[INFO] fetching crate rustc-ap-rustc_cratesio_shim 520.0.0...
[INFO] testing rustc-ap-rustc_cratesio_shim-520.0.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate rustc-ap-rustc_cratesio_shim 520.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rustc-ap-rustc_cratesio_shim 520.0.0
[INFO] finished tweaking crates.io crate rustc-ap-rustc_cratesio_shim 520.0.0
[INFO] tweaked toml for crates.io crate rustc-ap-rustc_cratesio_shim 520.0.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustc-ap-rustc_cratesio_shim 520.0.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.10.0)
[INFO] [stderr]       Adding unicode-width v0.1.14 (available: v0.2.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c793504841f27a33c36367f6641a538370d2c4566931d6d4a5bba5d774d2c8a9
[INFO] running `Command { std: "docker" "start" "-a" "c793504841f27a33c36367f6641a538370d2c4566931d6d4a5bba5d774d2c8a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c793504841f27a33c36367f6641a538370d2c4566931d6d4a5bba5d774d2c8a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c793504841f27a33c36367f6641a538370d2c4566931d6d4a5bba5d774d2c8a9", kill_on_drop: false }`
[INFO] [stdout] c793504841f27a33c36367f6641a538370d2c4566931d6d4a5bba5d774d2c8a9
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2dda4be1d44c61012762db61c1f84738c79199677615935cdfeb5414a8f83858
[INFO] running `Command { std: "docker" "start" "-a" "2dda4be1d44c61012762db61c1f84738c79199677615935cdfeb5414a8f83858", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling rustc-ap-rustc_cratesio_shim v520.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `nll` has been stable since `1.63.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `nll` has been stable since 1.63.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(nll)]
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-ap-rustc_cratesio_shim` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "2dda4be1d44c61012762db61c1f84738c79199677615935cdfeb5414a8f83858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dda4be1d44c61012762db61c1f84738c79199677615935cdfeb5414a8f83858", kill_on_drop: false }`
[INFO] [stdout] 2dda4be1d44c61012762db61c1f84738c79199677615935cdfeb5414a8f83858
