[INFO] fetching crate rhex 0.1.0...
[INFO] testing rhex-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rhex 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate rhex 0.1.0
[INFO] finished tweaking crates.io crate rhex 0.1.0
[INFO] tweaked toml for crates.io crate rhex 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rhex 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding ncurses v5.101.0 (available: v6.0.1)
[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] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[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] e82d36ad0f7b5b0ab4c81ae0ab71608b68ef8503ed17c402145fa0623848da66
[INFO] running `Command { std: "docker" "start" "-a" "e82d36ad0f7b5b0ab4c81ae0ab71608b68ef8503ed17c402145fa0623848da66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e82d36ad0f7b5b0ab4c81ae0ab71608b68ef8503ed17c402145fa0623848da66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e82d36ad0f7b5b0ab4c81ae0ab71608b68ef8503ed17c402145fa0623848da66", kill_on_drop: false }`
[INFO] [stdout] e82d36ad0f7b5b0ab4c81ae0ab71608b68ef8503ed17c402145fa0623848da66
[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] da6ddd79425979075b18c1b541b758e15e0c8b3abdf3d5e9e1a2b4bdc22d9b02
[INFO] running `Command { std: "docker" "start" "-a" "da6ddd79425979075b18c1b541b758e15e0c8b3abdf3d5e9e1a2b4bdc22d9b02", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling find-msvc-tools v0.1.9
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling pkg-config v0.3.33
[INFO] [stderr]    Compiling cc v1.2.61
[INFO] [stderr]    Compiling ncurses v5.101.0
[INFO] [stderr]    Compiling rhex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `alloc_system`
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate alloc_system;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rhex` (bin "rhex") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "da6ddd79425979075b18c1b541b758e15e0c8b3abdf3d5e9e1a2b4bdc22d9b02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da6ddd79425979075b18c1b541b758e15e0c8b3abdf3d5e9e1a2b4bdc22d9b02", kill_on_drop: false }`
[INFO] [stdout] da6ddd79425979075b18c1b541b758e15e0c8b3abdf3d5e9e1a2b4bdc22d9b02
