[INFO] fetching crate refs 0.53.0...
[INFO] testing refs-0.53.0 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate refs 0.53.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate refs 0.53.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate refs 0.53.0
[INFO] tweaked toml for crates.io crate refs 0.53.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate refs 0.53.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate refs 0.53.0 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-test-shared v0.2.123
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.73
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.73
[INFO] [stderr]   Downloaded minicov v0.3.8
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.73
[INFO] [stderr]   Downloaded value-bag v1.12.0
[INFO] [stderr]   Downloaded web-sys v0.3.100
[INFO] [stderr]   Downloaded hreads v0.14.0
[INFO] [stderr]   Downloaded plat v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9
[INFO] running `Command { std: "docker" "start" "6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling futures-sink v0.3.32
[INFO] [stderr]    Compiling memchr v2.8.1
[INFO] [stderr]    Compiling aws-lc-rs v1.17.0
[INFO] [stderr]    Compiling writeable v0.6.3
[INFO] [stderr]    Compiling litemap v0.8.2
[INFO] [stderr]    Compiling bitflags v2.13.0
[INFO] [stderr]    Compiling fastrand v2.4.1
[INFO] [stderr]    Compiling http v1.4.2
[INFO] [stderr]    Compiling rustls-pki-types v1.14.1
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling linux-raw-sys v0.12.1
[INFO] [stderr]    Compiling value-bag v1.12.0
[INFO] [stderr]    Compiling futures-channel v0.3.32
[INFO] [stderr]    Compiling rustls v0.23.40
[INFO] [stderr]    Compiling async-io v2.6.0
[INFO] [stderr]    Compiling plat v0.8.0
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]    Compiling hreads v0.14.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling log v0.4.32
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling piper v0.2.5
[INFO] [stderr]    Compiling pollster v0.4.0
[INFO] [stderr]    Compiling rustc-hash v2.1.2
[INFO] [stderr]    Compiling rustls-native-certs v0.8.4
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling http-body-util v0.1.3
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling event-listener v5.4.1
[INFO] [stderr]    Compiling async-channel v1.9.0
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling mio v1.2.1
[INFO] [stderr]    Compiling socket2 v0.6.4
[INFO] [stderr]    Compiling event-listener-strategy v0.5.4
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling async-channel v2.5.0
[INFO] [stderr]    Compiling async-lock v3.4.2
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling cc v1.2.63
[INFO] [stderr]    Compiling async-executor v1.14.0
[INFO] [stderr]    Compiling blocking v1.6.2
[INFO] [stderr]    Compiling cmake v0.1.58
[INFO] [stderr]    Compiling aws-lc-sys v0.41.0
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling zerovec-derive v0.11.3
[INFO] [stderr]    Compiling displaydoc v0.2.6
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling zerofrom-derive v0.1.7
[INFO] [stderr]    Compiling yoke-derive v0.8.2
[INFO] [stderr]    Compiling tokio v1.52.3
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling zerofrom v0.1.8
[INFO] [stderr]    Compiling yoke v0.8.3
[INFO] [stderr]    Compiling zerovec v0.11.6
[INFO] [stderr]    Compiling zerotrie v0.2.4
[INFO] [stderr]    Compiling tinystr v0.8.3
[INFO] [stderr]    Compiling potential_utf v0.1.5
[INFO] [stderr]    Compiling icu_collections v2.2.0
[INFO] [stderr]    Compiling icu_locale_core v2.2.0
[INFO] [stderr]    Compiling polling v3.11.0
[INFO] [stderr]    Compiling icu_provider v2.2.0
[INFO] [stderr]    Compiling futures-executor v0.3.32
[INFO] [stderr]    Compiling icu_normalizer v2.2.0
[INFO] [stderr]    Compiling icu_properties v2.2.0
[INFO] [stderr]    Compiling futures v0.3.32
[INFO] [stderr]    Compiling async-global-executor v2.4.1
[INFO] [stderr]    Compiling async-std v1.13.2
[INFO] [stderr]    Compiling idna_adapter v1.2.2
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling hyper v1.10.1
[INFO] [stderr]    Compiling tower v0.5.3
[INFO] [stderr]    Compiling url v2.5.8
[INFO] [stderr]    Compiling tower-http v0.6.11
[INFO] [stderr]    Compiling hyper-util v0.1.20
[INFO] [stderr]    Compiling rustls-webpki v0.103.13
[INFO] [stderr]    Compiling tokio-rustls v0.26.4
[INFO] [stderr]    Compiling rustls-platform-verifier v0.7.0
[INFO] [stderr]    Compiling hyper-rustls v0.27.9
[INFO] [stderr]    Compiling reqwest v0.13.4
[INFO] [stderr]    Compiling refs v0.53.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(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 `refs` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9", kill_on_drop: false }`
[INFO] [stdout] 6405bacb90ba09243ca48653e28bb49eea15a138a487ad126fecdcfb1991e3e9
