[INFO] cloning repository https://github.com/kotetuco/Rust-BareMetal-GBA-Sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kotetuco/Rust-BareMetal-GBA-Sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotetuco%2FRust-BareMetal-GBA-Sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotetuco%2FRust-BareMetal-GBA-Sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3bcbba6bf21787d7519c125f223fa46a3cec80fc
[INFO] testing kotetuco/Rust-BareMetal-GBA-Sample against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotetuco%2FRust-BareMetal-GBA-Sample" "/workspace/builds/worker-87/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-87/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kotetuco/Rust-BareMetal-GBA-Sample on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kotetuco/Rust-BareMetal-GBA-Sample
[INFO] finished tweaking git repo https://github.com/kotetuco/Rust-BareMetal-GBA-Sample
[INFO] tweaked toml for git repo https://github.com/kotetuco/Rust-BareMetal-GBA-Sample written to /workspace/builds/worker-87/source/Cargo.toml
[INFO] crate git repo https://github.com/kotetuco/Rust-BareMetal-GBA-Sample already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dba8e6977c4454013fd53b43af8f6688b7848eb7a7e953c80ff38bb2208e2a8f
[INFO] running `Command { std: "docker" "start" "-a" "dba8e6977c4454013fd53b43af8f6688b7848eb7a7e953c80ff38bb2208e2a8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dba8e6977c4454013fd53b43af8f6688b7848eb7a7e953c80ff38bb2208e2a8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dba8e6977c4454013fd53b43af8f6688b7848eb7a7e953c80ff38bb2208e2a8f", kill_on_drop: false }`
[INFO] [stdout] dba8e6977c4454013fd53b43af8f6688b7848eb7a7e953c80ff38bb2208e2a8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4d82dd07822749e62b9603560710028bf81a384cb6bc91ffeca8dc2f0dce40e
[INFO] running `Command { std: "docker" "start" "-a" "c4d82dd07822749e62b9603560710028bf81a384cb6bc91ffeca8dc2f0dce40e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-basemetal-gba v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(lang_items)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/graphics.rs:92:39
[INFO] [stdout]    |
[INFO] [stdout] 92 |             self.draw_char(character, (x + offset_x), y, color);
[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 method argument
[INFO] [stdout]   --> src/lib.rs:30:26
[INFO] [stdout]    |
[INFO] [stdout] 30 |                          (radius + 1),
[INFO] [stdout]    |                          ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stdout]   --> src/lib.rs:51:1
[INFO] [stdout]    |
[INFO] [stdout] 51 | #[lang = "panic_fmt"]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `panic_fmt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-basemetal-gba` due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] error: aborting due to 3 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0522, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0522`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c4d82dd07822749e62b9603560710028bf81a384cb6bc91ffeca8dc2f0dce40e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d82dd07822749e62b9603560710028bf81a384cb6bc91ffeca8dc2f0dce40e", kill_on_drop: false }`
[INFO] [stdout] c4d82dd07822749e62b9603560710028bf81a384cb6bc91ffeca8dc2f0dce40e