[INFO] fetching crate transvec 0.3.7...
[INFO] testing transvec-0.3.7 against 1.90.0 for beta-1.91-3
[INFO] extracting crate transvec 0.3.7 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate transvec 0.3.7
[INFO] finished tweaking crates.io crate transvec 0.3.7
[INFO] tweaked toml for crates.io crate transvec 0.3.7 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate transvec 0.3.7 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 1 package to latest compatible version
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1acb8ee876a841a06ea8e7fb423a577e3f8bc8dca627ce23deaf266a256700c7
[INFO] running `Command { std: "docker" "start" "-a" "1acb8ee876a841a06ea8e7fb423a577e3f8bc8dca627ce23deaf266a256700c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1acb8ee876a841a06ea8e7fb423a577e3f8bc8dca627ce23deaf266a256700c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1acb8ee876a841a06ea8e7fb423a577e3f8bc8dca627ce23deaf266a256700c7", kill_on_drop: false }`
[INFO] [stdout] 1acb8ee876a841a06ea8e7fb423a577e3f8bc8dca627ce23deaf266a256700c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 51fd1a061bbddcdec1ea3c77217f07e7946ead42331114794f84ae771a3a6cfa
[INFO] running `Command { std: "docker" "start" "-a" "51fd1a061bbddcdec1ea3c77217f07e7946ead42331114794f84ae771a3a6cfa", kill_on_drop: false }`
[INFO] [stderr]    Compiling bytemuck v1.23.2
[INFO] [stderr]    Compiling transvec v0.3.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature = "allocator_api", 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 `transvec` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "51fd1a061bbddcdec1ea3c77217f07e7946ead42331114794f84ae771a3a6cfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51fd1a061bbddcdec1ea3c77217f07e7946ead42331114794f84ae771a3a6cfa", kill_on_drop: false }`
[INFO] [stdout] 51fd1a061bbddcdec1ea3c77217f07e7946ead42331114794f84ae771a3a6cfa