[INFO] fetching crate slack_api 0.23.1...
[INFO] testing slack_api-0.23.1 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate slack_api 0.23.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate slack_api 0.23.1 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 slack_api 0.23.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate slack_api 0.23.1
[INFO] tweaked toml for crates.io crate slack_api 0.23.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate slack_api 0.23.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stdout] 1f1fc28b454f995e8c6deee09b4cb1c2b573e5d884c8c7081098b591d8ada94c
[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" "1f1fc28b454f995e8c6deee09b4cb1c2b573e5d884c8c7081098b591d8ada94c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f1fc28b454f995e8c6deee09b4cb1c2b573e5d884c8c7081098b591d8ada94c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f1fc28b454f995e8c6deee09b4cb1c2b573e5d884c8c7081098b591d8ada94c", kill_on_drop: false }`
[INFO] [stdout] 1f1fc28b454f995e8c6deee09b4cb1c2b573e5d884c8c7081098b591d8ada94c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 256b2611a9f583d8ecb1d170e3b7c906d3efef62dd2e3e10783a4fb6ecef44da
[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" "256b2611a9f583d8ecb1d170e3b7c906d3efef62dd2e3e10783a4fb6ecef44da", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling cc v1.0.56
[INFO] [stderr]    Compiling net2 v0.2.34
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling async-compression v0.3.5
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling async-trait v0.1.36
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling tokio v0.2.21
[INFO] [stderr]    Compiling pin-project v0.4.22
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tls v0.3.1
[INFO] [stderr]    Compiling h2 v0.2.5
[INFO] [stderr]    Compiling hyper v0.13.6
[INFO] [stderr]    Compiling hyper-tls v0.4.1
[INFO] [stderr]    Compiling reqwest v0.10.6
[INFO] [stderr]    Compiling slack_api v0.23.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 34s
[INFO] running `Command { std: "docker" "inspect" "256b2611a9f583d8ecb1d170e3b7c906d3efef62dd2e3e10783a4fb6ecef44da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "256b2611a9f583d8ecb1d170e3b7c906d3efef62dd2e3e10783a4fb6ecef44da", kill_on_drop: false }`
[INFO] [stdout] 256b2611a9f583d8ecb1d170e3b7c906d3efef62dd2e3e10783a4fb6ecef44da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 8e6cb2ce879d9a481bd9ec678922e87346f9ffa4acd5310c16f08b875006ce71
[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" "8e6cb2ce879d9a481bd9ec678922e87346f9ffa4acd5310c16f08b875006ce71", kill_on_drop: false }`
[INFO] [stderr]    Compiling slack_api v0.23.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `slack_api`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name start_rtm --edition=2018 examples/start_rtm.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="async"' --cfg 'feature="async-trait"' --cfg 'feature="default"' --cfg 'feature="reqwest"' --cfg 'feature="reqwest_"' --cfg 'feature="with_native_tls"' -C metadata=916eebfe29b5e808 -C extra-filename=-916eebfe29b5e808 --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-f6470e77ed9bcbbe.so --extern reqwest_=/opt/rustwide/target/debug/deps/libreqwest-4f94f9b8fdecbd0a.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-1c540d3ba6bd4edb.rlib --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-96ddad424df283c4.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-e59540a2f0a33f2c.rlib --extern slack_api=/opt/rustwide/target/debug/deps/libslack_api-260db00bf2c1fa76.rlib --extern tokio=/opt/rustwide/target/debug/deps/libtokio-e4f86f9f030a81cd.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8e6cb2ce879d9a481bd9ec678922e87346f9ffa4acd5310c16f08b875006ce71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e6cb2ce879d9a481bd9ec678922e87346f9ffa4acd5310c16f08b875006ce71", kill_on_drop: false }`
[INFO] [stdout] 8e6cb2ce879d9a481bd9ec678922e87346f9ffa4acd5310c16f08b875006ce71