[INFO] fetching crate uklid 0.3.0...
[INFO] testing uklid-0.3.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate uklid 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate uklid 0.3.0
[INFO] finished tweaking crates.io crate uklid 0.3.0
[INFO] tweaked toml for crates.io crate uklid 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate uklid 0.3.0 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] crate crates.io crate uklid 0.3.0 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] 7238dc5c1bf30add061cb33f16c5a140885c8f4ce25e5e1d4a78451638344674
[INFO] running `Command { std: "docker" "start" "-a" "7238dc5c1bf30add061cb33f16c5a140885c8f4ce25e5e1d4a78451638344674", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7238dc5c1bf30add061cb33f16c5a140885c8f4ce25e5e1d4a78451638344674", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7238dc5c1bf30add061cb33f16c5a140885c8f4ce25e5e1d4a78451638344674", kill_on_drop: false }`
[INFO] [stdout] 7238dc5c1bf30add061cb33f16c5a140885c8f4ce25e5e1d4a78451638344674
[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] a157710ca8ed67936646d28e2e6c02f54faca735cbcffae128210f41ebbbe56a
[INFO] running `Command { std: "docker" "start" "-a" "a157710ca8ed67936646d28e2e6c02f54faca735cbcffae128210f41ebbbe56a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.124
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling predicates-core v1.0.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling termtree v0.2.4
[INFO] [stderr]    Compiling fastrand v1.7.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling predicates-tree v1.0.5
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling zeroize v1.5.4
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling filesize v0.2.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]    Compiling clap_lex v0.1.1
[INFO] [stderr]    Compiling human_bytes v0.3.1
[INFO] [stderr]    Compiling home v0.5.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling nix v0.21.2
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling nix v0.23.1
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling shellexpand v2.1.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]    Compiling chrono-humanize v0.2.1
[INFO] [stderr]    Compiling globset v0.4.8
[INFO] [stderr]    Compiling predicates v2.1.1
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling assert_cmd v2.0.4
[INFO] [stderr]    Compiling dialoguer v0.10.0
[INFO] [stderr]    Compiling ignore v0.4.18
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling strum_macros v0.24.0
[INFO] [stderr]    Compiling clap_derive v3.1.7
[INFO] [stderr]    Compiling globwalk v0.8.1
[INFO] [stderr]    Compiling ptyprocess v0.3.0
[INFO] [stderr]    Compiling assert_fs v1.0.7
[INFO] [stderr]    Compiling strum v0.24.0
[INFO] [stderr]    Compiling expectrl v0.3.0
[INFO] [stderr]    Compiling clap v3.1.12
[INFO] [stderr]    Compiling spinners v4.0.0
[INFO] [stderr]    Compiling uklid v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(path_try_exists)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `path_try_exists` has been stable since 1.63.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(path_try_exists)]
[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 `uklid` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a157710ca8ed67936646d28e2e6c02f54faca735cbcffae128210f41ebbbe56a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a157710ca8ed67936646d28e2e6c02f54faca735cbcffae128210f41ebbbe56a", kill_on_drop: false }`
[INFO] [stdout] a157710ca8ed67936646d28e2e6c02f54faca735cbcffae128210f41ebbbe56a
