[INFO] fetching crate xkv 0.1.49...
[INFO] testing xkv-0.1.49 against 1.90.0 for beta-1.91-3
[INFO] extracting crate xkv 0.1.49 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate xkv 0.1.49
[INFO] finished tweaking crates.io crate xkv 0.1.49
[INFO] tweaked toml for crates.io crate xkv 0.1.49 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate xkv 0.1.49 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate xkv 0.1.49 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded addr2line v0.25.1
[INFO] [stderr]   Downloaded xboot v0.1.28
[INFO] [stderr]   Downloaded gensym v0.1.1
[INFO] [stderr]   Downloaded linkme-impl v0.3.35
[INFO] [stderr]   Downloaded static_ v0.1.14
[INFO] [stderr]   Downloaded linkme v0.3.35
[INFO] [stderr]   Downloaded fred-macros v0.1.0
[INFO] [stderr]   Downloaded urlencoding v2.1.3
[INFO] [stderr]   Downloaded aok v0.1.17
[INFO] [stderr]   Downloaded bytes-utils v0.1.4
[INFO] [stderr]   Downloaded float-cmp v0.10.0
[INFO] [stderr]   Downloaded async-trait v0.1.89
[INFO] [stderr]   Downloaded semver v1.0.27
[INFO] [stderr]   Downloaded socket2 v0.5.10
[INFO] [stderr]   Downloaded wit-bindgen v0.46.0
[INFO] [stderr]   Downloaded arc-swap v1.7.1
[INFO] [stderr]   Downloaded gimli v0.32.3
[INFO] [stderr]   Downloaded object v0.37.3
[INFO] [stderr]   Downloaded redis-protocol v6.0.0
[INFO] [stderr]   Downloaded rustls-webpki v0.103.6
[INFO] [stderr]   Downloaded backtrace v0.3.76
[INFO] [stderr]   Downloaded wasip2 v1.0.1+wasi-0.2.4
[INFO] [stderr]   Downloaded cookie-factory v0.3.2
[INFO] [stderr]   Downloaded rustls v0.23.32
[INFO] [stderr]   Downloaded wasi v0.14.7+wasi-0.2.4
[INFO] [stderr]   Downloaded tokio-stream v0.1.17
[INFO] [stderr]   Downloaded fred v10.1.0
[INFO] [stderr]   Downloaded crc16 v0.4.0
[INFO] [stderr]   Downloaded sha-1 v0.10.1
[INFO] [stderr]   Downloaded async_wrap v0.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72e66fabc7f75e0bb1b19f5ec371199df05b49be8fa4d2806cd78f248f7a04e8
[INFO] running `Command { std: "docker" "start" "-a" "72e66fabc7f75e0bb1b19f5ec371199df05b49be8fa4d2806cd78f248f7a04e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72e66fabc7f75e0bb1b19f5ec371199df05b49be8fa4d2806cd78f248f7a04e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72e66fabc7f75e0bb1b19f5ec371199df05b49be8fa4d2806cd78f248f7a04e8", kill_on_drop: false }`
[INFO] [stdout] 72e66fabc7f75e0bb1b19f5ec371199df05b49be8fa4d2806cd78f248f7a04e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9fa755d3eef2bd9d2bcaa5e752da72b0a131720fe32a79c7b4115f042024fd2
[INFO] running `Command { std: "docker" "start" "-a" "c9fa755d3eef2bd9d2bcaa5e752da72b0a131720fe32a79c7b4115f042024fd2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling writeable v0.6.1
[INFO] [stderr]    Compiling cfg-if v1.0.3
[INFO] [stderr]    Compiling litemap v0.8.0
[INFO] [stderr]    Compiling typenum v1.18.0
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling icu_properties_data v2.0.1
[INFO] [stderr]    Compiling icu_normalizer_data v2.0.0
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling slab v0.4.11
[INFO] [stderr]    Compiling zeroize v1.8.1
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling rustls-pki-types v1.12.0
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling linkme-impl v0.3.35
[INFO] [stderr]    Compiling utf8_iter v1.0.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling rustls v0.23.32
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]    Compiling untrusted v0.9.0
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling rustls-webpki v0.103.6
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling bytes-utils v0.1.4
[INFO] [stderr]    Compiling cookie-factory v0.3.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling linkme v0.3.35
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling float-cmp v0.10.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling sha-1 v0.10.1
[INFO] [stderr]    Compiling parking_lot v0.12.4
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling urlencoding v2.1.3
[INFO] [stderr]    Compiling arc-swap v1.7.1
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling aok v0.1.17
[INFO] [stderr]    Compiling redis-protocol v6.0.0
[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 tokio-macros v2.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling fred-macros v0.1.0
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling yoke v0.8.0
[INFO] [stderr]    Compiling zerovec v0.11.4
[INFO] [stderr]    Compiling zerotrie v0.2.2
[INFO] [stderr]    Compiling tinystr v0.8.1
[INFO] [stderr]    Compiling potential_utf v0.1.3
[INFO] [stderr]    Compiling icu_collections v2.0.0
[INFO] [stderr]    Compiling icu_locale_core v2.0.0
[INFO] [stderr]    Compiling icu_provider v2.0.0
[INFO] [stderr]    Compiling tokio-util v0.7.16
[INFO] [stderr]    Compiling tokio-stream v0.1.17
[INFO] [stderr]    Compiling icu_normalizer v2.0.0
[INFO] [stderr]    Compiling icu_properties v2.0.1
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling url v2.5.7
[INFO] [stderr]    Compiling fred v10.1.0
[INFO] [stderr]    Compiling xkv v0.1.49 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(doc_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(macro_metavar_expr)]
[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 `xkv` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c9fa755d3eef2bd9d2bcaa5e752da72b0a131720fe32a79c7b4115f042024fd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9fa755d3eef2bd9d2bcaa5e752da72b0a131720fe32a79c7b4115f042024fd2", kill_on_drop: false }`
[INFO] [stdout] c9fa755d3eef2bd9d2bcaa5e752da72b0a131720fe32a79c7b4115f042024fd2