[INFO] fetching crate radix50-cli 0.2.1...
[INFO] testing radix50-cli-0.2.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate radix50-cli 0.2.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate radix50-cli 0.2.1
[INFO] finished tweaking crates.io crate radix50-cli 0.2.1
[INFO] tweaked toml for crates.io crate radix50-cli 0.2.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate radix50-cli 0.2.1 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 radix50-cli 0.2.1 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 7df8240ed4372e6959f290041646c0c621fa1a8b29acc3d6f509555fed722953
[INFO] running `Command { std: "docker" "start" "-a" "7df8240ed4372e6959f290041646c0c621fa1a8b29acc3d6f509555fed722953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7df8240ed4372e6959f290041646c0c621fa1a8b29acc3d6f509555fed722953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7df8240ed4372e6959f290041646c0c621fa1a8b29acc3d6f509555fed722953", kill_on_drop: false }`
[INFO] [stdout] 7df8240ed4372e6959f290041646c0c621fa1a8b29acc3d6f509555fed722953
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a19ae9f533ca8a6308198edf2d151463ecc63d77dc2c4745ad329ac707072e19
[INFO] running `Command { std: "docker" "start" "-a" "a19ae9f533ca8a6308198edf2d151463ecc63d77dc2c4745ad329ac707072e19", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling regex-syntax v0.7.5
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling const_for v0.1.2
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling radix50 v0.2.1
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]    Compiling regex-automata v0.3.8
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling regex v1.9.5
[INFO] [stderr]    Compiling docopt v1.1.1
[INFO] [stderr]    Compiling radix50-cli v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> radix50-cli.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(iter_intersperse)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `radix50-cli` (bin "radix50") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a19ae9f533ca8a6308198edf2d151463ecc63d77dc2c4745ad329ac707072e19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a19ae9f533ca8a6308198edf2d151463ecc63d77dc2c4745ad329ac707072e19", kill_on_drop: false }`
[INFO] [stdout] a19ae9f533ca8a6308198edf2d151463ecc63d77dc2c4745ad329ac707072e19
