[INFO] updating cached repository lgo/rails
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lgo/rails
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lgo/rails" "work/ex/beta-1.38-1/sources/1.37.0/gh/lgo/rails"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lgo/rails'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lgo/rails" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lgo/rails"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lgo/rails'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bfc3a960f22cf6af7e92562886fee49c5fd64721
[INFO] sha for GitHub repo lgo/rails: bfc3a960f22cf6af7e92562886fee49c5fd64721
[INFO] validating manifest of lgo/rails 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 lgo/rails 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 lgo/rails
[INFO] finished frobbing lgo/rails
[INFO] frobbed toml for lgo/rails written to work/ex/beta-1.38-1/sources/1.37.0/gh/lgo/rails/Cargo.toml
[INFO] started frobbing lgo/rails
[INFO] finished frobbing lgo/rails
[INFO] frobbed toml for lgo/rails written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lgo/rails/Cargo.toml
[INFO] crate lgo/rails 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 lgo/rails 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-1/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/lgo/rails:/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] 239ca1fab5a75d1e4229f5472362f61cb13496480e2a1307fa676b830f3d3694
[INFO] running `"docker" "start" "-a" "239ca1fab5a75d1e4229f5472362f61cb13496480e2a1307fa676b830f3d3694"`
[INFO] [stderr] warning: unused manifest key: target.rpi2.features
[INFO] [stderr]    Compiling rails v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(lang_items)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/kernel/task_descriptor.rs:6:15
[INFO] [stderr]   |
[INFO] [stderr] 6 |   entrypoint: Fn(),
[INFO] [stderr]   |               ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]  --> src/kernel/scheduler.rs:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 |   next: Option<&Node<T>>,
[INFO] [stderr]   |                ^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]  --> src/kernel/scheduler.rs:7:16
[INFO] [stderr]   |
[INFO] [stderr] 7 |   prev: Option<&Node<T>>,
[INFO] [stderr]   |                ^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/kernel/scheduler.rs:12:14
[INFO] [stderr]    |
[INFO] [stderr] 12 |   next: Node<&TaskDescriptor>,
[INFO] [stderr]    |              ^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0124]: field `priorities_ready` is already declared
[INFO] [stderr]   --> src/kernel/scheduler.rs:17:3
[INFO] [stderr]    |
[INFO] [stderr] 16 |   priorities_ready: [bool; 32],
[INFO] [stderr]    |   ---------------------------- `priorities_ready` first declared here
[INFO] [stderr] 17 |   priorities_ready: [bool; 32],
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field already declared
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0106, E0124, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0106`.
[INFO] [stderr] error: Could not compile `rails`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "239ca1fab5a75d1e4229f5472362f61cb13496480e2a1307fa676b830f3d3694"`
[INFO] running `"docker" "rm" "-f" "239ca1fab5a75d1e4229f5472362f61cb13496480e2a1307fa676b830f3d3694"`
[INFO] [stdout] 239ca1fab5a75d1e4229f5472362f61cb13496480e2a1307fa676b830f3d3694