[INFO] fetching crate sweeper 1.0.0-rc3...
[INFO] testing sweeper-1.0.0-rc3 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate sweeper 1.0.0-rc3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate sweeper 1.0.0-rc3 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 sweeper 1.0.0-rc3
[INFO] finished tweaking crates.io crate sweeper 1.0.0-rc3
[INFO] tweaked toml for crates.io crate sweeper 1.0.0-rc3 written to /workspace/builds/worker-7/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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", 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] f96a2b087444da937c2138d6c0cc2174ec882983965a8215b510bf1d26e7adc6
[INFO] running `Command { std: "docker" "start" "-a" "f96a2b087444da937c2138d6c0cc2174ec882983965a8215b510bf1d26e7adc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f96a2b087444da937c2138d6c0cc2174ec882983965a8215b510bf1d26e7adc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f96a2b087444da937c2138d6c0cc2174ec882983965a8215b510bf1d26e7adc6", kill_on_drop: false }`
[INFO] [stdout] f96a2b087444da937c2138d6c0cc2174ec882983965a8215b510bf1d26e7adc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 013a9a02bc8693b4a2af994e8cf35a56428b6d8b2aed699b7289042f2621b78a
[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" "013a9a02bc8693b4a2af994e8cf35a56428b6d8b2aed699b7289042f2621b78a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling sweeper v1.0.0-rc3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.80s
[INFO] running `Command { std: "docker" "inspect" "013a9a02bc8693b4a2af994e8cf35a56428b6d8b2aed699b7289042f2621b78a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "013a9a02bc8693b4a2af994e8cf35a56428b6d8b2aed699b7289042f2621b78a", kill_on_drop: false }`
[INFO] [stdout] 013a9a02bc8693b4a2af994e8cf35a56428b6d8b2aed699b7289042f2621b78a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1849dc5abcf54cef76e42d649ab6edd087cbd33638eca463811ba8f627e74ce8
[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" "1849dc5abcf54cef76e42d649ab6edd087cbd33638eca463811ba8f627e74ce8", kill_on_drop: false }`
[INFO] [stderr]    Compiling sweeper v1.0.0-rc3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "1849dc5abcf54cef76e42d649ab6edd087cbd33638eca463811ba8f627e74ce8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1849dc5abcf54cef76e42d649ab6edd087cbd33638eca463811ba8f627e74ce8", kill_on_drop: false }`
[INFO] [stdout] 1849dc5abcf54cef76e42d649ab6edd087cbd33638eca463811ba8f627e74ce8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 86c66960d984091a225c9516bdd5f1e7aa66bdc244be67a85a063d15c02da1b5
[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" "86c66960d984091a225c9516bdd5f1e7aa66bdc244be67a85a063d15c02da1b5", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/sweeper-241b16e8cb3763d4
[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] [stderr]    Doc-tests sweeper
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/iter.rs - iter::ColumnIter (line 132) ... ok
[INFO] [stdout] test src/iter.rs - iter::FieldColumnsIter (line 296) ... ok
[INFO] [stdout] test src/iter.rs - iter::RowIter (line 28) ... ok
[INFO] [stdout] test src/iter.rs - iter::FieldRowsIter (line 230) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.29s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "86c66960d984091a225c9516bdd5f1e7aa66bdc244be67a85a063d15c02da1b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86c66960d984091a225c9516bdd5f1e7aa66bdc244be67a85a063d15c02da1b5", kill_on_drop: false }`
[INFO] [stdout] 86c66960d984091a225c9516bdd5f1e7aa66bdc244be67a85a063d15c02da1b5