[INFO] fetching crate fart-cli 0.4.0...
[INFO] testing fart-cli-0.4.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate fart-cli 0.4.0 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate fart-cli 0.4.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fart-cli 0.4.0
[INFO] finished tweaking crates.io crate fart-cli 0.4.0
[INFO] tweaked toml for crates.io crate fart-cli 0.4.0 written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate crates.io crate fart-cli 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded data-encoding v2.1.2
[INFO] [stderr]   Downloaded predicates v1.0.2
[INFO] [stderr]   Downloaded float-cmp v0.5.3
[INFO] [stderr]   Downloaded tide v0.4.0
[INFO] [stderr]   Downloaded broadcaster v0.2.6
[INFO] [stderr]   Downloaded notify v4.0.14
[INFO] [stderr]   Downloaded quickcheck v0.9.0
[INFO] [stderr]   Downloaded http-service v0.4.0
[INFO] [stderr]   Downloaded http-service-hyper v0.4.1
[INFO] [stderr]   Downloaded pin-project-lite v0.1.1
[INFO] [stderr]   Downloaded serde_qs v0.5.2
[INFO] [stderr]   Downloaded async-std v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2dff3cbf58bfeccbaab1899811046312c0805d878dafd7feae65b183af6c6582
[INFO] running `Command { std: "docker" "start" "-a" "2dff3cbf58bfeccbaab1899811046312c0805d878dafd7feae65b183af6c6582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2dff3cbf58bfeccbaab1899811046312c0805d878dafd7feae65b183af6c6582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dff3cbf58bfeccbaab1899811046312c0805d878dafd7feae65b183af6c6582", kill_on_drop: false }`
[INFO] [stdout] 2dff3cbf58bfeccbaab1899811046312c0805d878dafd7feae65b183af6c6582
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6293430446d6a99dfcc8c35bcda308accd9380560d1a826e7f17406afe36b4bd
[INFO] running `Command { std: "docker" "start" "-a" "6293430446d6a99dfcc8c35bcda308accd9380560d1a826e7f17406afe36b4bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
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[INFO] [stderr]    Compiling memchr v2.2.1
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[INFO] [stderr]    Compiling futures-core v0.3.1
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
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[INFO] [stderr]    Compiling futures-sink v0.3.1
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[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-task v0.3.1
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling once_cell v1.2.0
[INFO] [stderr]    Compiling pin-project-lite v0.1.1
[INFO] [stderr]    Compiling futures-timer v2.0.2
[INFO] [stderr]    Compiling try-lock v0.2.2
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[INFO] [stderr]    Compiling unicode-width v0.1.7
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[INFO] [stderr]    Compiling tokio-io v0.1.12
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[INFO] [stderr]    Compiling string v0.2.1
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[INFO] [stderr]    Compiling crossbeam-deque v0.7.2
[INFO] [stderr]    Compiling tokio-threadpool v0.1.17
[INFO] [stderr]    Compiling tokio-reactor v0.1.11
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling async-std v1.3.0
[INFO] [stderr]    Compiling notify v4.0.14
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling chrono v0.4.10
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling structopt-derive v0.3.5
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling structopt v0.3.5
[INFO] [stderr]    Compiling futures-util v0.3.1
[INFO] [stderr]    Compiling futures-executor v0.3.1
[INFO] [stderr]    Compiling futures v0.3.1
[INFO] [stderr]    Compiling http-service v0.4.0
[INFO] [stderr]    Compiling http-service-hyper v0.4.1
[INFO] [stderr]    Compiling serde_json v1.0.44
[INFO] [stderr]    Compiling serde_qs v0.5.2
[INFO] [stderr]    Compiling tide v0.4.0
[INFO] [stderr]    Compiling fart-cli v0.4.0 (/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] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fart-cli` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6293430446d6a99dfcc8c35bcda308accd9380560d1a826e7f17406afe36b4bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6293430446d6a99dfcc8c35bcda308accd9380560d1a826e7f17406afe36b4bd", kill_on_drop: false }`
[INFO] [stdout] 6293430446d6a99dfcc8c35bcda308accd9380560d1a826e7f17406afe36b4bd