[INFO] fetching crate slackbot 0.2.0...
[INFO] checking slackbot-0.2.0 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate slackbot 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate slackbot 0.2.0 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slackbot 0.2.0
[INFO] finished tweaking crates.io crate slackbot 0.2.0
[INFO] tweaked toml for crates.io crate slackbot 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded language-tags v0.0.7
[INFO] [stderr]   Downloaded hyper v0.6.16
[INFO] [stderr]   Downloaded serde_json v0.6.1
[INFO] [stderr]   Downloaded websocket v0.12.2
[INFO] [stderr]   Downloaded cookie v0.1.21
[INFO] [stderr]   Downloaded slack v0.8.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c2d4e0a2251e59fd6406695f38db793439cfa7644415510274f8570193eee68
[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" "8c2d4e0a2251e59fd6406695f38db793439cfa7644415510274f8570193eee68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c2d4e0a2251e59fd6406695f38db793439cfa7644415510274f8570193eee68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c2d4e0a2251e59fd6406695f38db793439cfa7644415510274f8570193eee68", kill_on_drop: false }`
[INFO] [stdout] 8c2d4e0a2251e59fd6406695f38db793439cfa7644415510274f8570193eee68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--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] 7df2ff7f06c8eba77cd82b17d0d182b49a56a8d3b7e274d4b4be2a5de48c6e5f
[INFO] running `Command { std: "docker" "start" "-a" "7df2ff7f06c8eba77cd82b17d0d182b49a56a8d3b7e274d4b4be2a5de48c6e5f", kill_on_drop: false }`
[INFO] [stderr] error: multiple packages link to native library `openssl`, but a native library can be linked only once
[INFO] [stderr] 
[INFO] [stderr] package `openssl-sys v0.6.7`
[INFO] [stderr]     ... which is depended on by `openssl v0.6.7`
[INFO] [stderr]     ... which is depended on by `cookie v0.1.21`
[INFO] [stderr]     ... which is depended on by `hyper v0.6.16`
[INFO] [stderr]     ... which is depended on by `slack v0.8.3`
[INFO] [stderr]     ... which is depended on by `slackbot v0.2.0 (/opt/rustwide/workdir)`
[INFO] [stderr] links to native library `openssl`
[INFO] [stderr] 
[INFO] [stderr] package `openssl-sys v0.9.59`
[INFO] [stderr]     ... which is depended on by `openssl v0.10.31`
[INFO] [stderr]     ... which is depended on by `websocket v0.12.2`
[INFO] [stderr]     ... which is depended on by `slack v0.8.3`
[INFO] [stderr]     ... which is depended on by `slackbot v0.2.0 (/opt/rustwide/workdir)`
[INFO] [stderr] also links to native library `openssl`
[INFO] running `Command { std: "docker" "inspect" "7df2ff7f06c8eba77cd82b17d0d182b49a56a8d3b7e274d4b4be2a5de48c6e5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7df2ff7f06c8eba77cd82b17d0d182b49a56a8d3b7e274d4b4be2a5de48c6e5f", kill_on_drop: false }`
[INFO] [stdout] 7df2ff7f06c8eba77cd82b17d0d182b49a56a8d3b7e274d4b4be2a5de48c6e5f