[INFO] cloning repository https://github.com/Kevingislason/rust_bitcoin_hardware_wallet_demos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kevingislason/rust_bitcoin_hardware_wallet_demos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKevingislason%2Frust_bitcoin_hardware_wallet_demos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKevingislason%2Frust_bitcoin_hardware_wallet_demos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3f36a6b856cce40e99f81289c96a8bca040a3cb
[INFO] checking Kevingislason/rust_bitcoin_hardware_wallet_demos against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKevingislason%2Frust_bitcoin_hardware_wallet_demos" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Kevingislason/rust_bitcoin_hardware_wallet_demos
[INFO] finished tweaking git repo https://github.com/Kevingislason/rust_bitcoin_hardware_wallet_demos
[INFO] tweaked toml for git repo https://github.com/Kevingislason/rust_bitcoin_hardware_wallet_demos written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Kevingislason/rust_bitcoin_hardware_wallet_demos 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 46 packages to latest compatible versions
[INFO] [stderr]       Adding auto_ops v0.1.0 (available: v0.3.0)
[INFO] [stderr]       Adding bit-vec v0.6.3 (available: v0.8.0)
[INFO] [stderr]       Adding bitcoin v0.19.2 (available: v0.32.7)
[INFO] [stderr]       Adding cc v1.0.26 (available: v1.2.45)
[INFO] [stderr]       Adding hashbrown v0.7.2 (available: v0.16.0)
[INFO] [stderr]       Adding hmac v0.7.1 (available: v0.12.1)
[INFO] [stderr]       Adding num v0.2.1 (available: v0.4.3)
[INFO] [stderr]       Adding pbkdf2 v0.3.0 (available: v0.12.2)
[INFO] [stderr]       Adding ripemd160 v0.8.0 (available: v0.10.0)
[INFO] [stderr]       Adding sha2 v0.8.2 (available: v0.10.9)
[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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1dc1bd4dbd38f33ca5f6b06ad83fb07d9ecdfa501645a1492aba62ad508b4966
[INFO] running `Command { std: "docker" "start" "-a" "1dc1bd4dbd38f33ca5f6b06ad83fb07d9ecdfa501645a1492aba62ad508b4966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1dc1bd4dbd38f33ca5f6b06ad83fb07d9ecdfa501645a1492aba62ad508b4966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dc1bd4dbd38f33ca5f6b06ad83fb07d9ecdfa501645a1492aba62ad508b4966", kill_on_drop: false }`
[INFO] [stdout] 1dc1bd4dbd38f33ca5f6b06ad83fb07d9ecdfa501645a1492aba62ad508b4966
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 583b5475367391d95bfe1beeb056e342f313c33bf9e0bae100fa783833e87d33
[INFO] running `Command { std: "docker" "start" "-a" "583b5475367391d95bfe1beeb056e342f313c33bf9e0bae100fa783833e87d33", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking bitcoin_hashes v0.7.6
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking bech32 v0.7.3
[INFO] [stderr]     Checking bigint v4.4.3
[INFO] [stderr]     Checking genio v0.2.1
[INFO] [stderr]     Checking auto_ops v0.1.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]    Compiling secp256k1 v0.12.2
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking pbkdf2 v0.3.0
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking ripemd160 v0.8.0
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking bitcoin v0.19.2
[INFO] [stderr]     Checking rust_bitcoin_hardware_wallet_demos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[macro_use]` attribute cannot be used on macro calls
[INFO] [stdout]   --> src/ecc.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[macro_use]` can be applied to crates, extern crates, and modules
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash_160`
[INFO] [stdout]  --> src/hd_wallet.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::helpers::{hash_160, hmac_512};
[INFO] [stdout]   |                      ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryInto`
[INFO] [stdout]  --> src/helpers.rs:5:27
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::convert::{From, TryInto};
[INFO] [stdout]   |                           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_int_pow` has been stable since 1.50.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_int_pow)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[macro_use]` attribute cannot be used on macro calls
[INFO] [stdout]   --> src/ecc.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[macro_use]` can be applied to crates, extern crates, and modules
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `U256_from_hex_str`
[INFO] [stdout]  --> src/ecc.rs:9:56
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::helpers::{encode_base58_checksum, hash_160, U256_from_hex_str};
[INFO] [stdout]   |                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num::pow::pow`
[INFO] [stdout]   --> src/ecc.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use num::pow::pow;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash_160`
[INFO] [stdout]  --> src/hd_wallet.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::helpers::{hash_160, hmac_512};
[INFO] [stdout]   |                      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryInto`
[INFO] [stdout]  --> src/helpers.rs:5:27
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::convert::{From, TryInto};
[INFO] [stdout]   |                           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::hd_wallet::HDSeed`
[INFO] [stdout]  --> src/seed_phrase.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::hd_wallet::HDSeed;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_int_pow` has been stable since 1.50.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_int_pow)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Digest`
[INFO] [stdout]   --> src/ecc.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | use sha2::{Digest, Sha256};
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ecc.rs:288:13
[INFO] [stdout]     |
[INFO] [stdout] 288 |         let mut y_bytes = vec![0; 32];
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hd_wallet.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let mut hardened_children = HashMap::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hd_wallet.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let mut unhardened_children = HashMap::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extended_private_key`
[INFO] [stdout]    --> src/hd_wallet.rs:134:17
[INFO] [stdout]     |
[INFO] [stdout] 134 |     if let Some(extended_private_key) = self.hardened_children.get(&new_child_number) {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extended_private_key`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extended_private_key`
[INFO] [stdout]    --> src/hd_wallet.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |     if let Some(extended_private_key) = self.unhardened_children.get(&new_child_number) {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extended_private_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/helpers.rs:123:7
[INFO] [stdout]     |
[INFO] [stdout] 123 |   let mut combined = &combined[7..32];
[INFO] [stdout]     |       ----^^^^^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word_index`
[INFO] [stdout]   --> src/seed_phrase.rs:93:10
[INFO] [stdout]    |
[INFO] [stdout] 93 |     for (word_index, word) in self.words().iter().enumerate() {
[INFO] [stdout]    |          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ecc.rs:288:13
[INFO] [stdout]     |
[INFO] [stdout] 288 |         let mut y_bytes = vec![0; 32];
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hd_wallet.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let mut hardened_children = HashMap::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hd_wallet.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let mut unhardened_children = HashMap::new();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extended_private_key`
[INFO] [stdout]    --> src/hd_wallet.rs:134:17
[INFO] [stdout]     |
[INFO] [stdout] 134 |     if let Some(extended_private_key) = self.hardened_children.get(&new_child_number) {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extended_private_key`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extended_private_key`
[INFO] [stdout]    --> src/hd_wallet.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |     if let Some(extended_private_key) = self.unhardened_children.get(&new_child_number) {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extended_private_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/helpers.rs:123:7
[INFO] [stdout]     |
[INFO] [stdout] 123 |   let mut combined = &combined[7..32];
[INFO] [stdout]     |       ----^^^^^^^^
[INFO] [stdout]     |       |
[INFO] [stdout]     |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word_index`
[INFO] [stdout]   --> src/seed_phrase.rs:93:10
[INFO] [stdout]    |
[INFO] [stdout] 93 |     for (word_index, word) in self.words().iter().enumerate() {
[INFO] [stdout]    |          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:32:22
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let result = self::Read::read(self, &mut buf).unwrap();
[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, Void>
[INFO] [stdout]   --> src/cursor.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:50:22
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_bitcoin_hardware_wallet_demos` (bin "rust_bitcoin_hardware_wallet_demos") due to 46 previous errors; 22 warnings emitted
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:59:22
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:68:22
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Void>
[INFO] [stdout]   --> src/cursor.rs:80:76
[INFO] [stdout]    |
[INFO] [stdout] 80 |       fn fill_buf(&mut self) -> core::result::Result<&[u8], Self::ReadError> {
[INFO] [stdout]    |  ____________________________________________________________________________^
[INFO] [stdout] 81 | |         let amt = cmp::min(self.pos, self.inner.as_ref().len() as u64);
[INFO] [stdout] 82 | |         Ok(&self.inner.as_ref()[(amt as usize)..])
[INFO] [stdout] 83 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Void>
[INFO] [stdout]   --> src/cursor.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         Ok(&self.inner.as_ref()[(amt as usize)..])
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/cursor.rs:96:88
[INFO] [stdout]     |
[INFO] [stdout]  96 |       fn read(&mut self, buf: &mut [u8]) -> core::result::Result<usize, Self::ReadError> {
[INFO] [stdout]     |  ________________________________________________________________________________________^
[INFO] [stdout]  97 | |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]  98 | |         self.pos += n as u64;
[INFO] [stdout]  99 | |         Ok(n)
[INFO] [stdout] 100 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Void>, usize>
[INFO] [stdout]   --> src/cursor.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Void>, &[u8]>
[INFO] [stdout]   --> src/cursor.rs:97:40
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Void>
[INFO] [stdout]   --> src/cursor.rs:97:40
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:97:40
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         Ok(n)
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/ecc.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     &self.num.to_big_endian(&mut num_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let _ = &self.num.to_big_endian(&mut num_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/ecc.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     &self.prime.to_big_endian(&mut vec_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let _ = &self.prime.to_big_endian(&mut vec_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:248:5
[INFO] [stdout]     |
[INFO] [stdout] 248 |     reader.read_exact(&mut version_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |     let _ = reader.read_exact(&mut version_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:250:5
[INFO] [stdout]     |
[INFO] [stdout] 250 |     reader.read_exact(&mut fingerprint_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 250 |     let _ = reader.read_exact(&mut fingerprint_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:252:5
[INFO] [stdout]     |
[INFO] [stdout] 252 |     reader.read_exact(&mut chain_code_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 252 |     let _ = reader.read_exact(&mut chain_code_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:253:5
[INFO] [stdout]     |
[INFO] [stdout] 253 |     reader.read_exact(&mut private_key_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 253 |     let _ = reader.read_exact(&mut private_key_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:136:3
[INFO] [stdout]     |
[INFO] [stdout] 136 |   cursor.read(&mut buffer).unwrap();
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:150:5
[INFO] [stdout]     |
[INFO] [stdout] 150 |     serialization.write_u16_little_endian(i as u16).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 |     serialization.write_u32_little_endian(i as u32).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:162:5
[INFO] [stdout]     |
[INFO] [stdout] 162 |     serialization.write_u64_little_endian(i as u64).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `U256_from_hex_str` should have a snake case name
[INFO] [stdout]    --> src/helpers.rs:170:8
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub fn U256_from_hex_str(hex_str: &str) -> U256 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `u256_from_hex_str`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:18:113
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn write_u16_little_endian(&mut self, number: u16) -> Result<usize, <Serialization as Write>::WriteError> {
[INFO] [stdout]    |  _________________________________________________________________________________________________________________^
[INFO] [stdout] 19 | |     let buf = number.to_le_bytes();
[INFO] [stdout] 20 | |     return self::Write::write(self, &buf)
[INFO] [stdout] 21 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     return self::Write::write(self, &buf)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:23:113
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn write_u32_little_endian(&mut self, number: u32) -> Result<usize, <Serialization as Write>::WriteError> {
[INFO] [stdout]    |  _________________________________________________________________________________________________________________^
[INFO] [stdout] 24 | |     let buf = number.to_le_bytes();
[INFO] [stdout] 25 | |     return self::Write::write(self, &buf)
[INFO] [stdout] 26 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     return self::Write::write(self, &buf)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:28:113
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn write_u64_little_endian(&mut self, number: u64) -> Result<usize, <Serialization as Write>::WriteError> {
[INFO] [stdout]    |  _________________________________________________________________________________________________________________^
[INFO] [stdout] 29 | |     let buf = number.to_le_bytes();
[INFO] [stdout] 30 | |     return self::Write::write(self, &buf)
[INFO] [stdout] 31 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     return self::Write::write(self, &buf)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:39:70
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn write(&mut self, buf: &[u8]) -> Result<usize, Self::WriteError> {
[INFO] [stdout]    |  ______________________________________________________________________^
[INFO] [stdout] 40 | |       self.contents.extend_from_slice(buf);
[INFO] [stdout] 41 | |       Ok(buf.len())
[INFO] [stdout] 42 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 |       Ok(buf.len())
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     serialization.write_u32_little_endian(self.version).unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | /     serialization
[INFO] [stdout] 70 | |       .write(&encode_varint(self.tx_ins.len() as u64))
[INFO] [stdout]    | |______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 73 |       serialization.write(&tx_in.serialize()).unwrap();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | /     serialization
[INFO] [stdout] 76 | |       .write(&encode_varint(self.tx_outs.len() as u64))
[INFO] [stdout]    | |_______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:79:7
[INFO] [stdout]    |
[INFO] [stdout] 79 |       serialization.write(&tx_out.serialize()).unwrap();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     serialization
[INFO] [stdout] 82 | |       .write_u32_little_endian(self.locktime)
[INFO] [stdout]    | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |     serialization.write_u32_little_endian(self.version).unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | /     serialization
[INFO] [stdout] 92 | |       .write(&encode_varint(self.tx_ins.len() as u64))
[INFO] [stdout]    | |______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:107:7
[INFO] [stdout]     |
[INFO] [stdout] 107 |       serialization.write(&altered_tx_in.serialize()).unwrap();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | /     serialization
[INFO] [stdout] 110 | |       .write(&encode_varint(self.tx_outs.len() as u64))
[INFO] [stdout]     | |_______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:114:7
[INFO] [stdout]     |
[INFO] [stdout] 114 |       serialization.write(&tx_out.serialize()).unwrap();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 | /     serialization
[INFO] [stdout] 117 | |       .write_u32_little_endian(self.locktime)
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 | /     serialization
[INFO] [stdout] 121 | |       .write_u32_little_endian(SIGHASH_ALL as u32)
[INFO] [stdout]     | |__________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 |     serialization.write(&buf).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 | /     serialization
[INFO] [stdout] 197 | |       .write_u32_little_endian(self.prev_index)
[INFO] [stdout]     | |_______________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     serialization.write(&self.script_sig.serialize()).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:201:5
[INFO] [stdout]     |
[INFO] [stdout] 201 | /     serialization
[INFO] [stdout] 202 | |       .write_u32_little_endian(self.sequence)
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:243:5
[INFO] [stdout]     |
[INFO] [stdout] 243 |     serialization.write_u64_little_endian(self.amount).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:244:5
[INFO] [stdout]     |
[INFO] [stdout] 244 | /     serialization
[INFO] [stdout] 245 | |       .write(&self.script_pubkey.serialize())
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:32:22
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let result = self::Read::read(self, &mut buf).unwrap();
[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, Void>
[INFO] [stdout]   --> src/cursor.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:50:22
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:59:22
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:68:22
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let result = self::Read::read(self, &mut buf).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Void>
[INFO] [stdout]   --> src/cursor.rs:80:76
[INFO] [stdout]    |
[INFO] [stdout] 80 |       fn fill_buf(&mut self) -> core::result::Result<&[u8], Self::ReadError> {
[INFO] [stdout]    |  ____________________________________________________________________________^
[INFO] [stdout] 81 | |         let amt = cmp::min(self.pos, self.inner.as_ref().len() as u64);
[INFO] [stdout] 82 | |         Ok(&self.inner.as_ref()[(amt as usize)..])
[INFO] [stdout] 83 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Void>
[INFO] [stdout]   --> src/cursor.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         Ok(&self.inner.as_ref()[(amt as usize)..])
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/cursor.rs:96:88
[INFO] [stdout]     |
[INFO] [stdout]  96 |       fn read(&mut self, buf: &mut [u8]) -> core::result::Result<usize, Self::ReadError> {
[INFO] [stdout]     |  ________________________________________________________________________________________^
[INFO] [stdout]  97 | |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]  98 | |         self.pos += n as u64;
[INFO] [stdout]  99 | |         Ok(n)
[INFO] [stdout] 100 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Void>, usize>
[INFO] [stdout]   --> src/cursor.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Void>, &[u8]>
[INFO] [stdout]   --> src/cursor.rs:97:40
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Void>
[INFO] [stdout]   --> src/cursor.rs:97:40
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:97:40
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let n = genio::Read::read(&mut self.fill_buf()?, buf)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/cursor.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         Ok(n)
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/ecc.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     &self.num.to_big_endian(&mut num_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let _ = &self.num.to_big_endian(&mut num_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/ecc.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     &self.prime.to_big_endian(&mut vec_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let _ = &self.prime.to_big_endian(&mut vec_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:248:5
[INFO] [stdout]     |
[INFO] [stdout] 248 |     reader.read_exact(&mut version_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |     let _ = reader.read_exact(&mut version_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:250:5
[INFO] [stdout]     |
[INFO] [stdout] 250 |     reader.read_exact(&mut fingerprint_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 250 |     let _ = reader.read_exact(&mut fingerprint_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:252:5
[INFO] [stdout]     |
[INFO] [stdout] 252 |     reader.read_exact(&mut chain_code_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 252 |     let _ = reader.read_exact(&mut chain_code_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/hd_wallet.rs:253:5
[INFO] [stdout]     |
[INFO] [stdout] 253 |     reader.read_exact(&mut private_key_bytes);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 253 |     let _ = reader.read_exact(&mut private_key_bytes);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:136:3
[INFO] [stdout]     |
[INFO] [stdout] 136 |   cursor.read(&mut buffer).unwrap();
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:150:5
[INFO] [stdout]     |
[INFO] [stdout] 150 |     serialization.write_u16_little_endian(i as u16).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 |     serialization.write_u32_little_endian(i as u32).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/helpers.rs:162:5
[INFO] [stdout]     |
[INFO] [stdout] 162 |     serialization.write_u64_little_endian(i as u64).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `U256_from_hex_str` should have a snake case name
[INFO] [stdout]    --> src/helpers.rs:170:8
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub fn U256_from_hex_str(hex_str: &str) -> U256 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `u256_from_hex_str`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_U256_from_hex_str` should have a snake case name
[INFO] [stdout]    --> src/helpers.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub fn test_U256_from_hex_str() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `test_u256_from_hex_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `max_U256` should have a snake case name
[INFO] [stdout]    --> src/helpers.rs:178:7
[INFO] [stdout]     |
[INFO] [stdout] 178 |   let max_U256 = U256::MAX;
[INFO] [stdout]     |       ^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `max_u256`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `U256_max_str` should have a snake case name
[INFO] [stdout]    --> src/helpers.rs:179:7
[INFO] [stdout]     |
[INFO] [stdout] 179 |   let U256_max_str = &"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff";
[INFO] [stdout]     |       ^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `u256_max_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:18:113
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn write_u16_little_endian(&mut self, number: u16) -> Result<usize, <Serialization as Write>::WriteError> {
[INFO] [stdout]    |  _________________________________________________________________________________________________________________^
[INFO] [stdout] 19 | |     let buf = number.to_le_bytes();
[INFO] [stdout] 20 | |     return self::Write::write(self, &buf)
[INFO] [stdout] 21 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     return self::Write::write(self, &buf)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:23:113
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn write_u32_little_endian(&mut self, number: u32) -> Result<usize, <Serialization as Write>::WriteError> {
[INFO] [stdout]    |  _________________________________________________________________________________________________________________^
[INFO] [stdout] 24 | |     let buf = number.to_le_bytes();
[INFO] [stdout] 25 | |     return self::Write::write(self, &buf)
[INFO] [stdout] 26 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     return self::Write::write(self, &buf)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:28:113
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn write_u64_little_endian(&mut self, number: u64) -> Result<usize, <Serialization as Write>::WriteError> {
[INFO] [stdout]    |  _________________________________________________________________________________________________________________^
[INFO] [stdout] 29 | |     let buf = number.to_le_bytes();
[INFO] [stdout] 30 | |     return self::Write::write(self, &buf)
[INFO] [stdout] 31 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     return self::Write::write(self, &buf)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:39:70
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn write(&mut self, buf: &[u8]) -> Result<usize, Self::WriteError> {
[INFO] [stdout]    |  ______________________________________________________________________^
[INFO] [stdout] 40 | |       self.contents.extend_from_slice(buf);
[INFO] [stdout] 41 | |       Ok(buf.len())
[INFO] [stdout] 42 | |   }
[INFO] [stdout]    | |___^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/serialization.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 |       Ok(buf.len())
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     serialization.write_u32_little_endian(self.version).unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 | /     serialization
[INFO] [stdout] 70 | |       .write(&encode_varint(self.tx_ins.len() as u64))
[INFO] [stdout]    | |______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 73 |       serialization.write(&tx_in.serialize()).unwrap();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | /     serialization
[INFO] [stdout] 76 | |       .write(&encode_varint(self.tx_outs.len() as u64))
[INFO] [stdout]    | |_______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:79:7
[INFO] [stdout]    |
[INFO] [stdout] 79 |       serialization.write(&tx_out.serialize()).unwrap();
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     serialization
[INFO] [stdout] 82 | |       .write_u32_little_endian(self.locktime)
[INFO] [stdout]    | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |     serialization.write_u32_little_endian(self.version).unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]   --> src/tx.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | /     serialization
[INFO] [stdout] 92 | |       .write(&encode_varint(self.tx_ins.len() as u64))
[INFO] [stdout]    | |______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:107:7
[INFO] [stdout]     |
[INFO] [stdout] 107 |       serialization.write(&altered_tx_in.serialize()).unwrap();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | /     serialization
[INFO] [stdout] 110 | |       .write(&encode_varint(self.tx_outs.len() as u64))
[INFO] [stdout]     | |_______________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:114:7
[INFO] [stdout]     |
[INFO] [stdout] 114 |       serialization.write(&tx_out.serialize()).unwrap();
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 | /     serialization
[INFO] [stdout] 117 | |       .write_u32_little_endian(self.locktime)
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 | /     serialization
[INFO] [stdout] 121 | |       .write_u32_little_endian(SIGHASH_ALL as u32)
[INFO] [stdout]     | |__________________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 |     serialization.write(&buf).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 | /     serialization
[INFO] [stdout] 197 | |       .write_u32_little_endian(self.prev_index)
[INFO] [stdout]     | |_______________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     serialization.write(&self.script_sig.serialize()).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:201:5
[INFO] [stdout]     |
[INFO] [stdout] 201 | /     serialization
[INFO] [stdout] 202 | |       .write_u32_little_endian(self.sequence)
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:243:5
[INFO] [stdout]     |
[INFO] [stdout] 243 |     serialization.write_u64_little_endian(self.amount).unwrap();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Void>
[INFO] [stdout]    --> src/tx.rs:244:5
[INFO] [stdout]     |
[INFO] [stdout] 244 | /     serialization
[INFO] [stdout] 245 | |       .write(&self.script_pubkey.serialize())
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_bitcoin_hardware_wallet_demos` (bin "rust_bitcoin_hardware_wallet_demos" test) due to 46 previous errors; 21 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "583b5475367391d95bfe1beeb056e342f313c33bf9e0bae100fa783833e87d33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "583b5475367391d95bfe1beeb056e342f313c33bf9e0bae100fa783833e87d33", kill_on_drop: false }`
[INFO] [stdout] 583b5475367391d95bfe1beeb056e342f313c33bf9e0bae100fa783833e87d33