[INFO] updating cached repository placefortea/teatree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/placefortea/teatree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/placefortea/teatree" "work/ex/beta-1.38-1/sources/1.37.0/gh/placefortea/teatree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/placefortea/teatree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/placefortea/teatree" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/placefortea/teatree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/placefortea/teatree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7a56755a428fe63ee753df67a7c71d8f668e17ec
[INFO] sha for GitHub repo placefortea/teatree: 7a56755a428fe63ee753df67a7c71d8f668e17ec
[INFO] validating manifest of placefortea/teatree on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of placefortea/teatree on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing placefortea/teatree
[INFO] finished frobbing placefortea/teatree
[INFO] frobbed toml for placefortea/teatree written to work/ex/beta-1.38-1/sources/1.37.0/gh/placefortea/teatree/Cargo.toml
[INFO] started frobbing placefortea/teatree
[INFO] finished frobbing placefortea/teatree
[INFO] frobbed toml for placefortea/teatree written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/placefortea/teatree/Cargo.toml
[INFO] crate placefortea/teatree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing placefortea/teatree against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/placefortea/teatree:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] be3438284382c7351d34351f5e192cc8df07d4be269174b16b56d2385461b15f
[INFO] running `"docker" "start" "-a" "be3438284382c7351d34351f5e192cc8df07d4be269174b16b56d2385461b15f"`
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]    Compiling futures v0.1.26
[INFO] [stderr]    Compiling subtle v2.1.0
[INFO] [stderr]    Compiling bitflags v1.0.5
[INFO] [stderr]    Compiling historian v4.0.3
[INFO] [stderr]    Compiling hashbrown v0.2.2
[INFO] [stderr]    Compiling bincode v1.1.3
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling clear_on_drop v0.2.3
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling sha3 v0.7.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling curve25519-dalek v1.1.3
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling http v0.1.17
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-executor v0.1.7
[INFO] [stderr]    Compiling tokio-sync v0.1.5
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling tokio-timer v0.2.10
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio v0.1.19
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[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 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 serde v1.0.90
[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/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(vec_drain_as_slice)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `teatree`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "be3438284382c7351d34351f5e192cc8df07d4be269174b16b56d2385461b15f"`
[INFO] running `"docker" "rm" "-f" "be3438284382c7351d34351f5e192cc8df07d4be269174b16b56d2385461b15f"`
[INFO] [stdout] be3438284382c7351d34351f5e192cc8df07d4be269174b16b56d2385461b15f