[INFO] cloning repository https://github.com/kbingman/tidal
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kbingman/tidal" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkbingman%2Ftidal", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkbingman%2Ftidal'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e93e903b0b3dbeb658a0cb080b1221cdeea3988d
[INFO] testing kbingman/tidal against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkbingman%2Ftidal" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kbingman/tidal 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/kbingman/tidal
[INFO] finished tweaking git repo https://github.com/kbingman/tidal
[INFO] tweaked toml for git repo https://github.com/kbingman/tidal written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/kbingman/tidal 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] [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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 656c9bc079f502727e3419dc36c8ddad8d14a5cb2a92c3d8835276a5f8339aeb
[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" "656c9bc079f502727e3419dc36c8ddad8d14a5cb2a92c3d8835276a5f8339aeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "656c9bc079f502727e3419dc36c8ddad8d14a5cb2a92c3d8835276a5f8339aeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "656c9bc079f502727e3419dc36c8ddad8d14a5cb2a92c3d8835276a5f8339aeb", kill_on_drop: false }`
[INFO] [stdout] 656c9bc079f502727e3419dc36c8ddad8d14a5cb2a92c3d8835276a5f8339aeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 92b0a3f4888ac6b88554073ace2f1eb95f353d248364a8320bb7343b0769f96a
[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" "92b0a3f4888ac6b88554073ace2f1eb95f353d248364a8320bb7343b0769f96a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.100
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling route-recognizer v0.1.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling data-encoding v2.1.2
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling hyper v0.12.34
[INFO] [stderr]    Compiling twoway v0.1.8
[INFO] [stderr]    Compiling buf_redux v0.8.4
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling serde_derive v1.0.100
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling mime_guess v1.8.7
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling backtrace v0.3.37
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling multipart v0.16.1
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling http-service v0.3.1
[INFO] [stderr]    Compiling juniper_codegen v0.13.2
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling indexmap v1.2.0
[INFO] [stderr]    Compiling serde_urlencoded v0.6.1
[INFO] [stderr]    Compiling serde_qs v0.5.0
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling tide-core v0.2.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling juniper v0.13.1
[INFO] [stderr]    Compiling tide-cookies v0.2.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling tide-querystring v0.1.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling tide-log v0.1.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling tide-cors v0.2.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling tide-headers v0.1.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling tide-forms v0.1.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling http-service-hyper v0.3.1
[INFO] [stderr]    Compiling tide v0.2.0 (https://github.com/rustasync/tide.git#af0b900b)
[INFO] [stderr]    Compiling tidal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tidal`
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "92b0a3f4888ac6b88554073ace2f1eb95f353d248364a8320bb7343b0769f96a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92b0a3f4888ac6b88554073ace2f1eb95f353d248364a8320bb7343b0769f96a", kill_on_drop: false }`
[INFO] [stdout] 92b0a3f4888ac6b88554073ace2f1eb95f353d248364a8320bb7343b0769f96a