[INFO] fetching crate at-collection 0.3.0...
[INFO] testing at-collection-0.3.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate at-collection 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate at-collection 0.3.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate at-collection 0.3.0
[INFO] finished tweaking crates.io crate at-collection 0.3.0
[INFO] tweaked toml for crates.io crate at-collection 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 262405556b20d1bf0dd764e755939cf4c7f2f44347382ec5bda1d2a23d140060
[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" "262405556b20d1bf0dd764e755939cf4c7f2f44347382ec5bda1d2a23d140060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "262405556b20d1bf0dd764e755939cf4c7f2f44347382ec5bda1d2a23d140060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "262405556b20d1bf0dd764e755939cf4c7f2f44347382ec5bda1d2a23d140060", kill_on_drop: false }`
[INFO] [stdout] 262405556b20d1bf0dd764e755939cf4c7f2f44347382ec5bda1d2a23d140060
[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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f68fca502405d66f90155c72f6056602e5905232de6fbb924c7702fc8e3323ab
[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" "f68fca502405d66f90155c72f6056602e5905232de6fbb924c7702fc8e3323ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling at-collection v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.56s
[INFO] running `Command { std: "docker" "inspect" "f68fca502405d66f90155c72f6056602e5905232de6fbb924c7702fc8e3323ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f68fca502405d66f90155c72f6056602e5905232de6fbb924c7702fc8e3323ab", kill_on_drop: false }`
[INFO] [stdout] f68fca502405d66f90155c72f6056602e5905232de6fbb924c7702fc8e3323ab
[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" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3c0a9b8d5fdb9ef04ace91aff8632ddbe907dbaab4485616d6c904c08da7012
[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" "c3c0a9b8d5fdb9ef04ace91aff8632ddbe907dbaab4485616d6c904c08da7012", kill_on_drop: false }`
[INFO] [stderr]    Compiling at-collection v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.05s
[INFO] running `Command { std: "docker" "inspect" "c3c0a9b8d5fdb9ef04ace91aff8632ddbe907dbaab4485616d6c904c08da7012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3c0a9b8d5fdb9ef04ace91aff8632ddbe907dbaab4485616d6c904c08da7012", kill_on_drop: false }`
[INFO] [stdout] c3c0a9b8d5fdb9ef04ace91aff8632ddbe907dbaab4485616d6c904c08da7012
[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" "+1.49.0" "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] 3db92f7fdcb08968cca8656857aa6b727ab919a351147fcd57c4ed3dcc648e50
[INFO] running `Command { std: "docker" "start" "-a" "3db92f7fdcb08968cca8656857aa6b727ab919a351147fcd57c4ed3dcc648e50", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/at_collection-3fc35eb0c691714b
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test tests::into_iter ... ok
[INFO] [stdout] test tests::for_iter ... ok
[INFO] [stdout] test tests::at_least_two_macro ... ok
[INFO] [stdout] test tests::at_least_two_expr ... ok
[INFO] [stdout] test tests::length ... ok
[INFO] [stdout] test tests::to_one ... ok
[INFO] [stdout] test tests::try_from ... ok
[INFO] [stdout] test tests::iter ... ok
[INFO] [stdout] test tests::at_least_one_macro ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests at-collection
[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 `Command { std: "docker" "inspect" "3db92f7fdcb08968cca8656857aa6b727ab919a351147fcd57c4ed3dcc648e50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3db92f7fdcb08968cca8656857aa6b727ab919a351147fcd57c4ed3dcc648e50", kill_on_drop: false }`
[INFO] [stdout] 3db92f7fdcb08968cca8656857aa6b727ab919a351147fcd57c4ed3dcc648e50