[INFO] fetching crate uartcat 0.1.2...
[INFO] testing uartcat-0.1.2 against master#0d162b25edd5bf0dba9a22e83b614f1113e90474 for pr-150681
[INFO] extracting crate uartcat 0.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate uartcat 0.1.2
[INFO] finished tweaking crates.io crate uartcat 0.1.2
[INFO] tweaked toml for crates.io crate uartcat 0.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate uartcat 0.1.2 on toolchain 0d162b25edd5bf0dba9a22e83b614f1113e90474
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate uartcat 0.1.2 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" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded packbytes v0.2.0
[INFO] [stderr]   Downloaded serial2-tokio v0.1.19
[INFO] [stderr]   Downloaded bilge-impl v0.3.0
[INFO] [stderr]   Downloaded embedded-io-async v0.7.0
[INFO] [stderr]   Downloaded bilge v0.3.0
[INFO] [stderr]   Downloaded packbytes-derive v0.1.0
[INFO] [stderr]   Downloaded serial2 v0.2.33
[INFO] [stderr]   Downloaded embedded-io v0.7.1
[INFO] [stderr]   Downloaded arbitrary-int v2.0.0
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c06092228cfe17ce33cf049a8ea46979e75c2dd9b4b8187b404cdac8063ca532
[INFO] running `Command { std: "docker" "start" "-a" "c06092228cfe17ce33cf049a8ea46979e75c2dd9b4b8187b404cdac8063ca532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c06092228cfe17ce33cf049a8ea46979e75c2dd9b4b8187b404cdac8063ca532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c06092228cfe17ce33cf049a8ea46979e75c2dd9b4b8187b404cdac8063ca532", kill_on_drop: false }`
[INFO] [stdout] c06092228cfe17ce33cf049a8ea46979e75c2dd9b4b8187b404cdac8063ca532
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08052ba06fba21c531bfbc548d3ef4ecbc012eae198fdbbe62459750228ad9b9
[INFO] running `Command { std: "docker" "start" "-a" "08052ba06fba21c531bfbc548d3ef4ecbc012eae198fdbbe62459750228ad9b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling arbitrary-int v2.0.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling heapless v0.9.1
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling proc-macro-error-attr2 v2.0.0
[INFO] [stderr]    Compiling proc-macro-error2 v2.0.1
[INFO] [stderr]    Compiling packbytes-derive v0.1.0
[INFO] [stderr]    Compiling bilge-impl v0.3.0
[INFO] [stderr]    Compiling packbytes v0.2.0
[INFO] [stderr]    Compiling bilge v0.3.0
[INFO] [stderr]    Compiling uartcat v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `MAX_COMMAND` is never used
[INFO] [stdout]  --> src/command.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const MAX_COMMAND: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Command` is never constructed
[INFO] [stdout]   --> src/command.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Command {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `checksum` is never used
[INFO] [stdout]   --> src/command.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn checksum(slice: &[u8]) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BusyMutex` is never constructed
[INFO] [stdout]   --> src/mutex.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct BusyMutex<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `try_lock` and `lock` are never used
[INFO] [stdout]   --> src/mutex.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl<T> BusyMutex<T> {
[INFO] [stdout]    | -------------------- methods in this implementation
[INFO] [stdout] 23 |     /// acquire lock if free, otherwise return None
[INFO] [stdout] 24 |     pub fn try_lock(&self) -> Option<BusyMutexGuard<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub async fn lock(&self) -> BusyMutexGuard<'_, T> {
[INFO] [stdout]    |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BusyMutexGuard` is never constructed
[INFO] [stdout]   --> src/mutex.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct BusyMutexGuard<'m, T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `try_new` is never used
[INFO] [stdout]   --> src/mutex.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl<'m, T> BusyMutexGuard<'m, T> {
[INFO] [stdout]    | --------------------------------- associated function in this implementation
[INFO] [stdout] 50 |     fn try_new(mutex: &'m BusyMutex<T>) -> Option<Self> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.26s
[INFO] running `Command { std: "docker" "inspect" "08052ba06fba21c531bfbc548d3ef4ecbc012eae198fdbbe62459750228ad9b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08052ba06fba21c531bfbc548d3ef4ecbc012eae198fdbbe62459750228ad9b9", kill_on_drop: false }`
[INFO] [stdout] 08052ba06fba21c531bfbc548d3ef4ecbc012eae198fdbbe62459750228ad9b9
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ba88ff4c6b266dcbabce507f086256c7387f96ad95b1ff76180d9564f35d036
[INFO] running `Command { std: "docker" "start" "-a" "0ba88ff4c6b266dcbabce507f086256c7387f96ad95b1ff76180d9564f35d036", kill_on_drop: false }`
[INFO] [stderr]    Compiling uartcat v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `MAX_COMMAND` is never used
[INFO] [stdout]  --> src/command.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const MAX_COMMAND: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Command` is never constructed
[INFO] [stdout]   --> src/command.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Command {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `checksum` is never used
[INFO] [stdout]   --> src/command.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn checksum(slice: &[u8]) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BusyMutex` is never constructed
[INFO] [stdout]   --> src/mutex.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct BusyMutex<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `try_lock` and `lock` are never used
[INFO] [stdout]   --> src/mutex.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl<T> BusyMutex<T> {
[INFO] [stdout]    | -------------------- methods in this implementation
[INFO] [stdout] 23 |     /// acquire lock if free, otherwise return None
[INFO] [stdout] 24 |     pub fn try_lock(&self) -> Option<BusyMutexGuard<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub async fn lock(&self) -> BusyMutexGuard<'_, T> {
[INFO] [stdout]    |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BusyMutexGuard` is never constructed
[INFO] [stdout]   --> src/mutex.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct BusyMutexGuard<'m, T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `try_new` is never used
[INFO] [stdout]   --> src/mutex.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl<'m, T> BusyMutexGuard<'m, T> {
[INFO] [stdout]    | --------------------------------- associated function in this implementation
[INFO] [stdout] 50 |     fn try_new(mutex: &'m BusyMutex<T>) -> Option<Self> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_COMMAND` is never used
[INFO] [stdout]  --> src/command.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const MAX_COMMAND: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Command` is never constructed
[INFO] [stdout]   --> src/command.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Command {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `checksum` is never used
[INFO] [stdout]   --> src/command.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn checksum(slice: &[u8]) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BusyMutex` is never constructed
[INFO] [stdout]   --> src/mutex.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct BusyMutex<T> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `try_lock` and `lock` are never used
[INFO] [stdout]   --> src/mutex.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl<T> BusyMutex<T> {
[INFO] [stdout]    | -------------------- methods in this implementation
[INFO] [stdout] 23 |     /// acquire lock if free, otherwise return None
[INFO] [stdout] 24 |     pub fn try_lock(&self) -> Option<BusyMutexGuard<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub async fn lock(&self) -> BusyMutexGuard<'_, T> {
[INFO] [stdout]    |                  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BusyMutexGuard` is never constructed
[INFO] [stdout]   --> src/mutex.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct BusyMutexGuard<'m, T> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `try_new` is never used
[INFO] [stdout]   --> src/mutex.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl<'m, T> BusyMutexGuard<'m, T> {
[INFO] [stdout]    | --------------------------------- associated function in this implementation
[INFO] [stdout] 50 |     fn try_new(mutex: &'m BusyMutex<T>) -> Option<Self> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "0ba88ff4c6b266dcbabce507f086256c7387f96ad95b1ff76180d9564f35d036", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ba88ff4c6b266dcbabce507f086256c7387f96ad95b1ff76180d9564f35d036", kill_on_drop: false }`
[INFO] [stdout] 0ba88ff4c6b266dcbabce507f086256c7387f96ad95b1ff76180d9564f35d036
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0d162b25edd5bf0dba9a22e83b614f1113e90474" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8d91252c2a9f8d90c0b890135a918c21713bdcbfd1614a1d9975817819feddf3
[INFO] running `Command { std: "docker" "start" "-a" "8d91252c2a9f8d90c0b890135a918c21713bdcbfd1614a1d9975817819feddf3", kill_on_drop: false }`
[INFO] [stderr] warning: constant `MAX_COMMAND` is never used
[INFO] [stderr]  --> src/command.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub const MAX_COMMAND: usize = 4096;
[INFO] [stderr]   |           ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Command` is never constructed
[INFO] [stderr]   --> src/command.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Command {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `checksum` is never used
[INFO] [stderr]   --> src/command.rs:58:8
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn checksum(slice: &[u8]) -> u8 {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BusyMutex` is never constructed
[INFO] [stderr]   --> src/mutex.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub struct BusyMutex<T> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `try_lock` and `lock` are never used
[INFO] [stderr]   --> src/mutex.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 22 | impl<T> BusyMutex<T> {
[INFO] [stderr]    | -------------------- methods in this implementation
[INFO] [stderr] 23 |     /// acquire lock if free, otherwise return None
[INFO] [stderr] 24 |     pub fn try_lock(&self) -> Option<BusyMutexGuard<'_, T>> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 |     pub async fn lock(&self) -> BusyMutexGuard<'_, T> {
[INFO] [stderr]    |                  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BusyMutexGuard` is never constructed
[INFO] [stderr]   --> src/mutex.rs:46:12
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub struct BusyMutexGuard<'m, T> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `try_new` is never used
[INFO] [stderr]   --> src/mutex.rs:50:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | impl<'m, T> BusyMutexGuard<'m, T> {
[INFO] [stderr]    | --------------------------------- associated function in this implementation
[INFO] [stderr] 50 |     fn try_new(mutex: &'m BusyMutex<T>) -> Option<Self> {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `uartcat` (lib) generated 7 warnings
[INFO] [stderr] warning: `uartcat` (lib test) generated 7 warnings (7 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/uartcat-67fc57effb3e56d1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests uartcat
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 28) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 40) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 28) stdout ----
[INFO] [stdout] error[E0425]: cannot find type `SlaveRegister` in this scope
[INFO] [stdout]   --> src/lib.rs:29:24
[INFO] [stdout]    |
[INFO] [stdout] 29 | const CUSTOM_REGISTER: SlaveRegister<u32> = Register::new(0x500);
[INFO] [stdout]    |                        ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this type alias
[INFO] [stdout]    |
[INFO] [stdout] 28 + use uartcat::registers::SlaveRegister;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Register`
[INFO] [stdout]   --> src/lib.rs:29:45
[INFO] [stdout]    |
[INFO] [stdout] 29 | const CUSTOM_REGISTER: SlaveRegister<u32> = Register::new(0x500);
[INFO] [stdout]    |                                             ^^^^^^^^ use of undeclared type `Register`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 28 + use uartcat::registers::Register;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:32:43
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_28_0() {
[INFO] [stdout]    |                                      ---------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 32 | let custom = master.read(CUSTOM_REGISTER).await?.any()?;
[INFO] [stdout]    |                                           ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:33:41
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_28_0() {
[INFO] [stdout]    |                                      ---------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 33 | master.write(CUSTOM_REGISTER, custom+1).await?.any()?;
[INFO] [stdout]    |                                         ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Master`
[INFO] [stdout]   --> src/lib.rs:31:14
[INFO] [stdout]    |
[INFO] [stdout] 31 | let master = Master::new("/dev/ttyUSB1", 1_500_000).unwrap();
[INFO] [stdout]    |              ^^^^^^ use of undeclared type `Master`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 40) stdout ----
[INFO] [stdout] error: expected identifier, found `...`
[INFO] [stdout]   --> src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |     Device {...},
[INFO] [stdout]    |     ------  ^^^ expected identifier
[INFO] [stdout]    |     |
[INFO] [stdout]    |     while parsing this struct
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find type `SlaveRegister` in this scope
[INFO] [stdout]   --> src/lib.rs:41:24
[INFO] [stdout]    |
[INFO] [stdout] 41 | const CUSTOM_REGISTER: SlaveRegister<u32> = Register::new(0x500);
[INFO] [stdout]    |                        ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this type alias
[INFO] [stdout]    |
[INFO] [stdout] 40 + use uartcat::registers::SlaveRegister;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Register`
[INFO] [stdout]   --> src/lib.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 | const CUSTOM_REGISTER: SlaveRegister<u32> = Register::new(0x500);
[INFO] [stdout]    |                                             ^^^^^^^^ use of undeclared type `Register`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 40 + use uartcat::registers::Register;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `UART1` in this scope
[INFO] [stdout]   --> src/lib.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     I2c(UART1, 1_500_000, GPIO1, GPIO2), 
[INFO] [stdout]    |         ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `GPIO1` in this scope
[INFO] [stdout]   --> src/lib.rs:45:27
[INFO] [stdout]    |
[INFO] [stdout] 45 |     I2c(UART1, 1_500_000, GPIO1, GPIO2), 
[INFO] [stdout]    |                           ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `GPIO2` in this scope
[INFO] [stdout]   --> src/lib.rs:45:34
[INFO] [stdout]    |
[INFO] [stdout] 45 |     I2c(UART1, 1_500_000, GPIO1, GPIO2), 
[INFO] [stdout]    |                                  ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Device` in this scope
[INFO] [stdout]   --> src/lib.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     Device {...},
[INFO] [stdout]    |     ^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 40 + use uartcat::registers::Device;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:48:14
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_40_0() {
[INFO] [stdout]    |                                      ---------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 48 | slave.lock().await.set(CUSTOM_REGISTER, 42);
[INFO] [stdout]    |              ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_40_0() {
[INFO] [stdout]    |                                      ---------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 49 | slave.run().await;
[INFO] [stdout]    |             ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Slave`
[INFO] [stdout]   --> src/lib.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 | let slave = Slave::<_, BUFFER>::new(
[INFO] [stdout]    |             ^^^^^ use of undeclared type `Slave`
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `I2c` in this scope
[INFO] [stdout]   --> src/lib.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     I2c(UART1, 1_500_000, GPIO1, GPIO2), 
[INFO] [stdout]    |     ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 11 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0422, E0425, E0433, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0422`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 28)
[INFO] [stdout]     src/lib.rs - (line 40)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.11s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.36s; merged doctests compilation took 0.24s
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "8d91252c2a9f8d90c0b890135a918c21713bdcbfd1614a1d9975817819feddf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d91252c2a9f8d90c0b890135a918c21713bdcbfd1614a1d9975817819feddf3", kill_on_drop: false }`
[INFO] [stdout] 8d91252c2a9f8d90c0b890135a918c21713bdcbfd1614a1d9975817819feddf3
