[INFO] fetching crate t3 0.1.21...
[INFO] testing t3-0.1.21 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate t3 0.1.21 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate t3 0.1.21
[INFO] finished tweaking crates.io crate t3 0.1.21
[INFO] tweaked toml for crates.io crate t3 0.1.21 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate t3 0.1.21 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 t3 0.1.21 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-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] 22de92e1f2f096798f260db4f3f18233263e7885acf91ec8d32f2a0d313ba2e6
[INFO] running `Command { std: "docker" "start" "-a" "22de92e1f2f096798f260db4f3f18233263e7885acf91ec8d32f2a0d313ba2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22de92e1f2f096798f260db4f3f18233263e7885acf91ec8d32f2a0d313ba2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22de92e1f2f096798f260db4f3f18233263e7885acf91ec8d32f2a0d313ba2e6", kill_on_drop: false }`
[INFO] [stdout] 22de92e1f2f096798f260db4f3f18233263e7885acf91ec8d32f2a0d313ba2e6
[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] fbef5a172db3592f47b6172b906d864dd3ff77054ed84e362a76526c3456e271
[INFO] running `Command { std: "docker" "start" "-a" "fbef5a172db3592f47b6172b906d864dd3ff77054ed84e362a76526c3456e271", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling http v1.2.0
[INFO] [stderr]    Compiling serde v1.0.218
[INFO] [stderr]    Compiling log v0.4.26
[INFO] [stderr]    Compiling getrandom v0.3.1
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling rustversion v1.0.20
[INFO] [stderr]    Compiling zerocopy v0.8.21
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling jobserver v0.1.32
[INFO] [stderr]    Compiling zstd-safe v7.2.3
[INFO] [stderr]    Compiling anyhow v1.0.97
[INFO] [stderr]    Compiling percent-encoding v2.3.1
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling smallvec v1.14.0
[INFO] [stderr]    Compiling ref-cast v1.0.24
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling either v1.14.0
[INFO] [stderr]    Compiling utf-8 v0.7.6
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling data-encoding v2.8.0
[INFO] [stderr]    Compiling sonic-number v0.1.0
[INFO] [stderr]    Compiling sonic-simd v0.1.0
[INFO] [stderr]    Compiling matchit v0.7.3
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling cc v1.2.16
[INFO] [stderr]    Compiling psl-types v2.0.11
[INFO] [stderr]    Compiling bumpalo v3.17.0
[INFO] [stderr]    Compiling bitflags v2.9.0
[INFO] [stderr]    Compiling matchit v0.8.4
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling xstr v0.1.11
[INFO] [stderr]    Compiling coarsetime v0.1.36
[INFO] [stderr]    Compiling psl v2.1.90
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stderr]    Compiling zstd-sys v2.0.14+zstd.1.5.7
[INFO] [stderr]    Compiling xtld v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.218
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling ref-cast-impl v1.0.24
[INFO] [stderr]    Compiling async-trait v0.1.87
[INFO] [stderr]    Compiling prost-derive v0.13.5
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling zstd v0.13.3
[INFO] [stderr]    Compiling tokio v1.43.0
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling prost v0.13.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.0
[INFO] [stderr]    Compiling tungstenite v0.26.2
[INFO] [stderr]    Compiling http-body-util v0.1.2
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling axum-core v0.4.5
[INFO] [stderr]    Compiling axum-core v0.5.0
[INFO] [stderr]    Compiling serde_path_to_error v0.1.17
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling faststr v0.2.31
[INFO] [stderr]    Compiling sonic-rs v0.3.17
[INFO] [stderr]    Compiling hyper v1.6.0
[INFO] [stderr]    Compiling tower v0.5.2
[INFO] [stderr]    Compiling tokio-tungstenite v0.26.2
[INFO] [stderr]    Compiling tokio-util v0.7.13
[INFO] [stderr]    Compiling async-compression v0.4.20
[INFO] [stderr]    Compiling tower-http v0.6.2
[INFO] [stderr]    Compiling hyper-util v0.1.10
[INFO] [stderr]    Compiling axum v0.7.9
[INFO] [stderr]    Compiling axum v0.8.1
[INFO] [stderr]    Compiling re v0.1.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/re-0.1.9/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" "fbef5a172db3592f47b6172b906d864dd3ff77054ed84e362a76526c3456e271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbef5a172db3592f47b6172b906d864dd3ff77054ed84e362a76526c3456e271", kill_on_drop: false }`
[INFO] [stdout] fbef5a172db3592f47b6172b906d864dd3ff77054ed84e362a76526c3456e271
