[INFO] fetching crate samd21_mini 0.6.0...
[INFO] testing samd21_mini-0.6.0 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate samd21_mini 0.6.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate samd21_mini 0.6.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/.cargo/config
[INFO] started tweaking crates.io crate samd21_mini 0.6.0
[INFO] finished tweaking crates.io crate samd21_mini 0.6.0
[INFO] tweaked toml for crates.io crate samd21_mini 0.6.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate samd21_mini 0.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 473b456e31fc79f330ff2ce88a8c1e75cf601cc091814de727d2ee07c68c75be
[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" "473b456e31fc79f330ff2ce88a8c1e75cf601cc091814de727d2ee07c68c75be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "473b456e31fc79f330ff2ce88a8c1e75cf601cc091814de727d2ee07c68c75be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "473b456e31fc79f330ff2ce88a8c1e75cf601cc091814de727d2ee07c68c75be", kill_on_drop: false }`
[INFO] [stdout] 473b456e31fc79f330ff2ce88a8c1e75cf601cc091814de727d2ee07c68c75be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a41903c28c103171db7628a8b88f08536ac8cf7137f87bc2e26bb40b60f3ebbb
[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" "a41903c28c103171db7628a8b88f08536ac8cf7137f87bc2e26bb40b60f3ebbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling cortex-m v0.6.2
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling cortex-m-rt v0.6.12
[INFO] [stderr]    Compiling r0 v0.2.2
[INFO] [stderr]    Compiling atsamd21g18a v0.7.0
[INFO] [stderr]    Compiling nb v0.1.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling generic-array v0.13.2
[INFO] [stderr]    Compiling embedded-hal v0.2.3
[INFO] [stderr]    Compiling as-slice v0.1.3
[INFO] [stderr]    Compiling aligned v0.3.2
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling paste-impl v0.1.6
[INFO] [stderr]    Compiling paste v0.1.6
[INFO] [stderr]    Compiling atsamd-hal v0.9.0
[INFO] [stderr]    Compiling samd21_mini v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.48s
[INFO] running `Command { std: "docker" "inspect" "a41903c28c103171db7628a8b88f08536ac8cf7137f87bc2e26bb40b60f3ebbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a41903c28c103171db7628a8b88f08536ac8cf7137f87bc2e26bb40b60f3ebbb", kill_on_drop: false }`
[INFO] [stdout] a41903c28c103171db7628a8b88f08536ac8cf7137f87bc2e26bb40b60f3ebbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 221e345972a26a86b14222d0db3814540c63648d8ebc99bc3f3f0cb2b61fbf06
[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" "221e345972a26a86b14222d0db3814540c63648d8ebc99bc3f3f0cb2b61fbf06", kill_on_drop: false }`
[INFO] [stderr]    Compiling heapless v0.5.5
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.5
[INFO] [stderr]    Compiling rtic-core v0.3.0
[INFO] [stderr]    Compiling panic-halt v0.2.0
[INFO] [stderr]    Compiling cortex-m-rtic v0.5.3
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling rtic-syntax v0.4.0
[INFO] [stderr]    Compiling panic-semihosting v0.5.3
[INFO] [stderr]    Compiling cortex-m-rtic-macros v0.5.0
[INFO] [stderr]    Compiling samd21_mini v0.6.0 (/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 `samd21_mini`.
[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" "221e345972a26a86b14222d0db3814540c63648d8ebc99bc3f3f0cb2b61fbf06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "221e345972a26a86b14222d0db3814540c63648d8ebc99bc3f3f0cb2b61fbf06", kill_on_drop: false }`
[INFO] [stdout] 221e345972a26a86b14222d0db3814540c63648d8ebc99bc3f3f0cb2b61fbf06