[INFO] cloning repository https://github.com/tweedegolf/embedded-workshop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tweedegolf/embedded-workshop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftweedegolf%2Fembedded-workshop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftweedegolf%2Fembedded-workshop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8839ecc6655863350a49c203a8eaa0ac71dbb153
[INFO] checking tweedegolf/embedded-workshop against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftweedegolf%2Fembedded-workshop" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tweedegolf/embedded-workshop on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-10/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/tweedegolf/embedded-workshop
[INFO] finished tweaking git repo https://github.com/tweedegolf/embedded-workshop
[INFO] tweaked toml for git repo https://github.com/tweedegolf/embedded-workshop written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/tweedegolf/embedded-workshop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8abf324063d299a85b0b02aaaacb0515baf4793e2f9ad5839227f0f0367d1b3c
[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" "8abf324063d299a85b0b02aaaacb0515baf4793e2f9ad5839227f0f0367d1b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8abf324063d299a85b0b02aaaacb0515baf4793e2f9ad5839227f0f0367d1b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8abf324063d299a85b0b02aaaacb0515baf4793e2f9ad5839227f0f0367d1b3c", kill_on_drop: false }`
[INFO] [stdout] 8abf324063d299a85b0b02aaaacb0515baf4793e2f9ad5839227f0f0367d1b3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--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] d5c3f41f884a7563e6544581c01f39d2f030201800a887a3bb6f16da4cf52dbb
[INFO] running `Command { std: "docker" "start" "-a" "d5c3f41f884a7563e6544581c01f39d2f030201800a887a3bb6f16da4cf52dbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling defmt-parser v0.2.0
[INFO] [stderr]    Compiling nrf52840-pac v0.9.0
[INFO] [stderr]    Compiling fixed v1.7.0
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]    Compiling nrf-hal-common v0.12.1
[INFO] [stderr]     Checking display-interface v0.4.0
[INFO] [stderr]    Compiling nrf52840-hal v0.12.1
[INFO] [stderr]     Checking byte-slice-cast v0.3.5
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling lis3dh v0.3.0
[INFO] [stderr]    Compiling panic-probe v0.2.0
[INFO] [stderr]    Compiling heapless v0.6.1
[INFO] [stderr]     Checking rtic-core v0.3.1
[INFO] [stderr]    Compiling cortex-m-rtic v0.5.6
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-dma v0.1.2
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[INFO] [stderr]     Checking embedded-graphics v0.6.2
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]     Checking embedded-hal v0.2.4
[INFO] [stderr]    Compiling defmt v0.2.1
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[INFO] [stderr]     Checking cast v0.2.3
[INFO] [stderr]     Checking cortex-m v0.7.2
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[INFO] [stderr]     Checking display-interface-spi v0.4.0
[INFO] [stderr]     Checking generic-array v0.14.4
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking micromath v1.1.1
[INFO] [stderr]     Checking ssd1306 v0.5.2
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]     Checking accelerometer v0.12.0
[INFO] [stderr]     Checking aligned v0.3.4
[INFO] [stderr]     Checking cortex-m v0.6.7
[INFO] [stderr]    Compiling rtic-syntax v0.4.0
[INFO] [stderr]    Compiling cortex-m-rt-macros v0.1.8
[INFO] [stderr]    Compiling defmt-macros v0.2.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling cortex-m-rtic-macros v0.5.2
[INFO] [stderr]     Checking cortex-m-rt v0.6.13
[INFO] [stderr]     Checking defmt-rtt v0.2.0
[INFO] [stderr]     Checking num_enum v0.5.1
[INFO] [stderr]     Checking examples v0.1.0 (/opt/rustwide/workdir/lectures)
[INFO] [stderr]     Checking assignments v0.1.0 (/opt/rustwide/workdir/assignments)
[INFO] [stdout] warning: unused import: `nrf52840_hal as hal`
[INFO] [stdout]  --> assignments/src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use nrf52840_hal as hal; // memory layout
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[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] [stdout] warning: unused import: `nrf52840_hal as hal`
[INFO] [stdout]  --> assignments/src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use nrf52840_hal as hal; // memory layout
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[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] [stdout] warning: unused import: `hal::prelude::*`
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use hal::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> lectures/src/bin/driver_example.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |     let status = laser_machine.laser_status().unwrap();
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let mut not_chip_sel = port0.p0_28.into_push_pull_output(Level::High).degrade();
[INFO] [stdout]    |         ----^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> lectures/src/bin/driver_example.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let mut spi = hal::Spim::new(
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hal::prelude::*`
[INFO] [stdout]   --> lectures/src/bin/hal_pac_structure.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use hal::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `examples` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             self.spi.write(b"LASER ON!");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |             self.spi.write(b"LASER OFF!");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hal::prelude::*`
[INFO] [stdout]   --> lectures/src/bin/uart_config.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use hal::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::panic::PanicInfo`
[INFO] [stdout]   --> lectures/src/bin/timer_config.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use core::panic::PanicInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hal::gpio::Level`
[INFO] [stdout]   --> lectures/src/bin/i2c_config.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     use hal::gpio::Level;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hal::prelude`
[INFO] [stdout]   --> lectures/src/bin/i2c_config.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use hal::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/timer_config.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         led_1_pin.set_low();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/timer_config.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         led_1_pin.set_high();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hal::gpio::Level`
[INFO] [stdout]   --> lectures/src/bin/i2c_config.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     use hal::gpio::Level;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::panic::PanicInfo`
[INFO] [stdout]   --> lectures/src/bin/gpio_config.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use core::panic::PanicInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hal::prelude`
[INFO] [stdout]   --> lectures/src/bin/i2c_config.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use hal::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::panic::PanicInfo`
[INFO] [stdout]   --> lectures/src/bin/timer_config.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use core::panic::PanicInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hal::prelude::*`
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use hal::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0152]: found duplicate lang item `panic_impl`
[INFO] [stdout]   --> lectures/src/bin/pac_init_example.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn panic(_ef: &PanicInfo) -> ! {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the lang item is first defined in crate `std` (which `test` depends on)
[INFO] [stdout]    = note: first definition in `std` loaded from /opt/rustwide/rustup-home/toolchains/1.55.0-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-008055cc7d873802.rlib
[INFO] [stdout]    = note: second definition in the local crate (`pac_init_example`)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/gpio_config.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |             led_1_pin.set_low();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/gpio_config.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             led_1_pin.set_high();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status`
[INFO] [stdout]    --> lectures/src/bin/driver_example.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |     let status = laser_machine.laser_status().unwrap();
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_status`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let mut not_chip_sel = port0.p0_28.into_push_pull_output(Level::High).degrade();
[INFO] [stdout]    |         ----^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/timer_config.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         led_1_pin.set_low();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/timer_config.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         led_1_pin.set_high();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> lectures/src/bin/driver_example.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let mut spi = hal::Spim::new(
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0152`.
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |             self.spi.write(b"LASER ON!");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/driver_example.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |             self.spi.write(b"LASER OFF!");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::panic::PanicInfo`
[INFO] [stdout]   --> lectures/src/bin/test.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use core::panic::PanicInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `exit`
[INFO] [stdout]   --> lectures/src/bin/test.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 | use examples::{self as _, exit};
[INFO] [stdout]    |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::panic::PanicInfo`
[INFO] [stdout]   --> lectures/src/bin/test.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use core::panic::PanicInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `exit`
[INFO] [stdout]   --> lectures/src/bin/test.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 | use examples::{self as _, exit};
[INFO] [stdout]    |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::panic::PanicInfo`
[INFO] [stdout]   --> lectures/src/bin/gpio_config.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use core::panic::PanicInfo;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/gpio_config.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |             led_1_pin.set_low();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> lectures/src/bin/gpio_config.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             led_1_pin.set_high();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d5c3f41f884a7563e6544581c01f39d2f030201800a887a3bb6f16da4cf52dbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5c3f41f884a7563e6544581c01f39d2f030201800a887a3bb6f16da4cf52dbb", kill_on_drop: false }`
[INFO] [stdout] d5c3f41f884a7563e6544581c01f39d2f030201800a887a3bb6f16da4cf52dbb
