[INFO] fetching crate scd30 0.3.0...
[INFO] testing scd30-0.3.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate scd30 0.3.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate scd30 0.3.0
[INFO] finished tweaking crates.io crate scd30 0.3.0
[INFO] tweaked toml for crates.io crate scd30 0.3.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate scd30 0.3.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] [stderr]       Adding crc_all v0.1.0 (available: v0.2.2)
[INFO] [stderr]       Adding embedded-hal v0.2.7 (available: v1.0.0)
[INFO] [stderr]       Adding heapless v0.4.4 (available: v0.9.1)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded as-slice v0.1.5
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded nb v1.1.0
[INFO] [stderr]   Downloaded generic-array v0.13.3
[INFO] [stderr]   Downloaded nb v0.1.3
[INFO] [stderr]   Downloaded heapless v0.4.4
[INFO] [stderr]   Downloaded embedded-hal v0.2.7
[INFO] [stderr]   Downloaded generic-array v0.12.4
[INFO] [stderr]   Downloaded crc_all v0.1.0
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea7d35243a291a367450ea9c9a74715de7e9c73689e43a160769123977b0e617
[INFO] running `Command { std: "docker" "start" "-a" "ea7d35243a291a367450ea9c9a74715de7e9c73689e43a160769123977b0e617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea7d35243a291a367450ea9c9a74715de7e9c73689e43a160769123977b0e617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea7d35243a291a367450ea9c9a74715de7e9c73689e43a160769123977b0e617", kill_on_drop: false }`
[INFO] [stdout] ea7d35243a291a367450ea9c9a74715de7e9c73689e43a160769123977b0e617
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 389e7672d5f47c013b6f8c0be57b8044253d5fe73b4b4048ea5f64dfa6980400
[INFO] running `Command { std: "docker" "start" "-a" "389e7672d5f47c013b6f8c0be57b8044253d5fe73b4b4048ea5f64dfa6980400", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]    Compiling generic-array v0.14.9
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling heapless v0.4.4
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling crc_all v0.1.0
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling nb v0.1.3
[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/crc_all-0.1.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(reverse_bits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `crc_all` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "389e7672d5f47c013b6f8c0be57b8044253d5fe73b4b4048ea5f64dfa6980400", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "389e7672d5f47c013b6f8c0be57b8044253d5fe73b4b4048ea5f64dfa6980400", kill_on_drop: false }`
[INFO] [stdout] 389e7672d5f47c013b6f8c0be57b8044253d5fe73b4b4048ea5f64dfa6980400