[INFO] crate feather_m4 0.3.0 is already in cache
[INFO] testing feather_m4-0.3.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate feather_m4 0.3.0 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate feather_m4 0.3.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate feather_m4 0.3.0
[INFO] finished tweaking crates.io crate feather_m4 0.3.0
[INFO] tweaked toml for crates.io crate feather_m4 0.3.0 written to work/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate feather_m4 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 1c3891e0bb036a84cf1638d47e151f53f8ba8ee7b5694c23864859b8e8eaa56b
[INFO] running `"docker" "start" "-a" "1c3891e0bb036a84cf1638d47e151f53f8ba8ee7b5694c23864859b8e8eaa56b"`
[INFO] [stderr]    Compiling atsamd51j19a v0.6.0
[INFO] [stderr]    Compiling feather_m4 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling atsamd-hal v0.7.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.86s
[INFO] running `"docker" "inspect" "1c3891e0bb036a84cf1638d47e151f53f8ba8ee7b5694c23864859b8e8eaa56b"`
[INFO] running `"docker" "rm" "-f" "1c3891e0bb036a84cf1638d47e151f53f8ba8ee7b5694c23864859b8e8eaa56b"`
[INFO] [stdout] 1c3891e0bb036a84cf1638d47e151f53f8ba8ee7b5694c23864859b8e8eaa56b
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 149c72a56fe277097864b26116bcbb35f8a8c79e7cbc92bf11b880d63e88541d
[INFO] running `"docker" "start" "-a" "149c72a56fe277097864b26116bcbb35f8a8c79e7cbc92bf11b880d63e88541d"`
[INFO] [stderr]    Compiling rgb v0.8.14
[INFO] [stderr]    Compiling smart-leds-trait v0.1.1
[INFO] [stderr]    Compiling ws2812-timer-delay v0.1.0
[INFO] [stderr]    Compiling smart-leds v0.1.0
[INFO] [stderr]    Compiling feather_m4 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: language item required, but not found: `eh_personality`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `feather_m4`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "149c72a56fe277097864b26116bcbb35f8a8c79e7cbc92bf11b880d63e88541d"`
[INFO] running `"docker" "rm" "-f" "149c72a56fe277097864b26116bcbb35f8a8c79e7cbc92bf11b880d63e88541d"`
[INFO] [stdout] 149c72a56fe277097864b26116bcbb35f8a8c79e7cbc92bf11b880d63e88541d