[INFO] updating cached repository dannyow/reMarkable-fractals
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dannyow/reMarkable-fractals
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dannyow/reMarkable-fractals" "work/ex/beta-1.37-6/sources/1.36.0/gh/dannyow/reMarkable-fractals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/dannyow/reMarkable-fractals'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dannyow/reMarkable-fractals" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dannyow/reMarkable-fractals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dannyow/reMarkable-fractals'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7931882c15dc16c68736d0261999ee7cadbb4322
[INFO] sha for GitHub repo dannyow/reMarkable-fractals: 7931882c15dc16c68736d0261999ee7cadbb4322
[INFO] validating manifest of dannyow/reMarkable-fractals on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dannyow/reMarkable-fractals on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dannyow/reMarkable-fractals
[INFO] finished frobbing dannyow/reMarkable-fractals
[INFO] frobbed toml for dannyow/reMarkable-fractals written to work/ex/beta-1.37-6/sources/1.36.0/gh/dannyow/reMarkable-fractals/Cargo.toml
[INFO] started frobbing dannyow/reMarkable-fractals
[INFO] finished frobbing dannyow/reMarkable-fractals
[INFO] frobbed toml for dannyow/reMarkable-fractals written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dannyow/reMarkable-fractals/Cargo.toml
[INFO] crate dannyow/reMarkable-fractals already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing dannyow/reMarkable-fractals against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/dannyow/reMarkable-fractals:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] a97173d8fa87f11c2f8e940db913fbd76c1b277c79a080d4b4523fd77bc2f0e1
[INFO] running `"docker" "start" "-a" "a97173d8fa87f11c2f8e940db913fbd76c1b277c79a080d4b4523fd77bc2f0e1"`
[INFO] [stderr]    Compiling ioctl-gen v0.1.1
[INFO] [stderr]    Compiling lua52-sys v0.1.1
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling line_drawing v0.7.0
[INFO] [stderr]    Compiling nix v0.8.1
[INFO] [stderr]    Compiling epoll v3.1.1
[INFO] [stderr]    Compiling aabb-quadtree v0.1.0
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling mmap v0.1.1
[INFO] [stderr]    Compiling ordered-float v0.5.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]    Compiling rusttype v0.4.3
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling evdev v0.10.1
[INFO] [stderr]    Compiling hlua v0.4.1
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling env_logger v0.5.9
[INFO] [stderr]    Compiling libremarkable v0.1.25
[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/libremarkable-0.1.25/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(integer_atomics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[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/libremarkable-0.1.25/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(const_size_of)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `libremarkable`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a97173d8fa87f11c2f8e940db913fbd76c1b277c79a080d4b4523fd77bc2f0e1"`
[INFO] running `"docker" "rm" "-f" "a97173d8fa87f11c2f8e940db913fbd76c1b277c79a080d4b4523fd77bc2f0e1"`
[INFO] [stdout] a97173d8fa87f11c2f8e940db913fbd76c1b277c79a080d4b4523fd77bc2f0e1