[INFO] fetching crate dyon 0.46.0...
[INFO] checking dyon-0.46.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate dyon 0.46.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate dyon 0.46.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dyon 0.46.0
[INFO] finished tweaking crates.io crate dyon 0.46.0
[INFO] tweaked toml for crates.io crate dyon 0.46.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate dyon 0.46.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--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 advancedresearch-tree_mem_sort v0.2.0
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] 4bd8e914f7cd1084f323d2340175f882803a65cdc7dba309fd271f72aea53385
[INFO] running `Command { std: "docker" "start" "-a" "4bd8e914f7cd1084f323d2340175f882803a65cdc7dba309fd271f72aea53385", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bd8e914f7cd1084f323d2340175f882803a65cdc7dba309fd271f72aea53385", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bd8e914f7cd1084f323d2340175f882803a65cdc7dba309fd271f72aea53385", kill_on_drop: false }`
[INFO] [stdout] 4bd8e914f7cd1084f323d2340175f882803a65cdc7dba309fd271f72aea53385
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37b58c5f8d1391ce73804343472dcf8f670fcd3505daeb35ea302e5cf171a76d
[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" "37b58c5f8d1391ce73804343472dcf8f670fcd3505daeb35ea302e5cf171a76d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]     Checking smallvec v1.0.0
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]    Compiling encoding_rs v0.8.20
[INFO] [stderr]     Checking range v1.0.0
[INFO] [stderr]     Checking mime v0.3.14
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]     Checking piston-float v1.0.0
[INFO] [stderr]     Checking read_color v1.0.0
[INFO] [stderr]     Checking advancedresearch-tree_mem_sort v0.2.0
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking vecmath v1.0.0
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]     Checking read_token v1.0.0
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking piston_meta v2.0.0
[INFO] [stderr]     Checking mime_guess v2.0.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking tokio-sync v0.1.7
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]     Checking tokio-threadpool v0.1.16
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.19
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking tokio-reactor v0.1.10
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking serde v1.0.102
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.22
[INFO] [stderr]     Checking dyon v0.46.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![cfg_attr(test, feature(test))]
[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 `dyon` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "37b58c5f8d1391ce73804343472dcf8f670fcd3505daeb35ea302e5cf171a76d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37b58c5f8d1391ce73804343472dcf8f670fcd3505daeb35ea302e5cf171a76d", kill_on_drop: false }`
[INFO] [stdout] 37b58c5f8d1391ce73804343472dcf8f670fcd3505daeb35ea302e5cf171a76d
