[INFO] fetching crate saturation 0.2.3...
[INFO] testing saturation-0.2.3 against 1.91.0 for beta-1.92-2
[INFO] extracting crate saturation 0.2.3 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate saturation 0.2.3
[INFO] finished tweaking crates.io crate saturation 0.2.3
[INFO] tweaked toml for crates.io crate saturation 0.2.3 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate saturation 0.2.3 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 saturation 0.2.3 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded moddef v0.3.0
[INFO] [stderr]   Downloaded array_trait v1.1.4
[INFO] [stderr]   Downloaded numscale v0.1.0
[INFO] [stderr]   Downloaded slice_trait v0.2.5
[INFO] [stderr]   Downloaded linspace v0.2.3
[INFO] [stderr]   Downloaded float-ord v0.3.2
[INFO] [stderr]   Downloaded dwrote v0.11.3
[INFO] [stderr]   Downloaded pathfinder_simd v0.5.4
[INFO] [stderr]   Downloaded real_time_fir_iir_filters v1.4.3
[INFO] [stderr]   Downloaded plotters-bitmap v0.3.7
[INFO] [stderr]   Downloaded font-kit v0.14.2
[INFO] [stderr]   Downloaded gif v0.12.0
[INFO] [stderr]   Downloaded freetype-sys v0.20.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 618c1deea75fd37366b37efe31493d9529566a17ddbf91d5bb73ea7ed463a3b5
[INFO] running `Command { std: "docker" "start" "-a" "618c1deea75fd37366b37efe31493d9529566a17ddbf91d5bb73ea7ed463a3b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "618c1deea75fd37366b37efe31493d9529566a17ddbf91d5bb73ea7ed463a3b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "618c1deea75fd37366b37efe31493d9529566a17ddbf91d5bb73ea7ed463a3b5", kill_on_drop: false }`
[INFO] [stdout] 618c1deea75fd37366b37efe31493d9529566a17ddbf91d5bb73ea7ed463a3b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ef79de6d28a9b803587cb9283437609eee79c150bcaaca9e494f6ba419e22cf8
[INFO] running `Command { std: "docker" "start" "-a" "ef79de6d28a9b803587cb9283437609eee79c150bcaaca9e494f6ba419e22cf8", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling moddef v0.3.0
[INFO] [stderr]    Compiling slice_trait v0.2.5
[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/slice_trait-0.2.5/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/slice_trait-0.2.5/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_trait_impl)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/slice_trait-0.2.5/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(ptr_metadata)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/slice_trait-0.2.5/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(const_index)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/slice_trait-0.2.5/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(const_convert)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/slice_trait-0.2.5/src/lib.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(feature = "alloc", feature(allocator_api))]
[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 `slice_trait` (lib) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ef79de6d28a9b803587cb9283437609eee79c150bcaaca9e494f6ba419e22cf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef79de6d28a9b803587cb9283437609eee79c150bcaaca9e494f6ba419e22cf8", kill_on_drop: false }`
[INFO] [stdout] ef79de6d28a9b803587cb9283437609eee79c150bcaaca9e494f6ba419e22cf8