[INFO] fetching crate re 0.1.9...
[INFO] testing re-0.1.9 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate re 0.1.9 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate re 0.1.9
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate re 0.1.9
[INFO] tweaked toml for crates.io crate re 0.1.9 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate re 0.1.9 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 90 packages to latest compatible versions
[INFO] [stderr]       Adding axum v0.7.9 (available: v0.8.9)
[INFO] [stderr]       Adding prost v0.13.5 (available: v0.14.3)
[INFO] [stderr]       Adding sonic-rs v0.3.17 (available: v0.5.8)
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] aa1a3536ea11d5731d027a9198af5f26e9fe498bf2e05747f39f07f9cd3fe58a
[INFO] running `Command { std: "docker" "start" "-a" "aa1a3536ea11d5731d027a9198af5f26e9fe498bf2e05747f39f07f9cd3fe58a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa1a3536ea11d5731d027a9198af5f26e9fe498bf2e05747f39f07f9cd3fe58a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa1a3536ea11d5731d027a9198af5f26e9fe498bf2e05747f39f07f9cd3fe58a", kill_on_drop: false }`
[INFO] [stdout] aa1a3536ea11d5731d027a9198af5f26e9fe498bf2e05747f39f07f9cd3fe58a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 9be5881f20e072fb6d623fd4fe867ab6b52fb36016a129eb092f51881b68867d
[INFO] running `Command { std: "docker" "start" "-a" "9be5881f20e072fb6d623fd4fe867ab6b52fb36016a129eb092f51881b68867d", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling sonic-number v0.1.2
[INFO] [stderr]    Compiling sonic-simd v0.1.4
[INFO] [stderr]    Compiling matchit v0.7.3
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling serde_path_to_error v0.1.20
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling ref-cast-impl v1.0.25
[INFO] [stderr]    Compiling prost-derive v0.13.5
[INFO] [stderr]    Compiling ref-cast v1.0.25
[INFO] [stderr]    Compiling tokio v1.52.1
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling axum-core v0.4.5
[INFO] [stderr]    Compiling prost v0.13.5
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling faststr v0.2.34
[INFO] [stderr]    Compiling sonic-rs v0.3.17
[INFO] [stderr]    Compiling hyper v1.9.0
[INFO] [stderr]    Compiling tower v0.5.3
[INFO] [stderr]    Compiling hyper-util v0.1.20
[INFO] [stderr]    Compiling axum v0.7.9
[INFO] [stderr]    Compiling re v0.1.9 (/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(min_specialization)]
[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 `re` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9be5881f20e072fb6d623fd4fe867ab6b52fb36016a129eb092f51881b68867d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9be5881f20e072fb6d623fd4fe867ab6b52fb36016a129eb092f51881b68867d", kill_on_drop: false }`
[INFO] [stdout] 9be5881f20e072fb6d623fd4fe867ab6b52fb36016a129eb092f51881b68867d
