[INFO] fetching crate metrics-exporter-http-async_std 0.1.0...
[INFO] testing metrics-exporter-http-async_std-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate metrics-exporter-http-async_std 0.1.0 into /workspace/builds/worker-116/source
[INFO] validating manifest of crates.io crate metrics-exporter-http-async_std 0.1.0 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 metrics-exporter-http-async_std 0.1.0
[INFO] finished tweaking crates.io crate metrics-exporter-http-async_std 0.1.0
[INFO] tweaked toml for crates.io crate metrics-exporter-http-async_std 0.1.0 written to /workspace/builds/worker-116/source/Cargo.toml
[INFO] crate crates.io crate metrics-exporter-http-async_std 0.1.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.5
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[INFO] [stderr]   Downloaded metrics-runtime v0.13.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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] fb8fbe5ed12a32ec3ead2ccdffbd1b02c9ea78dc7c26000d43ae40f26010d946
[INFO] running `Command { std: "docker" "start" "-a" "fb8fbe5ed12a32ec3ead2ccdffbd1b02c9ea78dc7c26000d43ae40f26010d946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb8fbe5ed12a32ec3ead2ccdffbd1b02c9ea78dc7c26000d43ae40f26010d946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb8fbe5ed12a32ec3ead2ccdffbd1b02c9ea78dc7c26000d43ae40f26010d946", kill_on_drop: false }`
[INFO] [stdout] fb8fbe5ed12a32ec3ead2ccdffbd1b02c9ea78dc7c26000d43ae40f26010d946
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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] 6cb8dd3e964ea24767487c3d6d4e4fcfcd18c82a940f1444f0ed9e52659ae281
[INFO] running `Command { std: "docker" "start" "-a" "6cb8dd3e964ea24767487c3d6d4e4fcfcd18c82a940f1444f0ed9e52659ae281", kill_on_drop: false }`
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[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling metrics-core v0.5.2
[INFO] [stderr]    Compiling kv-log-macro v1.0.5
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[INFO] [stderr]    Compiling metrics-exporter-http-async_std v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.29s
[INFO] running `Command { std: "docker" "inspect" "6cb8dd3e964ea24767487c3d6d4e4fcfcd18c82a940f1444f0ed9e52659ae281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cb8dd3e964ea24767487c3d6d4e4fcfcd18c82a940f1444f0ed9e52659ae281", kill_on_drop: false }`
[INFO] [stdout] 6cb8dd3e964ea24767487c3d6d4e4fcfcd18c82a940f1444f0ed9e52659ae281
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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] fdd6e01d601711e3797230c014872fb9b6174517120c8de8270ab2f5da565824
[INFO] running `Command { std: "docker" "start" "-a" "fdd6e01d601711e3797230c014872fb9b6174517120c8de8270ab2f5da565824", kill_on_drop: false }`
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[INFO] [stderr]    Compiling pin-project-internal v0.4.16
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[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
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[INFO] [stderr]    Compiling hdrhistogram v6.3.4
[INFO] [stderr]    Compiling sized-chunks v0.1.3
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling pin-project v0.4.16
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling metrics-exporter-log v0.4.0
[INFO] [stderr]    Compiling metrics-util v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.53
[INFO] [stderr]    Compiling serde_yaml v0.8.12
[INFO] [stderr]    Compiling metrics-observer-prometheus v0.1.3
[INFO] [stderr]    Compiling h2 v0.2.5
[INFO] [stderr]    Compiling metrics-observer-yaml v0.1.1
[INFO] [stderr]    Compiling metrics-observer-json v0.1.1
[INFO] [stderr]    Compiling hyper v0.13.5
[INFO] [stderr]    Compiling metrics-exporter-http v0.3.0
[INFO] [stderr]    Compiling metrics-runtime v0.13.0
[INFO] [stderr]    Compiling metrics-exporter-http-async_std v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `metrics_exporter_async_std`
[INFO] [stdout]  --> examples/basic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use metrics_exporter_async_std::HttpExporter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `metrics_exporter_async_std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metrics-exporter-http-async_std` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fdd6e01d601711e3797230c014872fb9b6174517120c8de8270ab2f5da565824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdd6e01d601711e3797230c014872fb9b6174517120c8de8270ab2f5da565824", kill_on_drop: false }`
[INFO] [stdout] fdd6e01d601711e3797230c014872fb9b6174517120c8de8270ab2f5da565824