[INFO] updating cached repository rubytogether/kirby
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rubytogether/kirby
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rubytogether/kirby" "work/ex/beta-1.38-1/sources/1.37.0/gh/rubytogether/kirby"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rubytogether/kirby'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rubytogether/kirby" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rubytogether/kirby"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rubytogether/kirby'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9495d6a4fa5c64bdd42172396b089b56096e0c18
[INFO] sha for GitHub repo rubytogether/kirby: 9495d6a4fa5c64bdd42172396b089b56096e0c18
[INFO] validating manifest of rubytogether/kirby 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 rubytogether/kirby 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 rubytogether/kirby
[INFO] disabled cargo feature 'default-run' from rubytogether/kirby
[INFO] finished frobbing rubytogether/kirby
[INFO] frobbed toml for rubytogether/kirby written to work/ex/beta-1.38-1/sources/1.37.0/gh/rubytogether/kirby/Cargo.toml
[INFO] started frobbing rubytogether/kirby
[INFO] disabled cargo feature 'default-run' from rubytogether/kirby
[INFO] finished frobbing rubytogether/kirby
[INFO] frobbed toml for rubytogether/kirby written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rubytogether/kirby/Cargo.toml
[INFO] crate rubytogether/kirby 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rubytogether/kirby 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-4/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/rubytogether/kirby:/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] 6ca2c8553d49dec292b2bad08408f595715fdcc544e8e23e5a34cce0b8e90fb5
[INFO] running `"docker" "start" "-a" "6ca2c8553d49dec292b2bad08408f595715fdcc544e8e23e5a34cce0b8e90fb5"`
[INFO] [stderr]    Compiling serde v1.0.75
[INFO] [stderr]    Compiling cc v1.0.22
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling futures v0.1.24
[INFO] [stderr]    Compiling ryu v0.2.5
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]    Compiling same-file v1.0.3
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling bytecount v0.3.2
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling regex v1.0.4
[INFO] [stderr]    Compiling array-macro v1.0.2
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling reexport-proc-macro v1.0.5
[INFO] [stderr]    Compiling argparse v0.2.2
[INFO] [stderr]    Compiling memchr v2.0.2
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling walkdir v2.2.5
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling nom v4.0.0
[INFO] [stderr]    Compiling lock_api v0.1.3
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling tokio-executor v0.1.4
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling tower-service v0.1.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling ring v0.13.2
[INFO] [stderr]    Compiling libz-sys v1.0.20
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.5.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling tokio-timer v0.2.6
[INFO] [stderr]    Compiling tokio-current-thread v0.1.1
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling crossbeam-deque v0.6.1
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling pest_derive v1.0.8
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.6
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling flate2 v1.0.2
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling serde_schema_derive v0.1.0 (https://github.com/srijs/rust-serde-schema#da935d38)
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling bytes v0.4.10
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling serde_bytes v0.10.4
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling hashbrown v0.1.6
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/hashbrown-0.1.6/src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     feature(alloc, alloc_layout_extra, allocator_api, ptr_offset_from, test, core_intrinsics)
[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 `hashbrown`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "6ca2c8553d49dec292b2bad08408f595715fdcc544e8e23e5a34cce0b8e90fb5"`
[INFO] running `"docker" "rm" "-f" "6ca2c8553d49dec292b2bad08408f595715fdcc544e8e23e5a34cce0b8e90fb5"`
[INFO] [stdout] 6ca2c8553d49dec292b2bad08408f595715fdcc544e8e23e5a34cce0b8e90fb5