[INFO] fetching crate loopers-engine 0.1.0...
[INFO] testing loopers-engine-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate loopers-engine 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate loopers-engine 0.1.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate loopers-engine 0.1.0
[INFO] finished tweaking crates.io crate loopers-engine 0.1.0
[INFO] tweaked toml for crates.io crate loopers-engine 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b83020a0f6caf12532281827b97aadde1251d6f99a8b7627587c8d3fe6bc37c
[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" "2b83020a0f6caf12532281827b97aadde1251d6f99a8b7627587c8d3fe6bc37c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b83020a0f6caf12532281827b97aadde1251d6f99a8b7627587c8d3fe6bc37c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b83020a0f6caf12532281827b97aadde1251d6f99a8b7627587c8d3fe6bc37c", kill_on_drop: false }`
[INFO] [stdout] 2b83020a0f6caf12532281827b97aadde1251d6f99a8b7627587c8d3fe6bc37c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1971352b0cb97447362c6854eee259f6d1bd2e6a8cc13bda5bd0403751503196
[INFO] running `Command { std: "docker" "start" "-a" "1971352b0cb97447362c6854eee259f6d1bd2e6a8cc13bda5bd0403751503196", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling crossbeam-channel v0.4.4
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling csv v1.1.5
[INFO] [stderr]    Compiling loopers-common v0.1.0
[INFO] [stderr]    Compiling loopers-engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "1971352b0cb97447362c6854eee259f6d1bd2e6a8cc13bda5bd0403751503196", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1971352b0cb97447362c6854eee259f6d1bd2e6a8cc13bda5bd0403751503196", kill_on_drop: false }`
[INFO] [stdout] 1971352b0cb97447362c6854eee259f6d1bd2e6a8cc13bda5bd0403751503196
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b5b755ed5e8ea460822d672f6349495439040cc1d5b33e11edebc2845c9633fc
[INFO] running `Command { std: "docker" "start" "-a" "b5b755ed5e8ea460822d672f6349495439040cc1d5b33e11edebc2845c9633fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling half v1.6.0
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling plotters v0.2.15
[INFO] [stderr]    Compiling fern v0.6.0
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling tinytemplate v1.2.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling proptest v0.10.1
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling loopers-engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 43.21s
[INFO] running `Command { std: "docker" "inspect" "b5b755ed5e8ea460822d672f6349495439040cc1d5b33e11edebc2845c9633fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5b755ed5e8ea460822d672f6349495439040cc1d5b33e11edebc2845c9633fc", kill_on_drop: false }`
[INFO] [stdout] b5b755ed5e8ea460822d672f6349495439040cc1d5b33e11edebc2845c9633fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7826cae5be9763ac5b58e3bc0dfa80cf8e8c2022f11824f7a3b1b3e4c8f24a58
[INFO] running `Command { std: "docker" "start" "-a" "7826cae5be9763ac5b58e3bc0dfa80cf8e8c2022f11824f7a3b1b3e4c8f24a58", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.22s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/loopers_engine-8c0fef57f27979b0
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test metronome::tests::test_cycle ... ok
[INFO] [stdout] test sample::tests::test_from_mono ... ok
[INFO] [stdout] test sample::tests::test_xfade ... ok
[INFO] [stdout] test trigger::tests::test_measure_trigger ... ok
[INFO] [stdout] test sample::tests::test_new ... ok
[INFO] [stdout] test sample::tests::test_record ... ok
[INFO] [stdout] test trigger::tests::test_beat_trigger ... ok
[INFO] [stdout] test sample::tests::test_overdub ... ok
[INFO] [stdout] test looper::tests::test_transfer_buf ... ok
[INFO] [stdout] test looper::tests::test_overdub ... ok
[INFO] [stdout] test looper::tests::test_io ... ok
[INFO] [stdout] test looper::tests::test_non_harmonious_lengths ... ok
[INFO] [stdout] test looper::tests::test_transitions ... ok
[INFO] [stdout] test looper::tests::test_new ... ok
[INFO] [stdout] test looper::tests::test_serialization ... ok
[INFO] [stdout] test looper::tests::test_pre_xfade ... ok
[INFO] [stdout] test looper::tests::test_post_xfade ... ok
[INFO] [stdout] test trigger::tests::test_measure_trigger_prop ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.38s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests loopers-engine
[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" "7826cae5be9763ac5b58e3bc0dfa80cf8e8c2022f11824f7a3b1b3e4c8f24a58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7826cae5be9763ac5b58e3bc0dfa80cf8e8c2022f11824f7a3b1b3e4c8f24a58", kill_on_drop: false }`
[INFO] [stdout] 7826cae5be9763ac5b58e3bc0dfa80cf8e8c2022f11824f7a3b1b3e4c8f24a58