[INFO] fetching crate cocoon-tpm-utils-common 0.1.1...
[INFO] checking cocoon-tpm-utils-common-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cocoon-tpm-utils-common 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate cocoon-tpm-utils-common 0.1.1
[INFO] finished tweaking crates.io crate cocoon-tpm-utils-common 0.1.1
[INFO] tweaked toml for crates.io crate cocoon-tpm-utils-common 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cocoon-tpm-utils-common 0.1.1 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 crates.io crate cocoon-tpm-utils-common 0.1.1 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f1625f80612216969f474bf7f89d0dec4734788d02fc3ba5e8e97827107bae4c
[INFO] running `Command { std: "docker" "start" "-a" "f1625f80612216969f474bf7f89d0dec4734788d02fc3ba5e8e97827107bae4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1625f80612216969f474bf7f89d0dec4734788d02fc3ba5e8e97827107bae4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1625f80612216969f474bf7f89d0dec4734788d02fc3ba5e8e97827107bae4c", kill_on_drop: false }`
[INFO] [stdout] f1625f80612216969f474bf7f89d0dec4734788d02fc3ba5e8e97827107bae4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] a90459c1f2a8ed1fac817a77b1b293f323b71c2f32939ea8712993e4c4642b43
[INFO] running `Command { std: "docker" "start" "-a" "a90459c1f2a8ed1fac817a77b1b293f323b71c2f32939ea8712993e4c4642b43", kill_on_drop: false }`
[INFO] [stderr]     Checking cmpa v0.1.0
[INFO] [stderr]     Checking cocoon-tpm-utils-common v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1005:79
[INFO] [stdout]      |
[INFO] [stdout] 1005 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1006 | |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout] 1007 | |     }
[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<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1006:9
[INFO] [stdout]      |
[INFO] [stdout] 1006 |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1011:110
[INFO] [stdout]      |
[INFO] [stdout] 1011 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1012 | |         self.maybe_refill_head();
[INFO] [stdout] 1013 | |
[INFO] [stdout] 1014 | |         let max_len = if let Some(max_len) = max_len {
[INFO] [stdout] ...    |
[INFO] [stdout] 1029 | |         Ok(consumed)
[INFO] [stdout] 1030 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1017:20
[INFO] [stdout]      |
[INFO] [stdout] 1017 |             return Ok(self.head.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1029:9
[INFO] [stdout]      |
[INFO] [stdout] 1029 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1034:115
[INFO] [stdout]      |
[INFO] [stdout] 1034 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1035 | |         if self.tail.is_none() {
[INFO] [stdout] 1036 | |             while !self.buffers_slice.is_empty() {
[INFO] [stdout] 1037 | |                 let tail;
[INFO] [stdout] ...    |
[INFO] [stdout] 1069 | |         Ok(consumed)
[INFO] [stdout] 1070 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1056:20
[INFO] [stdout]      |
[INFO] [stdout] 1056 |             return Ok(self.tail.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1069:9
[INFO] [stdout]      |
[INFO] [stdout] 1069 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1110:15
[INFO] [stdout]      |
[INFO] [stdout] 1110 |         match self.next_slice(None) {
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1286:79
[INFO] [stdout]      |
[INFO] [stdout] 1286 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1287 | |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout] 1288 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1287:9
[INFO] [stdout]      |
[INFO] [stdout] 1287 |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1292:110
[INFO] [stdout]      |
[INFO] [stdout] 1292 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1293 | |         self.maybe_refill_head();
[INFO] [stdout] 1294 | |
[INFO] [stdout] 1295 | |         let max_len = if let Some(max_len) = max_len {
[INFO] [stdout] ...    |
[INFO] [stdout] 1310 | |         Ok(consumed)
[INFO] [stdout] 1311 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1298:20
[INFO] [stdout]      |
[INFO] [stdout] 1298 |             return Ok(self.head.take().map(|s| &*s));
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1310:9
[INFO] [stdout]      |
[INFO] [stdout] 1310 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1315:118
[INFO] [stdout]      |
[INFO] [stdout] 1315 |       fn next_slice_mut(&mut self, max_len: Option<usize>) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________________^
[INFO] [stdout] 1316 | |         self.maybe_refill_head();
[INFO] [stdout] 1317 | |
[INFO] [stdout] 1318 | |         let max_len = if let Some(max_len) = max_len {
[INFO] [stdout] ...    |
[INFO] [stdout] 1333 | |         Ok(consumed)
[INFO] [stdout] 1334 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1321:20
[INFO] [stdout]      |
[INFO] [stdout] 1321 |             return Ok(self.head.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1333:9
[INFO] [stdout]      |
[INFO] [stdout] 1333 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1338:115
[INFO] [stdout]      |
[INFO] [stdout] 1338 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1339 | |         if self.tail.is_none() {
[INFO] [stdout] 1340 | |             if let Some(mut buffers_slice) = self.buffers_slice.take() {
[INFO] [stdout] 1341 | |                 while !buffers_slice.is_empty() {
[INFO] [stdout] ...    |
[INFO] [stdout] 1377 | |         Ok(consumed)
[INFO] [stdout] 1378 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1364:20
[INFO] [stdout]      |
[INFO] [stdout] 1364 |             return Ok(self.tail.take().map(|s| &*s));
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1377:9
[INFO] [stdout]      |
[INFO] [stdout] 1377 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1385:67
[INFO] [stdout]      |
[INFO] [stdout] 1385 |       ) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________^
[INFO] [stdout] 1386 | |         if self.tail.is_none() {
[INFO] [stdout] 1387 | |             if let Some(mut buffers_slice) = self.buffers_slice.take() {
[INFO] [stdout] 1388 | |                 while !buffers_slice.is_empty() {
[INFO] [stdout] ...    |
[INFO] [stdout] 1424 | |         Ok(consumed)
[INFO] [stdout] 1425 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1411:20
[INFO] [stdout]      |
[INFO] [stdout] 1411 |             return Ok(self.tail.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1424:9
[INFO] [stdout]      |
[INFO] [stdout] 1424 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1491:15
[INFO] [stdout]      |
[INFO] [stdout] 1491 |         match self.next_slice_mut(None) {
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1703:79
[INFO] [stdout]      |
[INFO] [stdout] 1703 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1704 | |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout] 1705 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1704:9
[INFO] [stdout]      |
[INFO] [stdout] 1704 |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1709:110
[INFO] [stdout]      |
[INFO] [stdout] 1709 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1710 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1711 | |             Some(slice) => slice,
[INFO] [stdout] 1712 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1720 | |         Ok(Some(head))
[INFO] [stdout] 1721 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1712:28
[INFO] [stdout]      |
[INFO] [stdout] 1712 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1715:20
[INFO] [stdout]      |
[INFO] [stdout] 1715 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1720:9
[INFO] [stdout]      |
[INFO] [stdout] 1720 |         Ok(Some(head))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1725:115
[INFO] [stdout]      |
[INFO] [stdout] 1725 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1726 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1727 | |             Some(slice) => slice,
[INFO] [stdout] 1728 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1736 | |         Ok(Some(tail))
[INFO] [stdout] 1737 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1728:28
[INFO] [stdout]      |
[INFO] [stdout] 1728 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1731:20
[INFO] [stdout]      |
[INFO] [stdout] 1731 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1736:9
[INFO] [stdout]      |
[INFO] [stdout] 1736 |         Ok(Some(tail))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1780:79
[INFO] [stdout]      |
[INFO] [stdout] 1780 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1781 | |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout] 1782 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1781:9
[INFO] [stdout]      |
[INFO] [stdout] 1781 |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1786:110
[INFO] [stdout]      |
[INFO] [stdout] 1786 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1787 | |         self.next_slice_mut(max_len)
[INFO] [stdout] 1788 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1789 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1787:9
[INFO] [stdout]      |
[INFO] [stdout] 1787 | /         self.next_slice_mut(max_len)
[INFO] [stdout] 1788 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1787:9
[INFO] [stdout]      |
[INFO] [stdout] 1787 |         self.next_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1793:118
[INFO] [stdout]      |
[INFO] [stdout] 1793 |       fn next_slice_mut(&mut self, max_len: Option<usize>) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________________^
[INFO] [stdout] 1794 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1795 | |             Some(slice) => slice,
[INFO] [stdout] 1796 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1804 | |         Ok(Some(head))
[INFO] [stdout] 1805 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1796:28
[INFO] [stdout]      |
[INFO] [stdout] 1796 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1799:20
[INFO] [stdout]      |
[INFO] [stdout] 1799 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1804:9
[INFO] [stdout]      |
[INFO] [stdout] 1804 |         Ok(Some(head))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1809:115
[INFO] [stdout]      |
[INFO] [stdout] 1809 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1810 | |         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1811 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1812 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1810:9
[INFO] [stdout]      |
[INFO] [stdout] 1810 | /         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1811 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1810:9
[INFO] [stdout]      |
[INFO] [stdout] 1810 |         self.next_back_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1819:67
[INFO] [stdout]      |
[INFO] [stdout] 1819 |       ) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________^
[INFO] [stdout] 1820 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1821 | |             Some(slice) => slice,
[INFO] [stdout] 1822 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1830 | |         Ok(Some(tail))
[INFO] [stdout] 1831 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1822:28
[INFO] [stdout]      |
[INFO] [stdout] 1822 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1825:20
[INFO] [stdout]      |
[INFO] [stdout] 1825 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1830:9
[INFO] [stdout]      |
[INFO] [stdout] 1830 |         Ok(Some(tail))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1879:79
[INFO] [stdout]      |
[INFO] [stdout] 1879 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1880 | |         Ok(0)
[INFO] [stdout] 1881 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1880:9
[INFO] [stdout]      |
[INFO] [stdout] 1880 |         Ok(0)
[INFO] [stdout]      |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1885:110
[INFO] [stdout]      |
[INFO] [stdout] 1885 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1886 | |         self.next_slice_mut(max_len)
[INFO] [stdout] 1887 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1888 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1886:9
[INFO] [stdout]      |
[INFO] [stdout] 1886 | /         self.next_slice_mut(max_len)
[INFO] [stdout] 1887 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1886:9
[INFO] [stdout]      |
[INFO] [stdout] 1886 |         self.next_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1892:119
[INFO] [stdout]      |
[INFO] [stdout] 1892 |       fn next_slice_mut(&mut self, _max_len: Option<usize>) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________________________________________________^
[INFO] [stdout] 1893 | |         Ok(None)
[INFO] [stdout] 1894 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1893:9
[INFO] [stdout]      |
[INFO] [stdout] 1893 |         Ok(None)
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1898:115
[INFO] [stdout]      |
[INFO] [stdout] 1898 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1899 | |         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1900 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1901 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1899:9
[INFO] [stdout]      |
[INFO] [stdout] 1899 | /         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1900 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1899:9
[INFO] [stdout]      |
[INFO] [stdout] 1899 |         self.next_back_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1908:67
[INFO] [stdout]      |
[INFO] [stdout] 1908 |       ) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________^
[INFO] [stdout] 1909 | |         Ok(None)
[INFO] [stdout] 1910 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1909:9
[INFO] [stdout]      |
[INFO] [stdout] 1909 |         Ok(None)
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1918:70
[INFO] [stdout]      |
[INFO] [stdout] 1918 |       fn total_len(&self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________^
[INFO] [stdout] 1919 | |         Ok(0)
[INFO] [stdout] 1920 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1919:9
[INFO] [stdout]      |
[INFO] [stdout] 1919 |         Ok(0)
[INFO] [stdout]      |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1922:93
[INFO] [stdout]      |
[INFO] [stdout] 1922 |       fn all_aligned_to(&self, _alignment: usize) -> Result<bool, Self::BackendIteratorError> {
[INFO] [stdout]      |  _____________________________________________________________________________________________^
[INFO] [stdout] 1923 | |         Ok(true)
[INFO] [stdout] 1924 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1923:9
[INFO] [stdout]      |
[INFO] [stdout] 1923 |         Ok(true)
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2586:79
[INFO] [stdout]      |
[INFO] [stdout] 2586 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 2587 | |         Ok(self.remaining.min(Self::ZEROES_BUFFER.len()))
[INFO] [stdout] 2588 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2587:9
[INFO] [stdout]      |
[INFO] [stdout] 2587 |         Ok(self.remaining.min(Self::ZEROES_BUFFER.len()))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2590:72
[INFO] [stdout]      |
[INFO] [stdout] 2590 |       fn is_empty(&mut self) -> Result<bool, Self::BackendIteratorError> {
[INFO] [stdout]      |  ________________________________________________________________________^
[INFO] [stdout] 2591 | |         Ok(self.remaining == 0)
[INFO] [stdout] 2592 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2591:9
[INFO] [stdout]      |
[INFO] [stdout] 2591 |         Ok(self.remaining == 0)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2596:110
[INFO] [stdout]      |
[INFO] [stdout] 2596 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 2597 | |         if self.remaining == 0 {
[INFO] [stdout] 2598 | |             return Ok(None);
[INFO] [stdout] ...    |
[INFO] [stdout] 2604 | |         Ok(Some(&Self::ZEROES_BUFFER[..len]))
[INFO] [stdout] 2605 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2598:20
[INFO] [stdout]      |
[INFO] [stdout] 2598 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2604:9
[INFO] [stdout]      |
[INFO] [stdout] 2604 |         Ok(Some(&Self::ZEROES_BUFFER[..len]))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2622:70
[INFO] [stdout]      |
[INFO] [stdout] 2622 |       fn total_len(&self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________^
[INFO] [stdout] 2623 | |         Ok(self.remaining)
[INFO] [stdout] 2624 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2623:9
[INFO] [stdout]      |
[INFO] [stdout] 2623 |         Ok(self.remaining)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2626:92
[INFO] [stdout]      |
[INFO] [stdout] 2626 |       fn all_aligned_to(&self, alignment: usize) -> Result<bool, Self::BackendIteratorError> {
[INFO] [stdout]      |  ____________________________________________________________________________________________^
[INFO] [stdout] 2627 | |         if alignment.is_pow2() {
[INFO] [stdout] 2628 | |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout] 2629 | |         } else {
[INFO] [stdout] ...    |
[INFO] [stdout] 2632 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2627:9
[INFO] [stdout]      |
[INFO] [stdout] 2627 | /         if alignment.is_pow2() {
[INFO] [stdout] 2628 | |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout] 2629 | |         } else {
[INFO] [stdout] 2630 | |             Ok(self.remaining % alignment == 0)
[INFO] [stdout] 2631 | |         }
[INFO] [stdout]      | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2627:32
[INFO] [stdout]      |
[INFO] [stdout] 2627 |           if alignment.is_pow2() {
[INFO] [stdout]      |  ________________________________^
[INFO] [stdout] 2628 | |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout] 2629 | |         } else {
[INFO] [stdout]      | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2628:13
[INFO] [stdout]      |
[INFO] [stdout] 2628 |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2629:16
[INFO] [stdout]      |
[INFO] [stdout] 2629 |           } else {
[INFO] [stdout]      |  ________________^
[INFO] [stdout] 2630 | |             Ok(self.remaining % alignment == 0)
[INFO] [stdout] 2631 | |         }
[INFO] [stdout]      | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2630:13
[INFO] [stdout]      |
[INFO] [stdout] 2630 |             Ok(self.remaining % alignment == 0)
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cocoon-tpm-utils-common` (lib) due to 81 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<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1005:79
[INFO] [stdout]      |
[INFO] [stdout] 1005 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1006 | |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout] 1007 | |     }
[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<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1006:9
[INFO] [stdout]      |
[INFO] [stdout] 1006 |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1011:110
[INFO] [stdout]      |
[INFO] [stdout] 1011 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1012 | |         self.maybe_refill_head();
[INFO] [stdout] 1013 | |
[INFO] [stdout] 1014 | |         let max_len = if let Some(max_len) = max_len {
[INFO] [stdout] ...    |
[INFO] [stdout] 1029 | |         Ok(consumed)
[INFO] [stdout] 1030 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1017:20
[INFO] [stdout]      |
[INFO] [stdout] 1017 |             return Ok(self.head.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1029:9
[INFO] [stdout]      |
[INFO] [stdout] 1029 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1034:115
[INFO] [stdout]      |
[INFO] [stdout] 1034 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1035 | |         if self.tail.is_none() {
[INFO] [stdout] 1036 | |             while !self.buffers_slice.is_empty() {
[INFO] [stdout] 1037 | |                 let tail;
[INFO] [stdout] ...    |
[INFO] [stdout] 1069 | |         Ok(consumed)
[INFO] [stdout] 1070 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1056:20
[INFO] [stdout]      |
[INFO] [stdout] 1056 |             return Ok(self.tail.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1069:9
[INFO] [stdout]      |
[INFO] [stdout] 1069 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1110:15
[INFO] [stdout]      |
[INFO] [stdout] 1110 |         match self.next_slice(None) {
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1126:16
[INFO] [stdout]      |
[INFO] [stdout] 1126 |     assert_eq!(slices.total_len().unwrap(), 4);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1127:16
[INFO] [stdout]      |
[INFO] [stdout] 1127 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 1);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1128:16
[INFO] [stdout]      |
[INFO] [stdout] 1128 |     assert_eq!(slices.next_slice(Some(1)).unwrap().unwrap()[0], 1);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1130:16
[INFO] [stdout]      |
[INFO] [stdout] 1130 |     assert_eq!(slices.total_len().unwrap(), 3);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1131:16
[INFO] [stdout]      |
[INFO] [stdout] 1131 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 2);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1132:16
[INFO] [stdout]      |
[INFO] [stdout] 1132 |     assert_eq!(slices.next_slice(Some(1)).unwrap().unwrap()[0], 2);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1134:16
[INFO] [stdout]      |
[INFO] [stdout] 1134 |     assert_eq!(slices.total_len().unwrap(), 2);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1135:16
[INFO] [stdout]      |
[INFO] [stdout] 1135 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 3);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1136:16
[INFO] [stdout]      |
[INFO] [stdout] 1136 |     assert_eq!(slices.next_slice(Some(1)).unwrap().unwrap()[0], 3);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1138:16
[INFO] [stdout]      |
[INFO] [stdout] 1138 |     assert_eq!(slices.total_len().unwrap(), 1);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1139:16
[INFO] [stdout]      |
[INFO] [stdout] 1139 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 4);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1140:16
[INFO] [stdout]      |
[INFO] [stdout] 1140 |     assert_eq!(slices.next_slice(Some(1)).unwrap().unwrap()[0], 4);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1142:16
[INFO] [stdout]      |
[INFO] [stdout] 1142 |     assert_eq!(slices.total_len().unwrap(), 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1143:13
[INFO] [stdout]      |
[INFO] [stdout] 1143 |     assert!(slices.is_empty().unwrap());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1154:16
[INFO] [stdout]      |
[INFO] [stdout] 1154 |     assert_eq!(slices.total_len().unwrap(), 4);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1156:9
[INFO] [stdout]      |
[INFO] [stdout] 1156 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1159:16
[INFO] [stdout]      |
[INFO] [stdout] 1159 |     assert_eq!(slices.next_back_slice(Some(1)).unwrap().unwrap()[0], 1);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1161:16
[INFO] [stdout]      |
[INFO] [stdout] 1161 |     assert_eq!(slices.total_len().unwrap(), 3);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1163:9
[INFO] [stdout]      |
[INFO] [stdout] 1163 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1166:16
[INFO] [stdout]      |
[INFO] [stdout] 1166 |     assert_eq!(slices.next_back_slice(Some(1)).unwrap().unwrap()[0], 2);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1168:16
[INFO] [stdout]      |
[INFO] [stdout] 1168 |     assert_eq!(slices.total_len().unwrap(), 2);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1170:9
[INFO] [stdout]      |
[INFO] [stdout] 1170 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1173:16
[INFO] [stdout]      |
[INFO] [stdout] 1173 |     assert_eq!(slices.next_back_slice(Some(1)).unwrap().unwrap()[0], 3);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1175:16
[INFO] [stdout]      |
[INFO] [stdout] 1175 |     assert_eq!(slices.total_len().unwrap(), 1);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1177:9
[INFO] [stdout]      |
[INFO] [stdout] 1177 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1180:16
[INFO] [stdout]      |
[INFO] [stdout] 1180 |     assert_eq!(slices.next_back_slice(Some(1)).unwrap().unwrap()[0], 4);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1182:16
[INFO] [stdout]      |
[INFO] [stdout] 1182 |     assert_eq!(slices.total_len().unwrap(), 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1183:13
[INFO] [stdout]      |
[INFO] [stdout] 1183 |     assert!(slices.is_empty().unwrap());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1194:13
[INFO] [stdout]      |
[INFO] [stdout] 1194 |     let s = slices.decoupled_borrow().next_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1197:13
[INFO] [stdout]      |
[INFO] [stdout] 1197 |     let s = slices.next_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1200:13
[INFO] [stdout]      |
[INFO] [stdout] 1200 |     let s = slices.decoupled_borrow().next_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1203:13
[INFO] [stdout]      |
[INFO] [stdout] 1203 |     let s = slices.next_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1206:13
[INFO] [stdout]      |
[INFO] [stdout] 1206 |     assert!(slices.next_slice(None).unwrap().is_none());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1215:13
[INFO] [stdout]      |
[INFO] [stdout] 1215 |     let s = slices.decoupled_borrow().next_back_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1218:13
[INFO] [stdout]      |
[INFO] [stdout] 1218 |     let s = slices.next_back_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1221:13
[INFO] [stdout]      |
[INFO] [stdout] 1221 |     let s = slices.decoupled_borrow().next_back_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1224:13
[INFO] [stdout]      |
[INFO] [stdout] 1224 |     let s = slices.next_back_slice(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1227:13
[INFO] [stdout]      |
[INFO] [stdout] 1227 |     assert!(slices.next_back_slice(None).unwrap().is_none());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1286:79
[INFO] [stdout]      |
[INFO] [stdout] 1286 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1287 | |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout] 1288 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1287:9
[INFO] [stdout]      |
[INFO] [stdout] 1287 |         Ok(self.maybe_refill_head().map(|head| head.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1292:110
[INFO] [stdout]      |
[INFO] [stdout] 1292 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1293 | |         self.maybe_refill_head();
[INFO] [stdout] 1294 | |
[INFO] [stdout] 1295 | |         let max_len = if let Some(max_len) = max_len {
[INFO] [stdout] ...    |
[INFO] [stdout] 1310 | |         Ok(consumed)
[INFO] [stdout] 1311 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1298:20
[INFO] [stdout]      |
[INFO] [stdout] 1298 |             return Ok(self.head.take().map(|s| &*s));
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1310:9
[INFO] [stdout]      |
[INFO] [stdout] 1310 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1315:118
[INFO] [stdout]      |
[INFO] [stdout] 1315 |       fn next_slice_mut(&mut self, max_len: Option<usize>) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________________^
[INFO] [stdout] 1316 | |         self.maybe_refill_head();
[INFO] [stdout] 1317 | |
[INFO] [stdout] 1318 | |         let max_len = if let Some(max_len) = max_len {
[INFO] [stdout] ...    |
[INFO] [stdout] 1333 | |         Ok(consumed)
[INFO] [stdout] 1334 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1321:20
[INFO] [stdout]      |
[INFO] [stdout] 1321 |             return Ok(self.head.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1333:9
[INFO] [stdout]      |
[INFO] [stdout] 1333 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1338:115
[INFO] [stdout]      |
[INFO] [stdout] 1338 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1339 | |         if self.tail.is_none() {
[INFO] [stdout] 1340 | |             if let Some(mut buffers_slice) = self.buffers_slice.take() {
[INFO] [stdout] 1341 | |                 while !buffers_slice.is_empty() {
[INFO] [stdout] ...    |
[INFO] [stdout] 1377 | |         Ok(consumed)
[INFO] [stdout] 1378 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1364:20
[INFO] [stdout]      |
[INFO] [stdout] 1364 |             return Ok(self.tail.take().map(|s| &*s));
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1377:9
[INFO] [stdout]      |
[INFO] [stdout] 1377 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1385:67
[INFO] [stdout]      |
[INFO] [stdout] 1385 |       ) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________^
[INFO] [stdout] 1386 | |         if self.tail.is_none() {
[INFO] [stdout] 1387 | |             if let Some(mut buffers_slice) = self.buffers_slice.take() {
[INFO] [stdout] 1388 | |                 while !buffers_slice.is_empty() {
[INFO] [stdout] ...    |
[INFO] [stdout] 1424 | |         Ok(consumed)
[INFO] [stdout] 1425 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1411:20
[INFO] [stdout]      |
[INFO] [stdout] 1411 |             return Ok(self.tail.take());
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1424:9
[INFO] [stdout]      |
[INFO] [stdout] 1424 |         Ok(consumed)
[INFO] [stdout]      |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1491:15
[INFO] [stdout]      |
[INFO] [stdout] 1491 |         match self.next_slice_mut(None) {
[INFO] [stdout]      |               ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1507:16
[INFO] [stdout]      |
[INFO] [stdout] 1507 |     assert_eq!(slices.total_len().unwrap(), 4);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1508:16
[INFO] [stdout]      |
[INFO] [stdout] 1508 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1509:5
[INFO] [stdout]      |
[INFO] [stdout] 1509 |     slices.decoupled_borrow_mut().next_slice_mut(Some(1)).unwrap().unwrap()[0] = 0xcc;
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1510:13
[INFO] [stdout]      |
[INFO] [stdout] 1510 |     let s = slices.next_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1514:16
[INFO] [stdout]      |
[INFO] [stdout] 1514 |     assert_eq!(slices.total_len().unwrap(), 3);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1515:16
[INFO] [stdout]      |
[INFO] [stdout] 1515 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1516:5
[INFO] [stdout]      |
[INFO] [stdout] 1516 |     slices.decoupled_borrow_mut().next_slice_mut(Some(1)).unwrap().unwrap()[0] = 0xcc;
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1517:13
[INFO] [stdout]      |
[INFO] [stdout] 1517 |     let s = slices.next_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1521:16
[INFO] [stdout]      |
[INFO] [stdout] 1521 |     assert_eq!(slices.total_len().unwrap(), 2);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1522:16
[INFO] [stdout]      |
[INFO] [stdout] 1522 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1523:5
[INFO] [stdout]      |
[INFO] [stdout] 1523 |     slices.decoupled_borrow_mut().next_slice_mut(Some(1)).unwrap().unwrap()[0] = 0xcc;
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1524:13
[INFO] [stdout]      |
[INFO] [stdout] 1524 |     let s = slices.next_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1528:16
[INFO] [stdout]      |
[INFO] [stdout] 1528 |     assert_eq!(slices.total_len().unwrap(), 1);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1529:16
[INFO] [stdout]      |
[INFO] [stdout] 1529 |     assert_eq!(slices.decoupled_borrow().next_slice(Some(1)).unwrap().unwrap()[0], 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1530:5
[INFO] [stdout]      |
[INFO] [stdout] 1530 |     slices.decoupled_borrow_mut().next_slice_mut(Some(1)).unwrap().unwrap()[0] = 0xcc;
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1531:13
[INFO] [stdout]      |
[INFO] [stdout] 1531 |     let s = slices.next_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1535:16
[INFO] [stdout]      |
[INFO] [stdout] 1535 |     assert_eq!(slices.total_len().unwrap(), 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1536:13
[INFO] [stdout]      |
[INFO] [stdout] 1536 |     assert!(slices.is_empty().unwrap());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1547:16
[INFO] [stdout]      |
[INFO] [stdout] 1547 |     assert_eq!(slices.total_len().unwrap(), 4);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1549:9
[INFO] [stdout]      |
[INFO] [stdout] 1549 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1552:5
[INFO] [stdout]      |
[INFO] [stdout] 1552 | /     slices
[INFO] [stdout] 1553 | |         .decoupled_borrow_mut()
[INFO] [stdout] 1554 | |         .next_back_slice_mut(Some(1))
[INFO] [stdout]      | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1557:13
[INFO] [stdout]      |
[INFO] [stdout] 1557 |     let s = slices.next_back_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1561:16
[INFO] [stdout]      |
[INFO] [stdout] 1561 |     assert_eq!(slices.total_len().unwrap(), 3);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1563:9
[INFO] [stdout]      |
[INFO] [stdout] 1563 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1566:5
[INFO] [stdout]      |
[INFO] [stdout] 1566 | /     slices
[INFO] [stdout] 1567 | |         .decoupled_borrow_mut()
[INFO] [stdout] 1568 | |         .next_back_slice_mut(Some(1))
[INFO] [stdout]      | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1571:13
[INFO] [stdout]      |
[INFO] [stdout] 1571 |     let s = slices.next_back_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1575:16
[INFO] [stdout]      |
[INFO] [stdout] 1575 |     assert_eq!(slices.total_len().unwrap(), 2);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1577:9
[INFO] [stdout]      |
[INFO] [stdout] 1577 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1580:5
[INFO] [stdout]      |
[INFO] [stdout] 1580 | /     slices
[INFO] [stdout] 1581 | |         .decoupled_borrow_mut()
[INFO] [stdout] 1582 | |         .next_back_slice_mut(Some(1))
[INFO] [stdout]      | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1585:13
[INFO] [stdout]      |
[INFO] [stdout] 1585 |     let s = slices.next_back_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1589:16
[INFO] [stdout]      |
[INFO] [stdout] 1589 |     assert_eq!(slices.total_len().unwrap(), 1);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1591:9
[INFO] [stdout]      |
[INFO] [stdout] 1591 |         slices.decoupled_borrow().next_back_slice(Some(1)).unwrap().unwrap()[0],
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1594:5
[INFO] [stdout]      |
[INFO] [stdout] 1594 | /     slices
[INFO] [stdout] 1595 | |         .decoupled_borrow_mut()
[INFO] [stdout] 1596 | |         .next_back_slice_mut(Some(1))
[INFO] [stdout]      | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1599:13
[INFO] [stdout]      |
[INFO] [stdout] 1599 |     let s = slices.next_back_slice_mut(Some(1)).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1603:16
[INFO] [stdout]      |
[INFO] [stdout] 1603 |     assert_eq!(slices.total_len().unwrap(), 0);
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1604:13
[INFO] [stdout]      |
[INFO] [stdout] 1604 |     assert!(slices.is_empty().unwrap());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1615:13
[INFO] [stdout]      |
[INFO] [stdout] 1615 |     let s = slices.decoupled_borrow_mut().next_slice_mut(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1619:13
[INFO] [stdout]      |
[INFO] [stdout] 1619 |     let s = slices.next_slice_mut(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1626:13
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     let s = slices.decoupled_borrow_mut().next_slice_mut(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1630:13
[INFO] [stdout]      |
[INFO] [stdout] 1630 |     let s = slices.next_slice_mut(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1637:13
[INFO] [stdout]      |
[INFO] [stdout] 1637 |     assert!(slices.next_slice_mut(None).unwrap().is_none());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1648:13
[INFO] [stdout]      |
[INFO] [stdout] 1648 |       let s = slices
[INFO] [stdout]      |  _____________^
[INFO] [stdout] 1649 | |         .decoupled_borrow_mut()
[INFO] [stdout] 1650 | |         .next_back_slice_mut(None)
[INFO] [stdout]      | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1656:13
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     let s = slices.next_back_slice_mut(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1663:13
[INFO] [stdout]      |
[INFO] [stdout] 1663 |       let s = slices
[INFO] [stdout]      |  _____________^
[INFO] [stdout] 1664 | |         .decoupled_borrow_mut()
[INFO] [stdout] 1665 | |         .next_back_slice_mut(None)
[INFO] [stdout]      | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1671:13
[INFO] [stdout]      |
[INFO] [stdout] 1671 |     let s = slices.next_back_slice_mut(None).unwrap().unwrap();
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1678:13
[INFO] [stdout]      |
[INFO] [stdout] 1678 |     assert!(slices.next_back_slice_mut(None).unwrap().is_none());
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1703:79
[INFO] [stdout]      |
[INFO] [stdout] 1703 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1704 | |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout] 1705 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1704:9
[INFO] [stdout]      |
[INFO] [stdout] 1704 |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1709:110
[INFO] [stdout]      |
[INFO] [stdout] 1709 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1710 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1711 | |             Some(slice) => slice,
[INFO] [stdout] 1712 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1720 | |         Ok(Some(head))
[INFO] [stdout] 1721 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1712:28
[INFO] [stdout]      |
[INFO] [stdout] 1712 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1715:20
[INFO] [stdout]      |
[INFO] [stdout] 1715 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1720:9
[INFO] [stdout]      |
[INFO] [stdout] 1720 |         Ok(Some(head))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1725:115
[INFO] [stdout]      |
[INFO] [stdout] 1725 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1726 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1727 | |             Some(slice) => slice,
[INFO] [stdout] 1728 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1736 | |         Ok(Some(tail))
[INFO] [stdout] 1737 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1728:28
[INFO] [stdout]      |
[INFO] [stdout] 1728 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1731:20
[INFO] [stdout]      |
[INFO] [stdout] 1731 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1736:9
[INFO] [stdout]      |
[INFO] [stdout] 1736 |         Ok(Some(tail))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1780:79
[INFO] [stdout]      |
[INFO] [stdout] 1780 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1781 | |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout] 1782 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1781:9
[INFO] [stdout]      |
[INFO] [stdout] 1781 |         Ok(self.slice.as_ref().map(|slice| slice.len()).unwrap_or(0))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1786:110
[INFO] [stdout]      |
[INFO] [stdout] 1786 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1787 | |         self.next_slice_mut(max_len)
[INFO] [stdout] 1788 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1789 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1787:9
[INFO] [stdout]      |
[INFO] [stdout] 1787 | /         self.next_slice_mut(max_len)
[INFO] [stdout] 1788 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1787:9
[INFO] [stdout]      |
[INFO] [stdout] 1787 |         self.next_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1793:118
[INFO] [stdout]      |
[INFO] [stdout] 1793 |       fn next_slice_mut(&mut self, max_len: Option<usize>) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________________^
[INFO] [stdout] 1794 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1795 | |             Some(slice) => slice,
[INFO] [stdout] 1796 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1804 | |         Ok(Some(head))
[INFO] [stdout] 1805 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1796:28
[INFO] [stdout]      |
[INFO] [stdout] 1796 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1799:20
[INFO] [stdout]      |
[INFO] [stdout] 1799 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1804:9
[INFO] [stdout]      |
[INFO] [stdout] 1804 |         Ok(Some(head))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1809:115
[INFO] [stdout]      |
[INFO] [stdout] 1809 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1810 | |         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1811 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1812 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1810:9
[INFO] [stdout]      |
[INFO] [stdout] 1810 | /         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1811 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1810:9
[INFO] [stdout]      |
[INFO] [stdout] 1810 |         self.next_back_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1819:67
[INFO] [stdout]      |
[INFO] [stdout] 1819 |       ) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________^
[INFO] [stdout] 1820 | |         let slice = match self.slice.take() {
[INFO] [stdout] 1821 | |             Some(slice) => slice,
[INFO] [stdout] 1822 | |             None => return Ok(None),
[INFO] [stdout] ...    |
[INFO] [stdout] 1830 | |         Ok(Some(tail))
[INFO] [stdout] 1831 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1822:28
[INFO] [stdout]      |
[INFO] [stdout] 1822 |             None => return Ok(None),
[INFO] [stdout]      |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1825:20
[INFO] [stdout]      |
[INFO] [stdout] 1825 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1830:9
[INFO] [stdout]      |
[INFO] [stdout] 1830 |         Ok(Some(tail))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1879:79
[INFO] [stdout]      |
[INFO] [stdout] 1879 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 1880 | |         Ok(0)
[INFO] [stdout] 1881 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1880:9
[INFO] [stdout]      |
[INFO] [stdout] 1880 |         Ok(0)
[INFO] [stdout]      |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1885:110
[INFO] [stdout]      |
[INFO] [stdout] 1885 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 1886 | |         self.next_slice_mut(max_len)
[INFO] [stdout] 1887 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1888 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1886:9
[INFO] [stdout]      |
[INFO] [stdout] 1886 | /         self.next_slice_mut(max_len)
[INFO] [stdout] 1887 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1886:9
[INFO] [stdout]      |
[INFO] [stdout] 1886 |         self.next_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1892:119
[INFO] [stdout]      |
[INFO] [stdout] 1892 |       fn next_slice_mut(&mut self, _max_len: Option<usize>) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________________________________________________^
[INFO] [stdout] 1893 | |         Ok(None)
[INFO] [stdout] 1894 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1893:9
[INFO] [stdout]      |
[INFO] [stdout] 1893 |         Ok(None)
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1898:115
[INFO] [stdout]      |
[INFO] [stdout] 1898 |       fn next_back_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________________________________________________________^
[INFO] [stdout] 1899 | |         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1900 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout] 1901 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1899:9
[INFO] [stdout]      |
[INFO] [stdout] 1899 | /         self.next_back_slice_mut(max_len)
[INFO] [stdout] 1900 | |             .map(|mut slice| slice.take().map(|slice| &*slice))
[INFO] [stdout]      | |_______________________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1899:9
[INFO] [stdout]      |
[INFO] [stdout] 1899 |         self.next_back_slice_mut(max_len)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1908:67
[INFO] [stdout]      |
[INFO] [stdout] 1908 |       ) -> Result<Option<&'a mut [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ___________________________________________________________________^
[INFO] [stdout] 1909 | |         Ok(None)
[INFO] [stdout] 1910 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&mut [u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1909:9
[INFO] [stdout]      |
[INFO] [stdout] 1909 |         Ok(None)
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1918:70
[INFO] [stdout]      |
[INFO] [stdout] 1918 |       fn total_len(&self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________^
[INFO] [stdout] 1919 | |         Ok(0)
[INFO] [stdout] 1920 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1919:9
[INFO] [stdout]      |
[INFO] [stdout] 1919 |         Ok(0)
[INFO] [stdout]      |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1922:93
[INFO] [stdout]      |
[INFO] [stdout] 1922 |       fn all_aligned_to(&self, _alignment: usize) -> Result<bool, Self::BackendIteratorError> {
[INFO] [stdout]      |  _____________________________________________________________________________________________^
[INFO] [stdout] 1923 | |         Ok(true)
[INFO] [stdout] 1924 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:1923:9
[INFO] [stdout]      |
[INFO] [stdout] 1923 |         Ok(true)
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2586:79
[INFO] [stdout]      |
[INFO] [stdout] 2586 |       fn next_slice_len(&mut self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  _______________________________________________________________________________^
[INFO] [stdout] 2587 | |         Ok(self.remaining.min(Self::ZEROES_BUFFER.len()))
[INFO] [stdout] 2588 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2587:9
[INFO] [stdout]      |
[INFO] [stdout] 2587 |         Ok(self.remaining.min(Self::ZEROES_BUFFER.len()))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2590:72
[INFO] [stdout]      |
[INFO] [stdout] 2590 |       fn is_empty(&mut self) -> Result<bool, Self::BackendIteratorError> {
[INFO] [stdout]      |  ________________________________________________________________________^
[INFO] [stdout] 2591 | |         Ok(self.remaining == 0)
[INFO] [stdout] 2592 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2591:9
[INFO] [stdout]      |
[INFO] [stdout] 2591 |         Ok(self.remaining == 0)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2596:110
[INFO] [stdout]      |
[INFO] [stdout] 2596 |       fn next_slice(&mut self, max_len: Option<usize>) -> Result<Option<&'a [u8]>, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________________________________________________^
[INFO] [stdout] 2597 | |         if self.remaining == 0 {
[INFO] [stdout] 2598 | |             return Ok(None);
[INFO] [stdout] ...    |
[INFO] [stdout] 2604 | |         Ok(Some(&Self::ZEROES_BUFFER[..len]))
[INFO] [stdout] 2605 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2598:20
[INFO] [stdout]      |
[INFO] [stdout] 2598 |             return Ok(None);
[INFO] [stdout]      |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<&[u8]>, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2604:9
[INFO] [stdout]      |
[INFO] [stdout] 2604 |         Ok(Some(&Self::ZEROES_BUFFER[..len]))
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2622:70
[INFO] [stdout]      |
[INFO] [stdout] 2622 |       fn total_len(&self) -> Result<usize, Self::BackendIteratorError> {
[INFO] [stdout]      |  ______________________________________________________________________^
[INFO] [stdout] 2623 | |         Ok(self.remaining)
[INFO] [stdout] 2624 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2623:9
[INFO] [stdout]      |
[INFO] [stdout] 2623 |         Ok(self.remaining)
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2626:92
[INFO] [stdout]      |
[INFO] [stdout] 2626 |       fn all_aligned_to(&self, alignment: usize) -> Result<bool, Self::BackendIteratorError> {
[INFO] [stdout]      |  ____________________________________________________________________________________________^
[INFO] [stdout] 2627 | |         if alignment.is_pow2() {
[INFO] [stdout] 2628 | |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout] 2629 | |         } else {
[INFO] [stdout] ...    |
[INFO] [stdout] 2632 | |     }
[INFO] [stdout]      | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2627:9
[INFO] [stdout]      |
[INFO] [stdout] 2627 | /         if alignment.is_pow2() {
[INFO] [stdout] 2628 | |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout] 2629 | |         } else {
[INFO] [stdout] 2630 | |             Ok(self.remaining % alignment == 0)
[INFO] [stdout] 2631 | |         }
[INFO] [stdout]      | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2627:32
[INFO] [stdout]      |
[INFO] [stdout] 2627 |           if alignment.is_pow2() {
[INFO] [stdout]      |  ________________________________^
[INFO] [stdout] 2628 | |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout] 2629 | |         } else {
[INFO] [stdout]      | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2628:13
[INFO] [stdout]      |
[INFO] [stdout] 2628 |             Ok(self.remaining & (alignment - 1) == 0)
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2629:16
[INFO] [stdout]      |
[INFO] [stdout] 2629 |           } else {
[INFO] [stdout]      |  ________________^
[INFO] [stdout] 2630 | |             Ok(self.remaining % alignment == 0)
[INFO] [stdout] 2631 | |         }
[INFO] [stdout]      | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Infallible>
[INFO] [stdout]     --> src/io_slices.rs:2630:13
[INFO] [stdout]      |
[INFO] [stdout] 2630 |             Ok(self.remaining % alignment == 0)
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cocoon-tpm-utils-common` (lib test) due to 165 previous errors
[INFO] running `Command { std: "docker" "inspect" "a90459c1f2a8ed1fac817a77b1b293f323b71c2f32939ea8712993e4c4642b43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a90459c1f2a8ed1fac817a77b1b293f323b71c2f32939ea8712993e4c4642b43", kill_on_drop: false }`
[INFO] [stdout] a90459c1f2a8ed1fac817a77b1b293f323b71c2f32939ea8712993e4c4642b43
