[INFO] crate metrics-recorder-prometheus 0.2.3 is already in cache
[INFO] extracting crate metrics-recorder-prometheus 0.2.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/metrics-recorder-prometheus/0.2.3
[INFO] extracting crate metrics-recorder-prometheus 0.2.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/metrics-recorder-prometheus/0.2.3
[INFO] validating manifest of metrics-recorder-prometheus-0.2.3 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of metrics-recorder-prometheus-0.2.3 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing metrics-recorder-prometheus-0.2.3
[INFO] finished frobbing metrics-recorder-prometheus-0.2.3
[INFO] frobbed toml for metrics-recorder-prometheus-0.2.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/metrics-recorder-prometheus/0.2.3/Cargo.toml
[INFO] started frobbing metrics-recorder-prometheus-0.2.3
[INFO] finished frobbing metrics-recorder-prometheus-0.2.3
[INFO] frobbed toml for metrics-recorder-prometheus-0.2.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/metrics-recorder-prometheus/0.2.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing metrics-recorder-prometheus-0.2.3 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/metrics-recorder-prometheus/0.2.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 1e54ec126c590d6664102fb378292ac34232cb8f045f8520bee2ba1ea0ecc785
[INFO] running `"docker" "start" "-a" "1e54ec126c590d6664102fb378292ac34232cb8f045f8520bee2ba1ea0ecc785"`
[INFO] [stderr]    Compiling metrics-core v0.4.0
[INFO] [stderr]    Compiling hdrhistogram v6.3.4
[INFO] [stderr]    Compiling metrics-util v0.2.1
[INFO] [stderr]    Compiling metrics-recorder-prometheus v0.2.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `"docker" "inspect" "1e54ec126c590d6664102fb378292ac34232cb8f045f8520bee2ba1ea0ecc785"`
[INFO] running `"docker" "rm" "-f" "1e54ec126c590d6664102fb378292ac34232cb8f045f8520bee2ba1ea0ecc785"`
[INFO] [stdout] 1e54ec126c590d6664102fb378292ac34232cb8f045f8520bee2ba1ea0ecc785
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/metrics-recorder-prometheus/0.2.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 82975e4d155a77595f0307bfdf33685f2518593fe29b44f702eb808c6fc3121b
[INFO] running `"docker" "start" "-a" "82975e4d155a77595f0307bfdf33685f2518593fe29b44f702eb808c6fc3121b"`
[INFO] [stderr]    Compiling metrics-recorder-prometheus v0.2.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "82975e4d155a77595f0307bfdf33685f2518593fe29b44f702eb808c6fc3121b"`
[INFO] running `"docker" "rm" "-f" "82975e4d155a77595f0307bfdf33685f2518593fe29b44f702eb808c6fc3121b"`
[INFO] [stdout] 82975e4d155a77595f0307bfdf33685f2518593fe29b44f702eb808c6fc3121b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/metrics-recorder-prometheus/0.2.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 26e2d5bdc8d3aa89149a4518166303659f35f3f0c0eb25dc32aeef0fecf06181
[INFO] running `"docker" "start" "-a" "26e2d5bdc8d3aa89149a4518166303659f35f3f0c0eb25dc32aeef0fecf06181"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/metrics_recorder_prometheus-4fa3d8d926c7aba2
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests metrics-recorder-prometheus
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "26e2d5bdc8d3aa89149a4518166303659f35f3f0c0eb25dc32aeef0fecf06181"`
[INFO] running `"docker" "rm" "-f" "26e2d5bdc8d3aa89149a4518166303659f35f3f0c0eb25dc32aeef0fecf06181"`
[INFO] [stdout] 26e2d5bdc8d3aa89149a4518166303659f35f3f0c0eb25dc32aeef0fecf06181