[INFO] fetching crate nuit-bridge-adwaita 0.2.0...
[INFO] testing nuit-bridge-adwaita-0.2.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate nuit-bridge-adwaita 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate nuit-bridge-adwaita 0.2.0
[INFO] finished tweaking crates.io crate nuit-bridge-adwaita 0.2.0
[INFO] tweaked toml for crates.io crate nuit-bridge-adwaita 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nuit-bridge-adwaita 0.2.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 84 packages to latest compatible versions
[INFO] [stderr]       Adding libadwaita v0.7.2 (available: v0.8.0)
[INFO] [stderr]       Adding target-lexicon v0.13.2 (available: v0.13.3)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded nuit-derive v0.2.0
[INFO] [stderr]   Downloaded nuit-core v0.2.0
[INFO] [stderr]   Downloaded libadwaita-sys v0.7.2
[INFO] [stderr]   Downloaded libadwaita v0.7.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b2011ee0ae19f9d1c6ec50b9cffb30d425ce2651eee12a24ded983ee179d70af
[INFO] running `Command { std: "docker" "start" "-a" "b2011ee0ae19f9d1c6ec50b9cffb30d425ce2651eee12a24ded983ee179d70af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2011ee0ae19f9d1c6ec50b9cffb30d425ce2651eee12a24ded983ee179d70af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2011ee0ae19f9d1c6ec50b9cffb30d425ce2651eee12a24ded983ee179d70af", kill_on_drop: false }`
[INFO] [stdout] b2011ee0ae19f9d1c6ec50b9cffb30d425ce2651eee12a24ded983ee179d70af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e13be098b40c4c05bf60f402c91cedfa7626c8ac1f90c6ef330a78c8c9d58abb
[INFO] running `Command { std: "docker" "start" "-a" "e13be098b40c4c05bf60f402c91cedfa7626c8ac1f90c6ef330a78c8c9d58abb", kill_on_drop: false }`
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling hashbrown v0.16.0
[INFO] [stderr]    Compiling target-lexicon v0.13.2
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling version-compare v0.2.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling gio v0.20.12
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling ref-cast v1.0.25
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling ref-cast-impl v1.0.25
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling indexmap v2.11.4
[INFO] [stderr]    Compiling field-offset v0.3.6
[INFO] [stderr]    Compiling cfg-expr v0.20.3
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling nuit-derive v0.2.0
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling serde_spanned v0.6.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/nuit-derive-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `let_chains` has been stable since `1.88.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nuit-derive` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e13be098b40c4c05bf60f402c91cedfa7626c8ac1f90c6ef330a78c8c9d58abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e13be098b40c4c05bf60f402c91cedfa7626c8ac1f90c6ef330a78c8c9d58abb", kill_on_drop: false }`
[INFO] [stdout] e13be098b40c4c05bf60f402c91cedfa7626c8ac1f90c6ef330a78c8c9d58abb