[INFO] fetching crate arduino_mkr1000 0.3.0...
[INFO] testing arduino_mkr1000-0.3.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate arduino_mkr1000 0.3.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate arduino_mkr1000 0.3.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-8/source/.cargo/config
[INFO] started tweaking crates.io crate arduino_mkr1000 0.3.0
[INFO] finished tweaking crates.io crate arduino_mkr1000 0.3.0
[INFO] tweaked toml for crates.io crate arduino_mkr1000 0.3.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate arduino_mkr1000 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 035b06113e269d4cfb593300fd279f045c2f8cc57ef6e2aed5f82163559e4db8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "035b06113e269d4cfb593300fd279f045c2f8cc57ef6e2aed5f82163559e4db8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "035b06113e269d4cfb593300fd279f045c2f8cc57ef6e2aed5f82163559e4db8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "035b06113e269d4cfb593300fd279f045c2f8cc57ef6e2aed5f82163559e4db8", kill_on_drop: false }`
[INFO] [stdout] 035b06113e269d4cfb593300fd279f045c2f8cc57ef6e2aed5f82163559e4db8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 896ee5f6386aa11cfb5b1f9a079a9caeae6e65f53d8b8c74a6ea2c9ad3e0ecc6
[INFO] running `Command { std: "docker" "start" "-a" "896ee5f6386aa11cfb5b1f9a079a9caeae6e65f53d8b8c74a6ea2c9ad3e0ecc6", kill_on_drop: false }`
[INFO] [stderr]    Compiling arduino_mkr1000 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling atsamd-hal v0.12.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.90s
[INFO] running `Command { std: "docker" "inspect" "896ee5f6386aa11cfb5b1f9a079a9caeae6e65f53d8b8c74a6ea2c9ad3e0ecc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "896ee5f6386aa11cfb5b1f9a079a9caeae6e65f53d8b8c74a6ea2c9ad3e0ecc6", kill_on_drop: false }`
[INFO] [stdout] 896ee5f6386aa11cfb5b1f9a079a9caeae6e65f53d8b8c74a6ea2c9ad3e0ecc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2dcf352c2cdf52f4cc27bede3568d14a7267d346ef3568986a74531b208f23dc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2dcf352c2cdf52f4cc27bede3568d14a7267d346ef3568986a74531b208f23dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling arduino_mkr1000 v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arduino_mkr1000`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2dcf352c2cdf52f4cc27bede3568d14a7267d346ef3568986a74531b208f23dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dcf352c2cdf52f4cc27bede3568d14a7267d346ef3568986a74531b208f23dc", kill_on_drop: false }`
[INFO] [stdout] 2dcf352c2cdf52f4cc27bede3568d14a7267d346ef3568986a74531b208f23dc