[INFO] fetching crate mle 0.26.1...
[INFO] testing mle-0.26.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate mle 0.26.1 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate mle 0.26.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mle 0.26.1
[INFO] tweaked toml for crates.io crate mle 0.26.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mle 0.26.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mle 0.26.1 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-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd633a4f9ca61b197b4a3f1fe5d01cc8f298168487d7ddbba218bdb49ef9f1e5
[INFO] running `Command { std: "docker" "start" "-a" "dd633a4f9ca61b197b4a3f1fe5d01cc8f298168487d7ddbba218bdb49ef9f1e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd633a4f9ca61b197b4a3f1fe5d01cc8f298168487d7ddbba218bdb49ef9f1e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd633a4f9ca61b197b4a3f1fe5d01cc8f298168487d7ddbba218bdb49ef9f1e5", kill_on_drop: false }`
[INFO] [stdout] dd633a4f9ca61b197b4a3f1fe5d01cc8f298168487d7ddbba218bdb49ef9f1e5
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34373e8eb9875360c34c54f2b77bc3bba7779e7ebe4e7cbe967312ac9d213f51
[INFO] running `Command { std: "docker" "start" "-a" "34373e8eb9875360c34c54f2b77bc3bba7779e7ebe4e7cbe967312ac9d213f51", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.2.29
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling rustix v1.0.7
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling linux-raw-sys v0.9.4
[INFO] [stderr]    Compiling futures-lite v2.6.0
[INFO] [stderr]    Compiling value-bag v1.11.1
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling piper v0.2.4
[INFO] [stderr]    Compiling rustls v0.23.29
[INFO] [stderr]    Compiling slab v0.4.10
[INFO] [stderr]    Compiling anstyle-query v1.1.3
[INFO] [stderr]    Compiling time-macros v0.2.22
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling anstream v0.6.19
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling webpki-roots v1.0.1
[INFO] [stderr]    Compiling event-listener v5.4.0
[INFO] [stderr]    Compiling log v0.4.27
[INFO] [stderr]    Compiling iri-string v0.7.8
[INFO] [stderr]    Compiling event-listener v2.5.3
[INFO] [stderr]    Compiling pulldown-cmark v0.13.0
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling event-listener-strategy v0.5.4
[INFO] [stderr]    Compiling async-channel v1.9.0
[INFO] [stderr]    Compiling const_format_proc_macros v0.2.34
[INFO] [stderr]    Compiling csv-core v0.1.12
[INFO] [stderr]    Compiling async-channel v2.5.0
[INFO] [stderr]    Compiling async-lock v3.4.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling async-executor v1.13.2
[INFO] [stderr]    Compiling env_filter v0.1.3
[INFO] [stderr]    Compiling blocking v1.6.2
[INFO] [stderr]    Compiling env_logger v0.11.8
[INFO] [stderr]    Compiling async-fs v2.1.2
[INFO] [stderr]    Compiling time v0.3.41
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling const_format v0.2.34
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling simplelog v0.12.2
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.0
[INFO] [stderr]    Compiling zerovec-derive v0.11.1
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling git-version-macro v0.3.9
[INFO] [stderr]    Compiling tokio v1.46.1
[INFO] [stderr]    Compiling git-version v0.3.9
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling yoke v0.8.0
[INFO] [stderr]    Compiling zerotrie v0.2.2
[INFO] [stderr]    Compiling zerovec v0.11.2
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling async-walkdir v2.1.0
[INFO] [stderr]    Compiling polling v3.8.0
[INFO] [stderr]    Compiling terminal_size v0.4.2
[INFO] [stderr]    Compiling clap_builder v4.5.41
[INFO] [stderr]    Compiling tinystr v0.8.1
[INFO] [stderr]    Compiling potential_utf v0.1.2
[INFO] [stderr]    Compiling async-io v2.4.1
[INFO] [stderr]    Compiling icu_collections v2.0.0
[INFO] [stderr]    Compiling rustls-webpki v0.103.4
[INFO] [stderr]    Compiling icu_locale_core v2.0.0
[INFO] [stderr]    Compiling async-global-executor v2.4.1
[INFO] [stderr]    Compiling async-std v1.13.1
[INFO] [stderr]    Compiling icu_provider v2.0.0
[INFO] [stderr]    Compiling icu_properties v2.0.1
[INFO] [stderr]    Compiling icu_normalizer v2.0.0
[INFO] [stderr]    Compiling clap v4.5.41
[INFO] [stderr]    Compiling hyper v1.6.0
[INFO] [stderr]    Compiling tower v0.5.2
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.0.3
[INFO] [stderr]    Compiling tower-http v0.6.6
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling url v2.5.4
[INFO] [stderr]    Compiling serde_regex v1.1.0
[INFO] [stderr]    Compiling wildmatch v2.4.0
[INFO] [stderr]    Compiling relative-path v1.9.3
[INFO] [stderr]    Compiling csv v1.3.1
[INFO] [stderr]    Compiling hyper-util v0.1.15
[INFO] [stderr]    Compiling tokio-rustls v0.26.2
[INFO] [stderr]    Compiling hyper-rustls v0.27.7
[INFO] [stderr]    Compiling reqwest v0.12.22
[INFO] [stderr]    Compiling mle v0.26.1 (/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(type_alias_impl_trait)]
[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 `mle` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "34373e8eb9875360c34c54f2b77bc3bba7779e7ebe4e7cbe967312ac9d213f51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34373e8eb9875360c34c54f2b77bc3bba7779e7ebe4e7cbe967312ac9d213f51", kill_on_drop: false }`
[INFO] [stdout] 34373e8eb9875360c34c54f2b77bc3bba7779e7ebe4e7cbe967312ac9d213f51