[INFO] fetching crate motus 0.2.0...
[INFO] testing motus-0.2.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate motus 0.2.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate motus 0.2.0
[INFO] finished tweaking crates.io crate motus 0.2.0
[INFO] tweaked toml for crates.io crate motus 0.2.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate motus 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] crate crates.io crate motus 0.2.0 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.163
[INFO] [stderr]   Downloaded quote v1.0.27
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 23e797537b27e68cb2f2ed144259a6fa2a60bffbd5f82254ab063e9b69f4a567
[INFO] running `Command { std: "docker" "start" "-a" "23e797537b27e68cb2f2ed144259a6fa2a60bffbd5f82254ab063e9b69f4a567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23e797537b27e68cb2f2ed144259a6fa2a60bffbd5f82254ab063e9b69f4a567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23e797537b27e68cb2f2ed144259a6fa2a60bffbd5f82254ab063e9b69f4a567", kill_on_drop: false }`
[INFO] [stdout] 23e797537b27e68cb2f2ed144259a6fa2a60bffbd5f82254ab063e9b69f4a567
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 39957c6ec9d8fabc18ed04565add399c6d104b967eaf4a4fd0e919aaa0e96336
[INFO] running `Command { std: "docker" "start" "-a" "39957c6ec9d8fabc18ed04565add399c6d104b967eaf4a4fd0e919aaa0e96336", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling simd-adler32 v0.3.5
[INFO] [stderr]    Compiling linux-raw-sys v0.3.7
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling anstyle-parse v0.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.7.1
[INFO] [stderr]    Compiling aho-corasick v1.0.1
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling regex-syntax v0.7.1
[INFO] [stderr]    Compiling anstyle v1.0.0
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling nix v0.24.3
[INFO] [stderr]    Compiling flate2 v1.0.26
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]    Compiling fdeflate v0.3.0
[INFO] [stderr]    Compiling gimli v0.27.2
[INFO] [stderr]    Compiling regex v1.8.1
[INFO] [stderr]    Compiling clap_lex v0.4.1
[INFO] [stderr]    Compiling is-terminal v0.4.7
[INFO] [stderr]    Compiling winnow v0.4.6
[INFO] [stderr]    Compiling anstream v0.3.2
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling clap_builder v4.2.7
[INFO] [stderr]    Compiling darling_core v0.14.4
[INFO] [stderr]    Compiling serde_derive v1.0.163
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling clap_derive v4.2.0
[INFO] [stderr]    Compiling x11rb-protocol v0.10.0
[INFO] [stderr]    Compiling addr2line v0.19.0
[INFO] [stderr]    Compiling png v0.17.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling gethostname v0.2.3
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling object v0.30.3
[INFO] [stderr]    Compiling darling v0.14.4
[INFO] [stderr]    Compiling derive_builder_core v0.12.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.23
[INFO] [stderr]    Compiling bytemuck v1.13.1
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling image v0.24.6
[INFO] [stderr]    Compiling clap v4.2.7
[INFO] [stderr]    Compiling time v0.3.21
[INFO] [stderr]    Compiling derive_builder_macro v0.12.0
[INFO] [stderr]    Compiling derive_builder v0.12.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling fancy-regex v0.11.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling uuid v1.3.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling zxcvbn v2.2.2
[INFO] [stderr]    Compiling term-table v1.3.2
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling clap_complete v4.2.3
[INFO] [stderr]    Compiling serde_spanned v0.6.1
[INFO] [stderr]    Compiling toml_datetime v0.6.1
[INFO] [stderr]    Compiling os_info v3.7.0
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling toml_edit v0.19.8
[INFO] [stderr]    Compiling x11rb v0.10.1
[INFO] [stderr]    Compiling arboard v3.2.0
[INFO] [stderr]    Compiling toml v0.7.3
[INFO] [stderr]    Compiling human-panic v1.1.4
[INFO] [stderr]    Compiling motus v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_intersperse)]
[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 `motus` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "39957c6ec9d8fabc18ed04565add399c6d104b967eaf4a4fd0e919aaa0e96336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39957c6ec9d8fabc18ed04565add399c6d104b967eaf4a4fd0e919aaa0e96336", kill_on_drop: false }`
[INFO] [stdout] 39957c6ec9d8fabc18ed04565add399c6d104b967eaf4a4fd0e919aaa0e96336