[INFO] cloning repository https://github.com/hjr3/future-mpsc-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hjr3/future-mpsc-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjr3%2Ffuture-mpsc-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjr3%2Ffuture-mpsc-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88217f15cff0e029900e5d8820b55a8c5d7e4666
[INFO] checking hjr3/future-mpsc-example against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhjr3%2Ffuture-mpsc-example" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hjr3/future-mpsc-example on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hjr3/future-mpsc-example
[INFO] finished tweaking git repo https://github.com/hjr3/future-mpsc-example
[INFO] tweaked toml for git repo https://github.com/hjr3/future-mpsc-example written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hjr3/future-mpsc-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mio v0.6.4
[INFO] [stderr]   Downloaded miow v0.2.0
[INFO] [stderr]   Downloaded env_logger v0.4.1
[INFO] [stderr]   Downloaded lazycell v0.4.0
[INFO] [stderr]   Downloaded futures v0.1.10
[INFO] [stderr]   Downloaded tokio-core v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d3c5fe18c9d9f165093354bfd5d0f3effa696be3da0b024afd49a4bde1363ab
[INFO] running `Command { std: "docker" "start" "-a" "8d3c5fe18c9d9f165093354bfd5d0f3effa696be3da0b024afd49a4bde1363ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d3c5fe18c9d9f165093354bfd5d0f3effa696be3da0b024afd49a4bde1363ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d3c5fe18c9d9f165093354bfd5d0f3effa696be3da0b024afd49a4bde1363ab", kill_on_drop: false }`
[INFO] [stdout] 8d3c5fe18c9d9f165093354bfd5d0f3effa696be3da0b024afd49a4bde1363ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20b58d4b307649587db947a34c652072450272329e29eab9de386a7a2cfc64c5
[INFO] running `Command { std: "docker" "start" "-a" "20b58d4b307649587db947a34c652072450272329e29eab9de386a7a2cfc64c5", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking lazycell v0.4.0
[INFO] [stderr]     Checking regex-syntax v0.4.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking futures v0.1.10
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking thread-id v3.0.0
[INFO] [stderr]     Checking net2 v0.2.26
[INFO] [stderr]     Checking thread_local v0.3.3
[INFO] [stderr]     Checking aho-corasick v0.6.2
[INFO] [stderr]     Checking mio v0.6.4
[INFO] [stderr]     Checking regex v0.2.1
[INFO] [stderr]     Checking tokio-core v0.1.4
[INFO] [stderr]     Checking env_logger v0.4.1
[INFO] [stderr]     Checking future-mpsc-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "20b58d4b307649587db947a34c652072450272329e29eab9de386a7a2cfc64c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20b58d4b307649587db947a34c652072450272329e29eab9de386a7a2cfc64c5", kill_on_drop: false }`
[INFO] [stdout] 20b58d4b307649587db947a34c652072450272329e29eab9de386a7a2cfc64c5