[INFO] cloning repository https://github.com/flopacero/surf-helloworld
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/flopacero/surf-helloworld" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflopacero%2Fsurf-helloworld", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflopacero%2Fsurf-helloworld'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d2219863d5e61bcb38d0525c441928fdb911a2e0
[INFO] documenting flopacero/surf-helloworld against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflopacero%2Fsurf-helloworld" "/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/flopacero/surf-helloworld on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/flopacero/surf-helloworld
[INFO] finished tweaking git repo https://github.com/flopacero/surf-helloworld
[INFO] tweaked toml for git repo https://github.com/flopacero/surf-helloworld written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/flopacero/surf-helloworld already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dcc0d51284918ba8ea7575472ddda81b467c9d1e65ca912b7a84b9c8c23e6b41
[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" "dcc0d51284918ba8ea7575472ddda81b467c9d1e65ca912b7a84b9c8c23e6b41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcc0d51284918ba8ea7575472ddda81b467c9d1e65ca912b7a84b9c8c23e6b41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcc0d51284918ba8ea7575472ddda81b467c9d1e65ca912b7a84b9c8c23e6b41", kill_on_drop: false }`
[INFO] [stdout] dcc0d51284918ba8ea7575472ddda81b467c9d1e65ca912b7a84b9c8c23e6b41
[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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eae72fe64db0c8699781ff203f3f64986c29905e027234ee4bc35bf0d7040026
[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" "eae72fe64db0c8699781ff203f3f64986c29905e027234ee4bc35bf0d7040026", 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] [stderr]    Compiling curl v0.4.24
[INFO] [stderr]    Compiling isahc v0.7.4
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.2
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.21
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking surf v1.0.2
[INFO] [stdout] error[E0277]: the trait bound `std::io::Empty: futures::AsyncRead` is not satisfied
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/surf-1.0.2/src/http_client/mod.rs:64:21
[INFO] [stdout]    |
[INFO] [stdout] 64 |             reader: Box::new(std::io::empty()),
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `futures::AsyncRead` is not implemented for `std::io::Empty`
[INFO] [stdout]    |
[INFO] [stdout]    = note: required for the cast to the object type `dyn futures::AsyncRead + std::marker::Send + std::marker::Unpin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `surf`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "eae72fe64db0c8699781ff203f3f64986c29905e027234ee4bc35bf0d7040026", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eae72fe64db0c8699781ff203f3f64986c29905e027234ee4bc35bf0d7040026", kill_on_drop: false }`
[INFO] [stdout] eae72fe64db0c8699781ff203f3f64986c29905e027234ee4bc35bf0d7040026