[INFO] fetching crate hibit_tree 0.1.0-beta.1...
[INFO] testing hibit_tree-0.1.0-beta.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate hibit_tree 0.1.0-beta.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate hibit_tree 0.1.0-beta.1
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate hibit_tree 0.1.0-beta.1
[INFO] tweaked toml for crates.io crate hibit_tree 0.1.0-beta.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate hibit_tree 0.1.0-beta.1 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 hibit_tree 0.1.0-beta.1 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]  Downloading crates ...
[INFO] [stderr]   Downloaded bytemuck v1.18.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.93
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.93
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.93
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.93
[INFO] [stderr]   Downloaded js-sys v0.3.70
[INFO] [stderr]   Downloaded plotters-backend v0.3.6
[INFO] [stderr]   Downloaded clap v4.5.17
[INFO] [stderr]   Downloaded plotters-svg v0.3.6
[INFO] [stderr]   Downloaded safe_arch v0.7.1
[INFO] [stderr]   Downloaded wide v0.7.28
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.93
[INFO] [stderr]   Downloaded web-sys v0.3.70
[INFO] [stderr]   Downloaded plotters v0.3.6
[INFO] [stderr]   Downloaded clap_builder v4.5.17
[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] fea8557be86f09e2b85a038512102e7f08de854582b76a71f45ef1105d02f98d
[INFO] running `Command { std: "docker" "start" "-a" "fea8557be86f09e2b85a038512102e7f08de854582b76a71f45ef1105d02f98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fea8557be86f09e2b85a038512102e7f08de854582b76a71f45ef1105d02f98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fea8557be86f09e2b85a038512102e7f08de854582b76a71f45ef1105d02f98d", kill_on_drop: false }`
[INFO] [stdout] fea8557be86f09e2b85a038512102e7f08de854582b76a71f45ef1105d02f98d
[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] d27cd2df4ba8130b3f859a5260c9885fc3c6cb3e35f89039183b2ff81b0aeeaf
[INFO] running `Command { std: "docker" "start" "-a" "d27cd2df4ba8130b3f859a5260c9885fc3c6cb3e35f89039183b2ff81b0aeeaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling bytemuck v1.18.0
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling safe_arch v0.7.1
[INFO] [stderr]    Compiling wide v0.7.28
[INFO] [stderr]    Compiling hibit_tree v0.1.0-beta.1 (/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(maybe_uninit_array_assume_init)]
[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 `hibit_tree` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "d27cd2df4ba8130b3f859a5260c9885fc3c6cb3e35f89039183b2ff81b0aeeaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d27cd2df4ba8130b3f859a5260c9885fc3c6cb3e35f89039183b2ff81b0aeeaf", kill_on_drop: false }`
[INFO] [stdout] d27cd2df4ba8130b3f859a5260c9885fc3c6cb3e35f89039183b2ff81b0aeeaf