[INFO] fetching crate cxmr-ws-client-poloniex 0.0.1...
[INFO] testing cxmr-ws-client-poloniex-0.0.1 against 1.47.0 for beta-1.48-1
[INFO] extracting crate cxmr-ws-client-poloniex 0.0.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate cxmr-ws-client-poloniex 0.0.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cxmr-ws-client-poloniex 0.0.1
[INFO] finished tweaking crates.io crate cxmr-ws-client-poloniex 0.0.1
[INFO] tweaked toml for crates.io crate cxmr-ws-client-poloniex 0.0.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate cxmr-ws-client-poloniex 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.47.0" "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] 5126ddf06245c691188332d8c8bff6d10206930c4c8720a6c73a5eba29789005
[INFO] running `Command { std: "docker" "start" "-a" "5126ddf06245c691188332d8c8bff6d10206930c4c8720a6c73a5eba29789005", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5126ddf06245c691188332d8c8bff6d10206930c4c8720a6c73a5eba29789005", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5126ddf06245c691188332d8c8bff6d10206930c4c8720a6c73a5eba29789005", kill_on_drop: false }`
[INFO] [stdout] 5126ddf06245c691188332d8c8bff6d10206930c4c8720a6c73a5eba29789005
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 332905697e4793b99da1e744f93f634cfebe08b0c42310a99def74cb2c030ece
[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" "332905697e4793b99da1e744f93f634cfebe08b0c42310a99def74cb2c030ece", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling smallvec v1.1.0
[INFO] [stderr]    Compiling err-convert-macro v0.0.1
[INFO] [stderr]    Compiling tokio-macros v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling futures-util v0.3.1
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling unicode-normalization v0.1.11
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling tokio v0.2.6
[INFO] [stderr]    Compiling url v2.1.0
[INFO] [stderr]    Compiling futures-executor v0.3.1
[INFO] [stderr]    Compiling futures v0.3.1
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.44
[INFO] [stderr]    Compiling tokio-util v0.2.0
[INFO] [stderr]    Compiling tokio-tls v0.3.0
[INFO] [stderr]    Compiling cxmr-balances v0.0.1
[INFO] [stderr]    Compiling cxmr-currency v0.0.1
[INFO] [stderr]    Compiling h2 v0.2.1
[INFO] [stderr]    Compiling websocket-codec v0.2.2
[INFO] [stderr]    Compiling websocket-lite v0.3.2
[INFO] [stderr]    Compiling cxmr-exchanges v0.0.1
[INFO] [stderr]    Compiling hyper v0.13.1
[INFO] [stderr]    Compiling cxmr-feeds v0.0.1
[INFO] [stderr]    Compiling hyper-tls v0.4.0
[INFO] [stderr]    Compiling cxmr-http-client v0.0.1
[INFO] [stderr]    Compiling cxmr-api-clients-errors v0.0.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cxmr-api-clients-errors-0.0.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_trait)]
[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 `cxmr-api-clients-errors`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "332905697e4793b99da1e744f93f634cfebe08b0c42310a99def74cb2c030ece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "332905697e4793b99da1e744f93f634cfebe08b0c42310a99def74cb2c030ece", kill_on_drop: false }`
[INFO] [stdout] 332905697e4793b99da1e744f93f634cfebe08b0c42310a99def74cb2c030ece
