
[INFO] [stderr]    |                                  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stderr]   --> src/instrumented_future.rs:45:55
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pre_polls: Vec<Box<dyn FnOnce() -> Option<Box<dyn Drop + Send>> + Send>>,
[INFO] [stderr]    |                                                       ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stderr]   --> src/instrumented_future.rs:84:59
[INFO] [stderr]    |
[INFO] [stderr] 84 |     pub fn with_guard<GuardFn: FnOnce() -> Option<Box<dyn Drop + Send>> + Send + 'static>(
[INFO] [stderr]    |                                                           ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `prometheus-utils` (lib) generated 4 warnings
[INFO] [stderr] warning: `prometheus-utils` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/prometheus_utils-bf85547ff83239b7)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test percentile::tests::test_wraps_are_reported ... ok
[INFO] [stdout] test percentile::tests::test_percentiles_are_reported ... ok
[INFO] [stdout] test percentile::tests::test_small_sampleset ... ok
[INFO] [stdout] test percentile::tests::test_overflow_wraps_writes ... ok
[INFO] [stdout] test instrumented_future::counters_increment_only_when_futures_run ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests prometheus-utils
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - label_enum (line 84) ... ignored
[INFO] [stdout] test src/lib.rs - label_enum (line 97) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cdf422a8622c93e30bdd4eac730f0a662b1954ddedb74f95c354d22f3d56413b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdf422a8622c93e30bdd4eac730f0a662b1954ddedb74f95c354d22f3d56413b", kill_on_drop: false }`
[INFO] [stdout] cdf422a8622c93e30bdd4eac730f0a662b1954ddedb74f95c354d22f3d56413b