[INFO] updating cached repository deuteros-org/deuteros
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/deuteros-org/deuteros
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/deuteros-org/deuteros" "work/ex/beta-1.38-1/sources/1.37.0/gh/deuteros-org/deuteros"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/deuteros-org/deuteros'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/deuteros-org/deuteros" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deuteros-org/deuteros"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deuteros-org/deuteros'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 69866869dd22da0ae26f449d70f9035f5f4b3d87
[INFO] sha for GitHub repo deuteros-org/deuteros: 69866869dd22da0ae26f449d70f9035f5f4b3d87
[INFO] validating manifest of deuteros-org/deuteros 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 deuteros-org/deuteros 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 deuteros-org/deuteros
[INFO] finished frobbing deuteros-org/deuteros
[INFO] frobbed toml for deuteros-org/deuteros written to work/ex/beta-1.38-1/sources/1.37.0/gh/deuteros-org/deuteros/Cargo.toml
[INFO] started frobbing deuteros-org/deuteros
[INFO] finished frobbing deuteros-org/deuteros
[INFO] frobbed toml for deuteros-org/deuteros written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deuteros-org/deuteros/Cargo.toml
[INFO] crate deuteros-org/deuteros 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 deuteros-org/deuteros 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-3/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/deuteros-org/deuteros:/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] d11847c85ca7807300a43ad5cc04279cfcbd686ebe005651d8f7c81d40b78756
[INFO] running `"docker" "start" "-a" "d11847c85ca7807300a43ad5cc04279cfcbd686ebe005651d8f7c81d40b78756"`
[INFO] [stderr]    Compiling rlibc v1.0.0
[INFO] [stderr]    Compiling deuteros 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:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | #![feature(lang_items)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/main.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![feature(const_fn)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/main.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | #![feature(associated_consts)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/main.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | #![feature(naked_functions)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/main.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | #![feature(asm)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stderr]    --> src/main.rs:186:1
[INFO] [stderr]     |
[INFO] [stderr] 186 | #[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] error: aborting due to 7 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 `deuteros`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d11847c85ca7807300a43ad5cc04279cfcbd686ebe005651d8f7c81d40b78756"`
[INFO] running `"docker" "rm" "-f" "d11847c85ca7807300a43ad5cc04279cfcbd686ebe005651d8f7c81d40b78756"`
[INFO] [stdout] d11847c85ca7807300a43ad5cc04279cfcbd686ebe005651d8f7c81d40b78756