[INFO] fetching crate twang 0.8.0...
[INFO] testing twang-0.8.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate twang 0.8.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate twang 0.8.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate twang 0.8.0
[INFO] finished tweaking crates.io crate twang 0.8.0
[INFO] tweaked toml for crates.io crate twang 0.8.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate twang 0.8.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fon v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bfdfc066e8ac67dbd7743f470b381412340eb9099a14e6c8ab890ba9fd6c2ba5
[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" "bfdfc066e8ac67dbd7743f470b381412340eb9099a14e6c8ab890ba9fd6c2ba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfdfc066e8ac67dbd7743f470b381412340eb9099a14e6c8ab890ba9fd6c2ba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfdfc066e8ac67dbd7743f470b381412340eb9099a14e6c8ab890ba9fd6c2ba5", kill_on_drop: false }`
[INFO] [stdout] bfdfc066e8ac67dbd7743f470b381412340eb9099a14e6c8ab890ba9fd6c2ba5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40b9cc5cca0fc92f90fb88deb20e524c8cc32ee07b057ad5bb9f89dc062257ea
[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" "40b9cc5cca0fc92f90fb88deb20e524c8cc32ee07b057ad5bb9f89dc062257ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling twang v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling fon v0.6.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `Command { std: "docker" "inspect" "40b9cc5cca0fc92f90fb88deb20e524c8cc32ee07b057ad5bb9f89dc062257ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40b9cc5cca0fc92f90fb88deb20e524c8cc32ee07b057ad5bb9f89dc062257ea", kill_on_drop: false }`
[INFO] [stdout] 40b9cc5cca0fc92f90fb88deb20e524c8cc32ee07b057ad5bb9f89dc062257ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aaf4872bbb089e95f8bccb698b68c848403791cf60d6bae2e833b999da87dd59
[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" "aaf4872bbb089e95f8bccb698b68c848403791cf60d6bae2e833b999da87dd59", kill_on_drop: false }`
[INFO] [stderr]    Compiling twang v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "aaf4872bbb089e95f8bccb698b68c848403791cf60d6bae2e833b999da87dd59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aaf4872bbb089e95f8bccb698b68c848403791cf60d6bae2e833b999da87dd59", kill_on_drop: false }`
[INFO] [stdout] aaf4872bbb089e95f8bccb698b68c848403791cf60d6bae2e833b999da87dd59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 69f918e41539043894a3ad5ff5fcdc9cd91946d4ddf4c23e2927a3586bd7456f
[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" "69f918e41539043894a3ad5ff5fcdc9cd91946d4ddf4c23e2927a3586bd7456f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/twang-1cff2abc14bd35b7)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test math::tests::math_signum ... ok
[INFO] [stdout] test math::tests::math_exp ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests twang
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 30) - compile ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.12s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "69f918e41539043894a3ad5ff5fcdc9cd91946d4ddf4c23e2927a3586bd7456f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69f918e41539043894a3ad5ff5fcdc9cd91946d4ddf4c23e2927a3586bd7456f", kill_on_drop: false }`
[INFO] [stdout] 69f918e41539043894a3ad5ff5fcdc9cd91946d4ddf4c23e2927a3586bd7456f