[INFO] crate arduino_mkrzero 0.3.0 is already in cache
[INFO] extracting crate arduino_mkrzero 0.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/arduino_mkrzero/0.3.0
[INFO] extracting crate arduino_mkrzero 0.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arduino_mkrzero/0.3.0
[INFO] validating manifest of arduino_mkrzero-0.3.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of arduino_mkrzero-0.3.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing arduino_mkrzero-0.3.0
[INFO] finished frobbing arduino_mkrzero-0.3.0
[INFO] frobbed toml for arduino_mkrzero-0.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/arduino_mkrzero/0.3.0/Cargo.toml
[INFO] started frobbing arduino_mkrzero-0.3.0
[INFO] finished frobbing arduino_mkrzero-0.3.0
[INFO] frobbed toml for arduino_mkrzero-0.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arduino_mkrzero/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing arduino_mkrzero-0.3.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arduino_mkrzero/0.3.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 1582659f984a109579851c450fca6b0d1f6fd0e8e27cf86aa913d0c967822d34
[INFO] running `"docker" "start" "-a" "1582659f984a109579851c450fca6b0d1f6fd0e8e27cf86aa913d0c967822d34"`
[INFO] [stderr]    Compiling cortex-m-rt v0.6.10
[INFO] [stderr]    Compiling r0 v0.2.2
[INFO] [stderr]    Compiling atsamd21g18a v0.4.0
[INFO] [stderr]    Compiling arduino_mkrzero v0.3.0 (/opt/crater/workdir)
[INFO] [stderr]    Compiling panic-halt v0.2.0
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.5
[INFO] [stderr]    Compiling paste-impl v0.1.6
[INFO] [stderr]    Compiling paste v0.1.6
[INFO] [stderr]    Compiling atsamd-hal v0.5.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.56s
[INFO] running `"docker" "inspect" "1582659f984a109579851c450fca6b0d1f6fd0e8e27cf86aa913d0c967822d34"`
[INFO] running `"docker" "rm" "-f" "1582659f984a109579851c450fca6b0d1f6fd0e8e27cf86aa913d0c967822d34"`
[INFO] [stdout] 1582659f984a109579851c450fca6b0d1f6fd0e8e27cf86aa913d0c967822d34
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/arduino_mkrzero/0.3.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 064ead195da8cba5d23fb24255e3c3fb15acc92c8590b9e2fe378f2eb61485f1
[INFO] running `"docker" "start" "-a" "064ead195da8cba5d23fb24255e3c3fb15acc92c8590b9e2fe378f2eb61485f1"`
[INFO] [stderr]    Compiling arduino_mkrzero v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] error: language item required, but not found: `eh_personality`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'hal::prelude::_embedded_hal_digital_OutputPin::set_high': Deprecated because the methods cannot return errors. Users should use the traits in digital::v2.
[INFO] [stderr]   --> examples/blinky_basic.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         led.set_high();
[INFO] [stderr]    |             ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'hal::prelude::_embedded_hal_digital_OutputPin::set_low': Deprecated because the methods cannot return errors. Users should use the traits in digital::v2.
[INFO] [stderr]   --> examples/blinky_basic.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         led.set_low();
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `arduino_mkrzero`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: duplicate lang item in crate `std`: `panic_impl`.
[INFO] [stderr]   |
[INFO] [stderr]   = note: first defined in crate `panic_halt`.
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `arduino_mkrzero`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "064ead195da8cba5d23fb24255e3c3fb15acc92c8590b9e2fe378f2eb61485f1"`
[INFO] running `"docker" "rm" "-f" "064ead195da8cba5d23fb24255e3c3fb15acc92c8590b9e2fe378f2eb61485f1"`
[INFO] [stdout] 064ead195da8cba5d23fb24255e3c3fb15acc92c8590b9e2fe378f2eb61485f1