[INFO] cloning repository https://github.com/hustshawn/rust-tokio-echo-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hustshawn/rust-tokio-echo-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhustshawn%2Frust-tokio-echo-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhustshawn%2Frust-tokio-echo-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7241b2d5b09828e6179aece12ec8dc510a4b7522
[INFO] checking hustshawn/rust-tokio-echo-server against try#05c8870159e4f328578a970e125aa76d24f03b56 for pr-76219
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhustshawn%2Frust-tokio-echo-server" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hustshawn/rust-tokio-echo-server on toolchain 05c8870159e4f328578a970e125aa76d24f03b56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hustshawn/rust-tokio-echo-server
[INFO] finished tweaking git repo https://github.com/hustshawn/rust-tokio-echo-server
[INFO] tweaked toml for git repo https://github.com/hustshawn/rust-tokio-echo-server written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/hustshawn/rust-tokio-echo-server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2fa8a58b4dc55e29679d85fbbd761453f3c7d59aa73c40215851a2581907289
[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" "a2fa8a58b4dc55e29679d85fbbd761453f3c7d59aa73c40215851a2581907289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2fa8a58b4dc55e29679d85fbbd761453f3c7d59aa73c40215851a2581907289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2fa8a58b4dc55e29679d85fbbd761453f3c7d59aa73c40215851a2581907289", kill_on_drop: false }`
[INFO] [stdout] a2fa8a58b4dc55e29679d85fbbd761453f3c7d59aa73c40215851a2581907289
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0902aa728d5a321e0d8c4451ff987922718564db9d5fd5b40921bda60bb8964a
[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" "0902aa728d5a321e0d8c4451ff987922718564db9d5fd5b40921bda60bb8964a", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]     Checking lazycell v0.5.1
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking net2 v0.2.30
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking bytes v0.4.4
[INFO] [stderr]     Checking mio v0.6.10
[INFO] [stderr]     Checking tokio-io v0.1.2
[INFO] [stderr]     Checking tokio-core v0.1.9
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking echo-proto v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.84s
[INFO] running `Command { std: "docker" "inspect" "0902aa728d5a321e0d8c4451ff987922718564db9d5fd5b40921bda60bb8964a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0902aa728d5a321e0d8c4451ff987922718564db9d5fd5b40921bda60bb8964a", kill_on_drop: false }`
[INFO] [stdout] 0902aa728d5a321e0d8c4451ff987922718564db9d5fd5b40921bda60bb8964a