[INFO] cloning repository https://github.com/museun/twitchchat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/museun/twitchchat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Ftwitchchat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Ftwitchchat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d41348ad3b9c7fe7dba489e805f31afec57957f
[INFO] checking museun/twitchchat against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Ftwitchchat" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/museun/twitchchat on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/museun/twitchchat
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/museun/twitchchat
[INFO] tweaked toml for git repo https://github.com/museun/twitchchat written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "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" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--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-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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a037650c1c457800784349501cb5de87ed8ebff19f2ebd00c6f1b003022e915
[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" "9a037650c1c457800784349501cb5de87ed8ebff19f2ebd00c6f1b003022e915", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a037650c1c457800784349501cb5de87ed8ebff19f2ebd00c6f1b003022e915", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a037650c1c457800784349501cb5de87ed8ebff19f2ebd00c6f1b003022e915", kill_on_drop: false }`
[INFO] [stdout] 9a037650c1c457800784349501cb5de87ed8ebff19f2ebd00c6f1b003022e915
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5287d76bf0e4455c64d5abd19f8e9d5859ffa1117a3872c456593fbbcc1701e
[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" "c5287d76bf0e4455c64d5abd19f8e9d5859ffa1117a3872c456593fbbcc1701e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking futures-core v0.3.12
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking pin-project-lite v0.2.4
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking twitchchat v0.14.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking rmp v0.8.9
[INFO] [stderr]     Checking rmp-serde v0.14.4
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.28s
[INFO] running `Command { std: "docker" "inspect" "c5287d76bf0e4455c64d5abd19f8e9d5859ffa1117a3872c456593fbbcc1701e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5287d76bf0e4455c64d5abd19f8e9d5859ffa1117a3872c456593fbbcc1701e", kill_on_drop: false }`
[INFO] [stdout] c5287d76bf0e4455c64d5abd19f8e9d5859ffa1117a3872c456593fbbcc1701e