[INFO] updating cached repository https://github.com/placefortea/teatree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7a56755a428fe63ee753df67a7c71d8f668e17ec
[INFO] testing placefortea/teatree against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fplacefortea%2Fteatree" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/placefortea/teatree on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/placefortea/teatree
[INFO] finished tweaking git repo https://github.com/placefortea/teatree
[INFO] tweaked toml for git repo https://github.com/placefortea/teatree written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/placefortea/teatree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] 128cee0c295bc79c839c4083b420be21b72314d346f04f7e2944fcbd3f2fb166
[INFO] running `Command { std: "docker" "start" "-a" "128cee0c295bc79c839c4083b420be21b72314d346f04f7e2944fcbd3f2fb166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "128cee0c295bc79c839c4083b420be21b72314d346f04f7e2944fcbd3f2fb166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "128cee0c295bc79c839c4083b420be21b72314d346f04f7e2944fcbd3f2fb166", kill_on_drop: false }`
[INFO] [stdout] 128cee0c295bc79c839c4083b420be21b72314d346f04f7e2944fcbd3f2fb166
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eee7e718a193b803b4eb5633e3c7e835f206842311ef5723e3ac1ae9e146a1a2
[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" "eee7e718a193b803b4eb5633e3c7e835f206842311ef5723e3ac1ae9e146a1a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.29
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]    Compiling cc v1.0.36
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]    Compiling subtle v2.1.0
[INFO] [stderr]    Compiling bitflags v1.0.5
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling hashbrown v0.2.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling bincode v1.1.3
[INFO] [stderr]    Compiling crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling resolv-conf v0.6.2
[INFO] [stderr]    Compiling digest v0.7.6
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling sha3 v0.7.3
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling clear_on_drop v0.2.3
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling curve25519-dalek v1.1.3
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling http v0.1.17
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio v0.1.19
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]    Compiling derive_more v0.14.0
[INFO] [stderr]    Compiling enum-as-inner v0.2.1
[INFO] [stderr]    Compiling actix_derive v0.4.0
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling trust-dns-proto v0.7.3
[INFO] [stderr]    Compiling actix-threadpool v0.1.0
[INFO] [stderr]    Compiling actix-rt v0.2.2
[INFO] [stderr]    Compiling trust-dns-resolver v0.11.0
[INFO] [stderr]    Compiling actix v0.8.1
[INFO] [stderr]    Compiling hashbrown v0.3.0
[INFO] [stderr]    Compiling serde_bytes v0.11.1
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling ed25519-dalek v1.0.0-pre.1
[INFO] [stderr]    Compiling toml v0.5.0
[INFO] [stderr]    Compiling pagecache v0.17.0
[INFO] [stderr]    Compiling jsonrpc-parse v0.1.2
[INFO] [stderr]    Compiling sled v0.24.1
[INFO] [stderr]    Compiling teatree v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_drain_as_slice)]
[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 `teatree`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "eee7e718a193b803b4eb5633e3c7e835f206842311ef5723e3ac1ae9e146a1a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eee7e718a193b803b4eb5633e3c7e835f206842311ef5723e3ac1ae9e146a1a2", kill_on_drop: false }`
[INFO] [stdout] eee7e718a193b803b4eb5633e3c7e835f206842311ef5723e3ac1ae9e146a1a2