[INFO] fetching crate tg-rcore-tutorial-ch1-uart-clock 0.1.0-preview.3...
[INFO] testing tg-rcore-tutorial-ch1-uart-clock-0.1.0-preview.3 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tg-rcore-tutorial-ch1-uart-clock 0.1.0-preview.3 into /workspace/builds/worker-4-tc2/source
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate tg-rcore-tutorial-ch1-uart-clock 0.1.0-preview.3
[INFO] finished tweaking crates.io crate tg-rcore-tutorial-ch1-uart-clock 0.1.0-preview.3
[INFO] tweaked toml for crates.io crate tg-rcore-tutorial-ch1-uart-clock 0.1.0-preview.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tg-rcore-tutorial-ch1-uart-clock 0.1.0-preview.3 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tg-rcore-tutorial-ch1-uart-clock 0.1.0-preview.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07d894ccd05ef5add978a92ef5524450af016681bfe64f7402ebeb53720b88e9
[INFO] running `Command { std: "docker" "start" "-a" "07d894ccd05ef5add978a92ef5524450af016681bfe64f7402ebeb53720b88e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07d894ccd05ef5add978a92ef5524450af016681bfe64f7402ebeb53720b88e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07d894ccd05ef5add978a92ef5524450af016681bfe64f7402ebeb53720b88e9", kill_on_drop: false }`
[INFO] [stdout] 07d894ccd05ef5add978a92ef5524450af016681bfe64f7402ebeb53720b88e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a8b7c58e8577c676a91662cde5ba1300137ae46bace9ace56cb8369c1bcdefe
[INFO] running `Command { std: "docker" "start" "-a" "2a8b7c58e8577c676a91662cde5ba1300137ae46bace9ace56cb8369c1bcdefe", kill_on_drop: false }`
[INFO] [stderr]    Compiling tg-rcore-tutorial-ch1-uart-clock v0.1.0-preview.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: invalid register `a0`: unknown register
[INFO] [stdout]   --> src/trap.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             in("a0") next_time,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: invalid register `a7`: unknown register
[INFO] [stdout]   --> src/trap.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             in("a7") 0usize,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tg-rcore-tutorial-ch1-uart-clock` (bin "tg-rcore-tutorial-ch1-uart-clock") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2a8b7c58e8577c676a91662cde5ba1300137ae46bace9ace56cb8369c1bcdefe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a8b7c58e8577c676a91662cde5ba1300137ae46bace9ace56cb8369c1bcdefe", kill_on_drop: false }`
[INFO] [stdout] 2a8b7c58e8577c676a91662cde5ba1300137ae46bace9ace56cb8369c1bcdefe
