[INFO] cloning repository https://github.com/heim-rs/heim-node-exporter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/heim-rs/heim-node-exporter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheim-rs%2Fheim-node-exporter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheim-rs%2Fheim-node-exporter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3b8b26289388069520219d846dd6730b96db38b
[INFO] testing heim-rs/heim-node-exporter against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheim-rs%2Fheim-node-exporter" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/heim-rs/heim-node-exporter on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/heim-rs/heim-node-exporter
[INFO] finished tweaking git repo https://github.com/heim-rs/heim-node-exporter
[INFO] tweaked toml for git repo https://github.com/heim-rs/heim-node-exporter written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/heim-rs/heim-node-exporter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca147f4ab70e6889d2f80894cc43ecc58fdefc3e43027f1bb5d6d0680087515e
[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" "ca147f4ab70e6889d2f80894cc43ecc58fdefc3e43027f1bb5d6d0680087515e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca147f4ab70e6889d2f80894cc43ecc58fdefc3e43027f1bb5d6d0680087515e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca147f4ab70e6889d2f80894cc43ecc58fdefc3e43027f1bb5d6d0680087515e", kill_on_drop: false }`
[INFO] [stdout] ca147f4ab70e6889d2f80894cc43ecc58fdefc3e43027f1bb5d6d0680087515e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ded893bb5ebb31812a9e2e2d8f40c9fe1df426119c334d109fe6c92b6c15f35a
[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" "ded893bb5ebb31812a9e2e2d8f40c9fe1df426119c334d109fe6c92b6c15f35a", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures v0.1.28
[INFO] [stderr]    Compiling syn v0.15.43
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.17 (https://github.com/rust-lang-nursery/futures-rs.git?rev=049922dc4f26b0b3123a7824a72b4c109bebd86a#049922dc)
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.17 (https://github.com/rust-lang-nursery/futures-rs.git?rev=049922dc4f26b0b3123a7824a72b4c109bebd86a#049922dc)
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling cc v1.0.38
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling heim-common v0.0.6
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling route-recognizer v0.1.12
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling safemem v0.3.1
[INFO] [stderr]    Compiling data-encoding v2.1.2
[INFO] [stderr]    Compiling heim-host v0.0.6
[INFO] [stderr]    Compiling metrics v0.11.0
[INFO] [stderr]    Compiling metrics-core v0.5.1
[INFO] [stderr]    Compiling platforms v0.2.0
[INFO] [stderr]    Compiling macaddr v0.1.1
[INFO] [stderr]    Compiling hashbrown v0.5.0
[INFO] [stderr]    Compiling arc-swap v0.3.11
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling lock_api v0.2.0
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.17 (https://github.com/rust-lang-nursery/futures-rs.git?rev=049922dc4f26b0b3123a7824a72b4c109bebd86a#049922dc)
[INFO] [stderr]    Compiling unicode-normalization v0.1.8
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.17 (https://github.com/rust-lang-nursery/futures-rs.git?rev=049922dc4f26b0b3123a7824a72b4c109bebd86a#049922dc)
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling getrandom v0.1.8
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling quanta v0.3.1
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling im v12.3.4
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling twoway v0.1.8
[INFO] [stderr]    Compiling buf_redux v0.8.4
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling sized-chunks v0.1.3
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling hdrhistogram v6.3.4
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling tokio-executor v0.1.8
[INFO] [stderr]    Compiling tokio-sync v0.1.6
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling http v0.1.18
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling tokio-timer v0.2.11
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling url v2.1.0
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling backtrace v0.3.34
[INFO] [stderr]    Compiling mime_guess v1.8.7
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling multipart v0.16.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.8
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling heim-derive v0.0.6
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.17 (https://github.com/rust-lang-nursery/futures-rs.git?rev=049922dc4f26b0b3123a7824a72b4c109bebd86a#049922dc)
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.17 (https://github.com/rust-lang-nursery/futures-rs.git?rev=049922dc4f26b0b3123a7824a72b4c109bebd86a#049922dc)
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.17 (https://github.com/rust-lang-nursery/futures-rs.git?rev=049922dc4f26b0b3123a7824a72b4c109bebd86a#049922dc)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/futures-rs-4ca77cb4f4f05ac4/049922d/futures-util/src/lib.rs:4:38
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "async-await", feature(async_await))]
[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 `futures-util-preview`
[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" "ded893bb5ebb31812a9e2e2d8f40c9fe1df426119c334d109fe6c92b6c15f35a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ded893bb5ebb31812a9e2e2d8f40c9fe1df426119c334d109fe6c92b6c15f35a", kill_on_drop: false }`
[INFO] [stdout] ded893bb5ebb31812a9e2e2d8f40c9fe1df426119c334d109fe6c92b6c15f35a