[INFO] cloning repository https://github.com/steveslatky/RustAsyncServer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steveslatky/RustAsyncServer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveslatky%2FRustAsyncServer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveslatky%2FRustAsyncServer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a3e45a04f299d6e6955e0d29d0c1e8a1a2908ff
[INFO] checking steveslatky/RustAsyncServer against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveslatky%2FRustAsyncServer" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  92% (752/816)   
Checking out files:  93% (759/816)   
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Checking out files:  95% (776/816)   
Checking out files:  96% (784/816)   
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Checking out files: 100% (816/816)   
Checking out files: 100% (816/816), done.
[INFO] validating manifest of git repo https://github.com/steveslatky/RustAsyncServer on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/steveslatky/RustAsyncServer
[INFO] finished tweaking git repo https://github.com/steveslatky/RustAsyncServer
[INFO] tweaked toml for git repo https://github.com/steveslatky/RustAsyncServer written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/steveslatky/RustAsyncServer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", 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] 59375d6654fdc36a9cf2d9c32cdd66b690bc40c84755467a7027b54774de3901
[INFO] running `Command { std: "docker" "start" "-a" "59375d6654fdc36a9cf2d9c32cdd66b690bc40c84755467a7027b54774de3901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59375d6654fdc36a9cf2d9c32cdd66b690bc40c84755467a7027b54774de3901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59375d6654fdc36a9cf2d9c32cdd66b690bc40c84755467a7027b54774de3901", kill_on_drop: false }`
[INFO] [stdout] 59375d6654fdc36a9cf2d9c32cdd66b690bc40c84755467a7027b54774de3901
[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" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e772aee7014b96a831e113eacaf7a50e34fef77a0b9dd096f7363e45247acf07
[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" "e772aee7014b96a831e113eacaf7a50e34fef77a0b9dd096f7363e45247acf07", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking lazycell v0.5.1
[INFO] [stderr]     Checking smallvec v0.2.1
[INFO] [stderr]     Checking take v0.1.0
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking tokio-io v0.1.3
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking mio v0.6.10
[INFO] [stderr]     Checking tokio-core v0.1.9
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking RustAsyncServer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: crate `RustAsyncServer` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_async_server`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustAsyncServer` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_async_server`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.22s
[INFO] running `Command { std: "docker" "inspect" "e772aee7014b96a831e113eacaf7a50e34fef77a0b9dd096f7363e45247acf07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e772aee7014b96a831e113eacaf7a50e34fef77a0b9dd096f7363e45247acf07", kill_on_drop: false }`
[INFO] [stdout] e772aee7014b96a831e113eacaf7a50e34fef77a0b9dd096f7363e45247acf07