[INFO] fetching crate ldc1x1x 0.1.2...
[INFO] testing ldc1x1x-0.1.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate ldc1x1x 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate ldc1x1x 0.1.2
[INFO] finished tweaking crates.io crate ldc1x1x 0.1.2
[INFO] tweaked toml for crates.io crate ldc1x1x 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ldc1x1x 0.1.2 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 ldc1x1x 0.1.2 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nb v1.0.0
[INFO] [stderr]   Downloaded embedded-hal v1.0.0-alpha.6
[INFO] [stderr]   Downloaded libc v0.2.134
[INFO] [stderr]   Downloaded freebsd-embedded-hal v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 48a185d5a57a0c2b28e17b6097950fac060943bc92501a91cf3a6de7cd54bad9
[INFO] running `Command { std: "docker" "start" "-a" "48a185d5a57a0c2b28e17b6097950fac060943bc92501a91cf3a6de7cd54bad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48a185d5a57a0c2b28e17b6097950fac060943bc92501a91cf3a6de7cd54bad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48a185d5a57a0c2b28e17b6097950fac060943bc92501a91cf3a6de7cd54bad9", kill_on_drop: false }`
[INFO] [stdout] 48a185d5a57a0c2b28e17b6097950fac060943bc92501a91cf3a6de7cd54bad9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 234fa332abc571b4dd8b1a0a55e1b1a12d176cb10ef8ddd42187bf0b3cb2e670
[INFO] running `Command { std: "docker" "start" "-a" "234fa332abc571b4dd8b1a0a55e1b1a12d176cb10ef8ddd42187bf0b3cb2e670", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling embedded-hal v1.0.0-alpha.6
[INFO] [stderr]    Compiling ldc1x1x v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(const_float_bits_conv, const_fn_floating_point_arithmetic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `const_fn_floating_point_arithmetic` has been stable since `1.82.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_fn_floating_point_arithmetic` has been stable since 1.82.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:7:35
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(const_float_bits_conv, const_fn_floating_point_arithmetic)]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_float_bits_conv` has been stable since 1.83.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(const_float_bits_conv, const_fn_floating_point_arithmetic)]
[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 `ldc1x1x` (lib) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "234fa332abc571b4dd8b1a0a55e1b1a12d176cb10ef8ddd42187bf0b3cb2e670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "234fa332abc571b4dd8b1a0a55e1b1a12d176cb10ef8ddd42187bf0b3cb2e670", kill_on_drop: false }`
[INFO] [stdout] 234fa332abc571b4dd8b1a0a55e1b1a12d176cb10ef8ddd42187bf0b3cb2e670