[INFO] fetching crate scors 0.2.3...
[INFO] testing scors-0.2.3 against 1.91.0 for beta-1.92-2
[INFO] extracting crate scors 0.2.3 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate scors 0.2.3
[INFO] finished tweaking crates.io crate scors 0.2.3
[INFO] tweaked toml for crates.io crate scors 0.2.3 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate scors 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 scors 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]  Downloading crates ...
[INFO] [stderr]   Downloaded pyo3-build-config v0.23.5
[INFO] [stderr]   Downloaded pyo3-macros v0.23.5
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.23.5
[INFO] [stderr]   Downloaded numpy v0.23.0
[INFO] [stderr]   Downloaded pyo3-ffi v0.23.5
[INFO] [stderr]   Downloaded proc-macro2 v1.0.96
[INFO] [stderr]   Downloaded pyo3 v0.23.5
[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] f40f26b377a495e8019c77fe1a4d4254594e15ff4025d0b6d97538a0f90f6bdc
[INFO] running `Command { std: "docker" "start" "-a" "f40f26b377a495e8019c77fe1a4d4254594e15ff4025d0b6d97538a0f90f6bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f40f26b377a495e8019c77fe1a4d4254594e15ff4025d0b6d97538a0f90f6bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f40f26b377a495e8019c77fe1a4d4254594e15ff4025d0b6d97538a0f90f6bdc", kill_on_drop: false }`
[INFO] [stdout] f40f26b377a495e8019c77fe1a4d4254594e15ff4025d0b6d97538a0f90f6bdc
[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] ef5c05e44e5c71bef3b543df2b0d61c207f62ed7f02bb4c629683d07ebc8e1a0
[INFO] running `Command { std: "docker" "start" "-a" "ef5c05e44e5c71bef3b543df2b0d61c207f62ed7f02bb4c629683d07ebc8e1a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.96
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling indoc v2.0.6
[INFO] [stderr]    Compiling unindent v0.2.4
[INFO] [stderr]    Compiling rustc-hash v2.1.1
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling ndarray v0.16.1
[INFO] [stderr]    Compiling pyo3-build-config v0.23.5
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling num v0.4.3
[INFO] [stderr]    Compiling pyo3-ffi v0.23.5
[INFO] [stderr]    Compiling pyo3-macros-backend v0.23.5
[INFO] [stderr]    Compiling pyo3 v0.23.5
[INFO] [stderr]    Compiling pyo3-macros v0.23.5
[INFO] [stderr]    Compiling numpy v0.23.0
[INFO] [stderr]    Compiling scors v0.2.3 (/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(trait_alias)]
[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 `scors` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ef5c05e44e5c71bef3b543df2b0d61c207f62ed7f02bb4c629683d07ebc8e1a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef5c05e44e5c71bef3b543df2b0d61c207f62ed7f02bb4c629683d07ebc8e1a0", kill_on_drop: false }`
[INFO] [stdout] ef5c05e44e5c71bef3b543df2b0d61c207f62ed7f02bb4c629683d07ebc8e1a0