[INFO] updating cached repository zeonin/boot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zeonin/boot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zeonin/boot" "work/ex/beta-1.38-1/sources/1.37.0/gh/zeonin/boot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/zeonin/boot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zeonin/boot" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zeonin/boot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zeonin/boot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b03006c8fe2edbf61f506883024f9c9f434c2d7
[INFO] sha for GitHub repo zeonin/boot: 3b03006c8fe2edbf61f506883024f9c9f434c2d7
[INFO] validating manifest of zeonin/boot 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 zeonin/boot 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 zeonin/boot
[INFO] finished frobbing zeonin/boot
[INFO] frobbed toml for zeonin/boot written to work/ex/beta-1.38-1/sources/1.37.0/gh/zeonin/boot/Cargo.toml
[INFO] started frobbing zeonin/boot
[INFO] finished frobbing zeonin/boot
[INFO] frobbed toml for zeonin/boot written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zeonin/boot/Cargo.toml
[INFO] crate zeonin/boot 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] testing zeonin/boot 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-7/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/zeonin/boot:/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] 6203702155f005b8352147a6a80971fed8a244b84d0b5c3309bc60820b03c5a0
[INFO] running `"docker" "start" "-a" "6203702155f005b8352147a6a80971fed8a244b84d0b5c3309bc60820b03c5a0"`
[INFO] [stderr]    Compiling rlibc v1.0.0
[INFO] [stderr]    Compiling uefi v0.1.0 (https://github.com/zeonin/uefi#53612a58)
[INFO] [stderr]    Compiling boot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(asm, lang_items, naked_functions, start)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | #[lang = "panic_fmt"]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `panic_fmt`
[INFO] [stderr] 
[INFO] [stderr] error: `#[panic_handler]` function required, but not found
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     0
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0522, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0522`.
[INFO] [stderr] error: Could not compile `boot`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6203702155f005b8352147a6a80971fed8a244b84d0b5c3309bc60820b03c5a0"`
[INFO] running `"docker" "rm" "-f" "6203702155f005b8352147a6a80971fed8a244b84d0b5c3309bc60820b03c5a0"`
[INFO] [stdout] 6203702155f005b8352147a6a80971fed8a244b84d0b5c3309bc60820b03c5a0