[INFO] fetching crate tg-rcore-tutorial-ch1-virtioblk 0.1.0-preview.1...
[INFO] testing tg-rcore-tutorial-ch1-virtioblk-0.1.0-preview.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tg-rcore-tutorial-ch1-virtioblk 0.1.0-preview.1 into /workspace/builds/worker-1-tc2/source
[INFO] removed /workspace/builds/worker-1-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-1-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate tg-rcore-tutorial-ch1-virtioblk 0.1.0-preview.1
[INFO] finished tweaking crates.io crate tg-rcore-tutorial-ch1-virtioblk 0.1.0-preview.1
[INFO] tweaked toml for crates.io crate tg-rcore-tutorial-ch1-virtioblk 0.1.0-preview.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tg-rcore-tutorial-ch1-virtioblk 0.1.0-preview.1 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-virtioblk 0.1.0-preview.1 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 2559950f4647ea0d76e0bcf79bc8703c0dba3e735b3efa05e90730b1237853f6
[INFO] running `Command { std: "docker" "start" "-a" "2559950f4647ea0d76e0bcf79bc8703c0dba3e735b3efa05e90730b1237853f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2559950f4647ea0d76e0bcf79bc8703c0dba3e735b3efa05e90730b1237853f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2559950f4647ea0d76e0bcf79bc8703c0dba3e735b3efa05e90730b1237853f6", kill_on_drop: false }`
[INFO] [stdout] 2559950f4647ea0d76e0bcf79bc8703c0dba3e735b3efa05e90730b1237853f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 91dc71ace34f647d17671d3b99f014629165236d5f7dea8335fd630da1902f6f
[INFO] running `Command { std: "docker" "start" "-a" "91dc71ace34f647d17671d3b99f014629165236d5f7dea8335fd630da1902f6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling tg-rcore-tutorial-ch1-virtioblk v0.1.0-preview.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling tg-rcore-tutorial-sbi v0.4.8
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "91dc71ace34f647d17671d3b99f014629165236d5f7dea8335fd630da1902f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91dc71ace34f647d17671d3b99f014629165236d5f7dea8335fd630da1902f6f", kill_on_drop: false }`
[INFO] [stdout] 91dc71ace34f647d17671d3b99f014629165236d5f7dea8335fd630da1902f6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43dade959d49615d6713be118b599dda84f3e79dd2eb8011fef75633450cbdb8
[INFO] running `Command { std: "docker" "start" "-a" "43dade959d49615d6713be118b599dda84f3e79dd2eb8011fef75633450cbdb8", kill_on_drop: false }`
[INFO] [stderr]    Compiling tg-rcore-tutorial-sbi v0.4.8
[INFO] [stderr]    Compiling tg-rcore-tutorial-ch1-virtioblk v0.1.0-preview.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]    --> src/main.rs:218:1
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn panic(_: &core::panic::PanicInfo) -> ! { shutdown(true) }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]     = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.so, /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.rlib, /opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-0b731ea8964f0f7c.rmeta
[INFO] [stdout]     = note: second definition in the local crate (`tg_rcore_tutorial_ch1_virtioblk`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tg-rcore-tutorial-ch1-virtioblk` (bin "tg-rcore-tutorial-ch1-virtioblk" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "43dade959d49615d6713be118b599dda84f3e79dd2eb8011fef75633450cbdb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43dade959d49615d6713be118b599dda84f3e79dd2eb8011fef75633450cbdb8", kill_on_drop: false }`
[INFO] [stdout] 43dade959d49615d6713be118b599dda84f3e79dd2eb8011fef75633450cbdb8
