[INFO] fetching crate slackbot 0.2.0...
[INFO] checking slackbot-0.2.0 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate slackbot 0.2.0 into /workspace/builds/worker-51/source
[INFO] validating manifest of crates.io crate slackbot 0.2.0 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-51/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4cb33b52c2b377e8ad531652c0dff63bd7544ef0a2f3abb972d9f79677f30482
[INFO] running `Command { std: "docker" "start" "-a" "4cb33b52c2b377e8ad531652c0dff63bd7544ef0a2f3abb972d9f79677f30482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cb33b52c2b377e8ad531652c0dff63bd7544ef0a2f3abb972d9f79677f30482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cb33b52c2b377e8ad531652c0dff63bd7544ef0a2f3abb972d9f79677f30482", kill_on_drop: false }`
[INFO] [stdout] 4cb33b52c2b377e8ad531652c0dff63bd7544ef0a2f3abb972d9f79677f30482
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52b7a98dd9d9911839e306a6e050b1c9e9b5e8d372791d2fde46a6c83043263a
[INFO] running `Command { std: "docker" "start" "-a" "52b7a98dd9d9911839e306a6e050b1c9e9b5e8d372791d2fde46a6c83043263a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 satisfies dependency `openssl-sys = "=0.6.7"` of package `openssl v0.6.7`
[INFO] [stderr]     ... which satisfies dependency `openssl = "=0.6.7"` of package `cookie v0.1.21`
[INFO] [stderr]     ... which satisfies dependency `cookie = "=0.1.21"` of package `hyper v0.6.16`
[INFO] [stderr]     ... which satisfies dependency `hyper = "=0.6.16"` of package `slack v0.8.3`
[INFO] [stderr]     ... which satisfies dependency `slack = "=0.8.3"` of package `slackbot v0.2.0 (/opt/rustwide/workdir)`
[INFO] [stderr] links to native library `openssl`
[INFO] [stderr] 
[INFO] [stderr] package `openssl-sys v0.9.66`
[INFO] [stderr]     ... which satisfies dependency `ffi = "=0.9.66"` of package `openssl v0.10.36`
[INFO] [stderr]     ... which satisfies dependency `openssl = "=0.10.36"` of package `websocket v0.12.2`
[INFO] [stderr]     ... which satisfies dependency `websocket = "=0.12.2"` of package `slack v0.8.3`
[INFO] [stderr]     ... which satisfies dependency `slack = "=0.8.3"` of package `slackbot v0.2.0 (/opt/rustwide/workdir)`
[INFO] [stderr] also links to native library `openssl`
[INFO] running `Command { std: "docker" "inspect" "52b7a98dd9d9911839e306a6e050b1c9e9b5e8d372791d2fde46a6c83043263a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52b7a98dd9d9911839e306a6e050b1c9e9b5e8d372791d2fde46a6c83043263a", kill_on_drop: false }`
[INFO] [stdout] 52b7a98dd9d9911839e306a6e050b1c9e9b5e8d372791d2fde46a6c83043263a