[INFO] fetching crate rusty-boy-advance 0.0.4...
[INFO] testing rusty-boy-advance-0.0.4 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate rusty-boy-advance 0.0.4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate rusty-boy-advance 0.0.4 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rusty-boy-advance 0.0.4
[INFO] finished tweaking crates.io crate rusty-boy-advance 0.0.4
[INFO] tweaked toml for crates.io crate rusty-boy-advance 0.0.4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db01fb2064156af35c59b3538af8ce9a6740d3edca3b17e3e6c7172a223feba8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "db01fb2064156af35c59b3538af8ce9a6740d3edca3b17e3e6c7172a223feba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db01fb2064156af35c59b3538af8ce9a6740d3edca3b17e3e6c7172a223feba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db01fb2064156af35c59b3538af8ce9a6740d3edca3b17e3e6c7172a223feba8", kill_on_drop: false }`
[INFO] [stdout] db01fb2064156af35c59b3538af8ce9a6740d3edca3b17e3e6c7172a223feba8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8e6c9686913885d1432b88caa4979a52b7a6413ab7562bb53a03f1212df2fbd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f8e6c9686913885d1432b88caa4979a52b7a6413ab7562bb53a03f1212df2fbd", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-boy-advance v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `alloc::slice::SliceConcatExt`
[INFO] [stdout]  --> src/gba/gba.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 | use alloc::{boxed::Box, format, slice::SliceConcatExt, string::String, vec::Vec};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^^^^ no `SliceConcatExt` in `slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(slice_concat_ext)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/gba/gba.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout] 7  | / macro_rules! println_maybe {
[INFO] [stdout] 8  | |   ($($arg:tt)*) => {{
[INFO] [stdout] 9  | |     let x = format!($($arg)*);
[INFO] [stdout] 10 | |     //dbg!(x);
[INFO] [stdout] 11 | |     //println!($($arg)*);
[INFO] [stdout] 12 | |   }};
[INFO] [stdout] 13 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/gba/instructions/thumb.rs:384:7
[INFO] [stdout]     |
[INFO] [stdout] 384 |       (i32::from(gba.fetch_u16(addr) as i16) as u32) // Sign extend
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/gba/instructions/thumb.rs:389:5
[INFO] [stdout]     |
[INFO] [stdout] 389 |     (i32::from(gba.fetch_byte(addr) as i8) as u32) // Sign extend
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rusty-boy-advance`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "f8e6c9686913885d1432b88caa4979a52b7a6413ab7562bb53a03f1212df2fbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8e6c9686913885d1432b88caa4979a52b7a6413ab7562bb53a03f1212df2fbd", kill_on_drop: false }`
[INFO] [stdout] f8e6c9686913885d1432b88caa4979a52b7a6413ab7562bb53a03f1212df2fbd