[INFO] fetching crate sugars_async_task 0.5.4...
[INFO] testing sugars_async_task-0.5.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate sugars_async_task 0.5.4 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate sugars_async_task 0.5.4
[INFO] finished tweaking crates.io crate sugars_async_task 0.5.4
[INFO] tweaked toml for crates.io crate sugars_async_task 0.5.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sugars_async_task 0.5.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sugars_async_task 0.5.4 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-io v0.3.31
[INFO] [stderr]   Downloaded futures-executor v0.3.31
[INFO] [stderr]   Downloaded foldhash v0.1.5
[INFO] [stderr]   Downloaded sugars_collections v0.5.5
[INFO] [stderr]   Downloaded futures v0.3.31
[INFO] [stderr]   Downloaded allocator-api2 v0.2.21
[INFO] [stderr]   Downloaded unicode-ident v1.0.20
[INFO] [stderr]   Downloaded hashbrown v0.15.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96ad5e7441e18e1b809b2027cdeb5ceeb70cada201522eca403c296230884fdf
[INFO] running `Command { std: "docker" "start" "-a" "96ad5e7441e18e1b809b2027cdeb5ceeb70cada201522eca403c296230884fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96ad5e7441e18e1b809b2027cdeb5ceeb70cada201522eca403c296230884fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96ad5e7441e18e1b809b2027cdeb5ceeb70cada201522eca403c296230884fdf", kill_on_drop: false }`
[INFO] [stdout] 96ad5e7441e18e1b809b2027cdeb5ceeb70cada201522eca403c296230884fdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c771a548798a09ae224fef93384825e6dfd1e96ba7ed07e571bf186184a9c6f6
[INFO] running `Command { std: "docker" "start" "-a" "c771a548798a09ae224fef93384825e6dfd1e96ba7ed07e571bf186184a9c6f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.20
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling pin-project-lite v0.2.16
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling slab v0.4.11
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling futures-io v0.3.31
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling allocator-api2 v0.2.21
[INFO] [stderr]    Compiling equivalent v1.0.2
[INFO] [stderr]    Compiling foldhash v0.1.5
[INFO] [stderr]    Compiling tokio v1.48.0
[INFO] [stderr]    Compiling hashbrown v0.15.5
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling sugars_collections v0.5.5
[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/sugars_collections-0.5.5/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(auto_traits, negative_impls)]
[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 `sugars_collections` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c771a548798a09ae224fef93384825e6dfd1e96ba7ed07e571bf186184a9c6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c771a548798a09ae224fef93384825e6dfd1e96ba7ed07e571bf186184a9c6f6", kill_on_drop: false }`
[INFO] [stdout] c771a548798a09ae224fef93384825e6dfd1e96ba7ed07e571bf186184a9c6f6
