[INFO] crate libremarkable 0.3.2 is already in cache
[INFO] extracting crate libremarkable 0.3.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/libremarkable/0.3.2
[INFO] extracting crate libremarkable 0.3.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libremarkable/0.3.2
[INFO] validating manifest of libremarkable-0.3.2 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 libremarkable-0.3.2 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 libremarkable-0.3.2
[INFO] removed 0 missing examples
[INFO] finished frobbing libremarkable-0.3.2
[INFO] frobbed toml for libremarkable-0.3.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/libremarkable/0.3.2/Cargo.toml
[INFO] started frobbing libremarkable-0.3.2
[INFO] removed 0 missing examples
[INFO] finished frobbing libremarkable-0.3.2
[INFO] frobbed toml for libremarkable-0.3.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libremarkable/0.3.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] testing libremarkable-0.3.2 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libremarkable/0.3.2:/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] a2455df5318a19201ab82ff1a996c5ff6c5ba7b0b741c534b5ed53f3c4403906
[INFO] running `"docker" "start" "-a" "a2455df5318a19201ab82ff1a996c5ff6c5ba7b0b741c534b5ed53f3c4403906"`
[INFO] [stderr]    Compiling ioctl-gen v0.1.1
[INFO] [stderr]    Compiling atomic v0.4.5
[INFO] [stderr]    Compiling aabb-quadtree v0.1.0
[INFO] [stderr]    Compiling nix v0.8.1
[INFO] [stderr]    Compiling epoll v3.1.1
[INFO] [stderr]    Compiling rusttype v0.4.3
[INFO] [stderr]    Compiling stopwatch v0.0.7
[INFO] [stderr]    Compiling cc v1.0.40
[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/atomic-0.4.5/src/lib.rs:36:26
[INFO] [stderr]    |
[INFO] [stderr] 36 |     feature = "nightly", feature(const_fn, cfg_target_has_atomic, atomic_min_max)
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling image v0.18.0
[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 `atomic`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a2455df5318a19201ab82ff1a996c5ff6c5ba7b0b741c534b5ed53f3c4403906"`
[INFO] running `"docker" "rm" "-f" "a2455df5318a19201ab82ff1a996c5ff6c5ba7b0b741c534b5ed53f3c4403906"`
[INFO] [stdout] a2455df5318a19201ab82ff1a996c5ff6c5ba7b0b741c534b5ed53f3c4403906