[INFO] cloning repository https://github.com/Kroisse/futures-compat-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kroisse/futures-compat-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKroisse%2Ffutures-compat-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKroisse%2Ffutures-compat-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c7406efdbc924eea9be8e9df359410a0a006961e
[INFO] documenting Kroisse/futures-compat-example against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKroisse%2Ffutures-compat-example" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Kroisse/futures-compat-example on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Kroisse/futures-compat-example
[INFO] finished tweaking git repo https://github.com/Kroisse/futures-compat-example
[INFO] tweaked toml for git repo https://github.com/Kroisse/futures-compat-example written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Kroisse/futures-compat-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-reactor v0.1.3
[INFO] [stderr]   Downloaded hyper v0.12.8
[INFO] [stderr]   Downloaded cc v1.0.20
[INFO] [stderr]   Downloaded http v0.1.10
[INFO] [stderr]   Downloaded futures-io-preview v0.3.0-alpha.3
[INFO] [stderr]   Downloaded h2 v0.1.12
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.3
[INFO] [stderr]   Downloaded tokio-timer v0.2.5
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.3
[INFO] [stderr]   Downloaded tokio-executor v0.1.3
[INFO] [stderr]   Downloaded byteorder v1.2.4
[INFO] [stderr]   Downloaded pin-utils v0.1.0-alpha.1
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.3
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.3
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.3
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2020-08-29" "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] 106dfd88d43b5df12af93ff4776ddbb3b1b26c108c391a02373bb4235332ce90
[INFO] running `Command { std: "docker" "start" "-a" "106dfd88d43b5df12af93ff4776ddbb3b1b26c108c391a02373bb4235332ce90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "106dfd88d43b5df12af93ff4776ddbb3b1b26c108c391a02373bb4235332ce90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "106dfd88d43b5df12af93ff4776ddbb3b1b26c108c391a02373bb4235332ce90", kill_on_drop: false }`
[INFO] [stdout] 106dfd88d43b5df12af93ff4776ddbb3b1b26c108c391a02373bb4235332ce90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 993647ea45c2aa430107cc5ed6eae0ec770819a474f02af012826a7a49b13c25
[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" "993647ea45c2aa430107cc5ed6eae0ec770819a474f02af012826a7a49b13c25", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling cc v1.0.20
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.1
[INFO] [stderr]     Checking tokio-executor v0.1.3
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pin-utils-0.1.0-alpha.1/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(pin)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pin-utils`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "993647ea45c2aa430107cc5ed6eae0ec770819a474f02af012826a7a49b13c25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "993647ea45c2aa430107cc5ed6eae0ec770819a474f02af012826a7a49b13c25", kill_on_drop: false }`
[INFO] [stdout] 993647ea45c2aa430107cc5ed6eae0ec770819a474f02af012826a7a49b13c25