[INFO] updating cached repository https://github.com/lgo/rails
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bfc3a960f22cf6af7e92562886fee49c5fd64721
[INFO] testing lgo/rails against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Flgo%2Frails" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lgo/rails on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/lgo/rails
[INFO] finished tweaking git repo https://github.com/lgo/rails
[INFO] tweaked toml for git repo https://github.com/lgo/rails written to work/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/lgo/rails already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] f896bccc8b5c2d25b6209dc801db30d07aa279d4b819871ebf25efe66504698a
[INFO] running `"docker" "start" "-a" "f896bccc8b5c2d25b6209dc801db30d07aa279d4b819871ebf25efe66504698a"`
[INFO] [stderr] warning: unused manifest key: target.rpi2.features
[INFO] [stderr]    Compiling rails v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable 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" "f896bccc8b5c2d25b6209dc801db30d07aa279d4b819871ebf25efe66504698a"`
[INFO] running `"docker" "rm" "-f" "f896bccc8b5c2d25b6209dc801db30d07aa279d4b819871ebf25efe66504698a"`
[INFO] [stdout] f896bccc8b5c2d25b6209dc801db30d07aa279d4b819871ebf25efe66504698a