[INFO] fetching crate mks979b 0.1.0...
[INFO] checking mks979b-0.1.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate mks979b 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate mks979b 0.1.0 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate mks979b 0.1.0
[INFO] finished tweaking crates.io crate mks979b 0.1.0
[INFO] tweaked toml for crates.io crate mks979b 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate mks979b 0.1.0 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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded panic-halt v0.2.0
[INFO] [stderr]   Downloaded smart-leds-trait v0.2.1
[INFO] [stderr]   Downloaded bitbang-hal v0.3.2
[INFO] [stderr]   Downloaded itsybitsy_m4 v0.7.0
[INFO] [stderr]   Downloaded usb-device v0.2.8
[INFO] [stderr]   Downloaded smart-leds v0.3.0
[INFO] [stderr]   Downloaded apa102-spi v0.3.2
[INFO] [stderr]   Downloaded critical-section v0.2.5
[INFO] [stderr]   Downloaded cortex-m-rt v0.7.1
[INFO] [stderr]   Downloaded paste v1.0.6
[INFO] [stderr]   Downloaded atomic-polyfill v0.1.6
[INFO] [stderr]   Downloaded heapless v0.7.10
[INFO] [stderr]   Downloaded cortex-m v0.7.4
[INFO] [stderr]   Downloaded atsamd-hal v0.14.0
[INFO] [stderr]   Downloaded atsamd51g v0.11.0
[INFO] [stderr]   Downloaded seq-macro v0.2.2
[INFO] [stderr]   Downloaded rgb v0.8.32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8b38003d9c7ebf069a84af86af45739460e4bba5c6fef6fd6b1c7781c72e459
[INFO] running `Command { std: "docker" "start" "-a" "b8b38003d9c7ebf069a84af86af45739460e4bba5c6fef6fd6b1c7781c72e459", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8b38003d9c7ebf069a84af86af45739460e4bba5c6fef6fd6b1c7781c72e459", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8b38003d9c7ebf069a84af86af45739460e4bba5c6fef6fd6b1c7781c72e459", kill_on_drop: false }`
[INFO] [stdout] b8b38003d9c7ebf069a84af86af45739460e4bba5c6fef6fd6b1c7781c72e459
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d3bedaea80eed0faaa70ac21c39e0771f785b2273f49b817644c88d953ccbf8
[INFO] running `Command { std: "docker" "start" "-a" "9d3bedaea80eed0faaa70ac21c39e0771f785b2273f49b817644c88d953ccbf8", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling cortex-m-rt v0.7.1
[INFO] [stderr]    Compiling cortex-m v0.7.4
[INFO] [stderr]     Checking bytemuck v1.8.0
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling atsamd51g v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]    Compiling heapless v0.7.10
[INFO] [stderr]     Checking usb-device v0.2.8
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking replace_with v0.1.7
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]    Compiling seq-macro v0.2.2
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]    Compiling itsybitsy_m4 v0.7.0
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]     Checking numtoa v0.2.4
[INFO] [stderr]     Checking rgb v0.8.32
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking bitbang-hal v0.3.2
[INFO] [stderr]     Checking usbd-serial v0.1.1
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]     Checking smart-leds-trait v0.2.1
[INFO] [stderr]     Checking apa102-spi v0.3.2
[INFO] [stderr]     Checking smart-leds v0.3.0
[INFO] [stderr]     Checking mks979b v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serial` is imported redundantly
[INFO] [stdout]  --> src/fsm.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use embedded_hal::serial;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 8 | use crate::*;
[INFO] [stdout]   |     -------- the item `serial` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.7.0
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]     Checking modular-bitfield v0.11.2
[INFO] [stderr]     Checking atsamd-hal v0.14.0
[INFO] [stdout] warning: the item `serial` is imported redundantly
[INFO] [stdout]  --> src/fsm.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use embedded_hal::serial;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 8 | use crate::*;
[INFO] [stdout]   |     -------- the item `serial` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mks979b` (example "itsybitsy_m4") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9d3bedaea80eed0faaa70ac21c39e0771f785b2273f49b817644c88d953ccbf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d3bedaea80eed0faaa70ac21c39e0771f785b2273f49b817644c88d953ccbf8", kill_on_drop: false }`
[INFO] [stdout] 9d3bedaea80eed0faaa70ac21c39e0771f785b2273f49b817644c88d953ccbf8
