[INFO] cloning repository https://github.com/boshtannik/embedded-nano-mesh-arduino-nano-io
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/boshtannik/embedded-nano-mesh-arduino-nano-io" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboshtannik%2Fembedded-nano-mesh-arduino-nano-io", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboshtannik%2Fembedded-nano-mesh-arduino-nano-io'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 028d35291d688bb3b8b166a96a71402e2434f6de
[INFO] checking boshtannik/embedded-nano-mesh-arduino-nano-io against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboshtannik%2Fembedded-nano-mesh-arduino-nano-io" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/boshtannik/embedded-nano-mesh-arduino-nano-io
[INFO] finished tweaking git repo https://github.com/boshtannik/embedded-nano-mesh-arduino-nano-io
[INFO] tweaked toml for git repo https://github.com/boshtannik/embedded-nano-mesh-arduino-nano-io written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/boshtannik/embedded-nano-mesh-arduino-nano-io on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/boshtannik/embedded-nano-mesh-arduino-nano-io 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6085b98e02f4d36b55a9824d55f17c5025ce7e65269b7a717bd65165587ddd55
[INFO] running `Command { std: "docker" "start" "-a" "6085b98e02f4d36b55a9824d55f17c5025ce7e65269b7a717bd65165587ddd55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6085b98e02f4d36b55a9824d55f17c5025ce7e65269b7a717bd65165587ddd55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6085b98e02f4d36b55a9824d55f17c5025ce7e65269b7a717bd65165587ddd55", kill_on_drop: false }`
[INFO] [stdout] 6085b98e02f4d36b55a9824d55f17c5025ce7e65269b7a717bd65165587ddd55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b242e7b5ee1bf7dbbe06d8c4a58fd9b04689bb6072ad9a449c7ade8f28b9664a
[INFO] running `Command { std: "docker" "start" "-a" "b242e7b5ee1bf7dbbe06d8c4a58fd9b04689bb6072ad9a449c7ade8f28b9664a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking nb v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]    Compiling avr-hal-generic v0.1.0 (https://github.com/rahix/avr-hal?rev=190f2c3cb8d29e10f71119352b912369dc5a1fb7#190f2c3c)
[INFO] [stderr]     Checking bare-metal v1.0.0
[INFO] [stderr]     Checking embedded-storage v0.2.0
[INFO] [stderr]     Checking embedded-io v0.6.1
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling avr-device-macros v0.5.4
[INFO] [stderr]    Compiling ufmt-macros v0.2.0
[INFO] [stderr]    Compiling ufmt-macros v0.3.0
[INFO] [stderr]     Checking ufmt v0.1.2
[INFO] [stderr]     Checking ufmt v0.2.0
[INFO] [stderr]     Checking avr-device v0.5.4
[INFO] [stderr]     Checking atmega-hal v0.1.0 (https://github.com/rahix/avr-hal?rev=190f2c3cb8d29e10f71119352b912369dc5a1fb7#190f2c3c)
[INFO] [stderr]     Checking arduino-hal v0.1.0 (https://github.com/rahix/avr-hal?rev=190f2c3cb8d29e10f71119352b912369dc5a1fb7#190f2c3c)
[INFO] [stderr]     Checking embedded-nano-mesh-arduino-nano-io v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:32:59
[INFO] [stdout]    |
[INFO] [stdout] 32 |       fn read_ready(&mut self) -> Result<bool, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________^
[INFO] [stdout] 33 | |         if self.inner_byte_cache.is_some() {
[INFO] [stdout] 34 | |             return Ok(true);
[INFO] [stdout] ...  |
[INFO] [stdout] 44 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:34:20
[INFO] [stdout]    |
[INFO] [stdout] 34 |             return Ok(true);
[INFO] [stdout]    |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | /         match embedded_hal::serial::Read::read(&mut self.usart) {
[INFO] [stdout] 38 | |             Ok(byte) => {
[INFO] [stdout] 39 | |                 self.inner_byte_cache.replace(byte);
[INFO] [stdout] 40 | |                 Ok(true)
[INFO] [stdout] 41 | |             }
[INFO] [stdout] 42 | |             Err(_) => Ok(false),
[INFO] [stdout] 43 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |               Ok(byte) => {
[INFO] [stdout]    |  _________________________^
[INFO] [stdout] 39 | |                 self.inner_byte_cache.replace(byte);
[INFO] [stdout] 40 | |                 Ok(true)
[INFO] [stdout] 41 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |                 Ok(true)
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:42:23
[INFO] [stdout]    |
[INFO] [stdout] 42 |             Err(_) => Ok(false),
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:48:70
[INFO] [stdout]    |
[INFO] [stdout] 48 |       fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________________^
[INFO] [stdout] 49 | |         let mut red_count = usize::default();
[INFO] [stdout] 50 | |
[INFO] [stdout] 51 | |         for read_buf_byte in buf.iter_mut() {
[INFO] [stdout] ...  |
[INFO] [stdout] 63 | |         Ok(red_count)
[INFO] [stdout] 64 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:56:23
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 match self.read_ready() {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         Ok(red_count)
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:68:67
[INFO] [stdout]    |
[INFO] [stdout] 68 |       fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________________^
[INFO] [stdout] 69 | |         let mut written_count = usize::default();
[INFO] [stdout] 70 | |         for write_buf_byte in buf.iter() {
[INFO] [stdout] 71 | |             self.usart.write_byte(*write_buf_byte);
[INFO] [stdout] ...  |
[INFO] [stdout] 74 | |         Ok(written_count)
[INFO] [stdout] 75 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         Ok(written_count)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `embedded-nano-mesh-arduino-nano-io` (lib) due to 11 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:32:59
[INFO] [stdout]    |
[INFO] [stdout] 32 |       fn read_ready(&mut self) -> Result<bool, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________^
[INFO] [stdout] 33 | |         if self.inner_byte_cache.is_some() {
[INFO] [stdout] 34 | |             return Ok(true);
[INFO] [stdout] ...  |
[INFO] [stdout] 44 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:34:20
[INFO] [stdout]    |
[INFO] [stdout] 34 |             return Ok(true);
[INFO] [stdout]    |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 | /         match embedded_hal::serial::Read::read(&mut self.usart) {
[INFO] [stdout] 38 | |             Ok(byte) => {
[INFO] [stdout] 39 | |                 self.inner_byte_cache.replace(byte);
[INFO] [stdout] 40 | |                 Ok(true)
[INFO] [stdout] 41 | |             }
[INFO] [stdout] 42 | |             Err(_) => Ok(false),
[INFO] [stdout] 43 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:38:25
[INFO] [stdout]    |
[INFO] [stdout] 38 |               Ok(byte) => {
[INFO] [stdout]    |  _________________________^
[INFO] [stdout] 39 | |                 self.inner_byte_cache.replace(byte);
[INFO] [stdout] 40 | |                 Ok(true)
[INFO] [stdout] 41 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |                 Ok(true)
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:42:23
[INFO] [stdout]    |
[INFO] [stdout] 42 |             Err(_) => Ok(false),
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:48:70
[INFO] [stdout]    |
[INFO] [stdout] 48 |       fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________________^
[INFO] [stdout] 49 | |         let mut red_count = usize::default();
[INFO] [stdout] 50 | |
[INFO] [stdout] 51 | |         for read_buf_byte in buf.iter_mut() {
[INFO] [stdout] ...  |
[INFO] [stdout] 63 | |         Ok(red_count)
[INFO] [stdout] 64 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]   --> src/lib.rs:56:23
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 match self.read_ready() {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |         Ok(red_count)
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:68:67
[INFO] [stdout]    |
[INFO] [stdout] 68 |       fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________________^
[INFO] [stdout] 69 | |         let mut written_count = usize::default();
[INFO] [stdout] 70 | |         for write_buf_byte in buf.iter() {
[INFO] [stdout] 71 | |             self.usart.write_byte(*write_buf_byte);
[INFO] [stdout] ...  |
[INFO] [stdout] 74 | |         Ok(written_count)
[INFO] [stdout] 75 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/lib.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         Ok(written_count)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `embedded-nano-mesh-arduino-nano-io` (lib test) due to 11 previous errors
[INFO] running `Command { std: "docker" "inspect" "b242e7b5ee1bf7dbbe06d8c4a58fd9b04689bb6072ad9a449c7ade8f28b9664a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b242e7b5ee1bf7dbbe06d8c4a58fd9b04689bb6072ad9a449c7ade8f28b9664a", kill_on_drop: false }`
[INFO] [stdout] b242e7b5ee1bf7dbbe06d8c4a58fd9b04689bb6072ad9a449c7ade8f28b9664a
