[INFO] cloning repository https://github.com/ariefbraja/pay-to-sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ariefbraja/pay-to-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fariefbraja%2Fpay-to-sudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fariefbraja%2Fpay-to-sudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80a5a89af8d8318721dd2479d89aa473f5d10b17
[INFO] checking ariefbraja/pay-to-sudoku against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fariefbraja%2Fpay-to-sudoku" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
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[INFO] removed /workspace/builds/worker-5-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/ariefbraja/pay-to-sudoku
[INFO] finished tweaking git repo https://github.com/ariefbraja/pay-to-sudoku
[INFO] tweaked toml for git repo https://github.com/ariefbraja/pay-to-sudoku written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ariefbraja/pay-to-sudoku on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ariefbraja/pay-to-sudoku 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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] help: build is a valid .cargo/config.toml key
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c89ac05b8a41f119a8d3407fb8f47410e942ba5ccb6f75ff86491591a19f66b
[INFO] running `Command { std: "docker" "start" "-a" "8c89ac05b8a41f119a8d3407fb8f47410e942ba5ccb6f75ff86491591a19f66b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c89ac05b8a41f119a8d3407fb8f47410e942ba5ccb6f75ff86491591a19f66b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c89ac05b8a41f119a8d3407fb8f47410e942ba5ccb6f75ff86491591a19f66b", kill_on_drop: false }`
[INFO] [stdout] 8c89ac05b8a41f119a8d3407fb8f47410e942ba5ccb6f75ff86491591a19f66b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7bb264b235bda0deb690f0530f313f15e32e97d38c998dcdba22f28bf05cd99
[INFO] running `Command { std: "docker" "start" "-a" "e7bb264b235bda0deb690f0530f313f15e32e97d38c998dcdba22f28bf05cd99", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] help: build is a valid .cargo/config.toml key
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]    Compiling pkg-config v0.3.32
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking traitobject v0.0.1
[INFO] [stderr]     Checking unicode-width v0.1.14
[INFO] [stderr]     Checking language-tags v0.0.7
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking byteorder v0.4.2
[INFO] [stderr]     Checking encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]     Checking encoding-index-japanese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]    Compiling pay-to-sudoku v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling cc v1.2.20
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking whiteread v0.2.0
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking hex v0.1.0
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling num-bigint v0.1.45
[INFO] [stderr]    Compiling num-complex v0.1.44
[INFO] [stderr]    Compiling num-rational v0.1.43
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking hpack v0.2.0
[INFO] [stderr]     Checking encoding v0.2.33
[INFO] [stderr]     Checking solicit v0.4.4
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling bzip2-sys v0.1.13+1.0.8
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking flate2 v0.2.20
[INFO] [stderr]     Checking uuid v0.1.18
[INFO] [stderr]     Checking url v0.2.38
[INFO] [stderr]     Checking bzip2 v0.2.4
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking cookie v0.1.21
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num v0.1.43
[INFO] [stderr]     Checking serde v0.6.15
[INFO] [stderr]     Checking mime v0.1.3
[INFO] [stderr]     Checking strason v0.3.4
[INFO] [stderr]     Checking bincode v0.4.1
[INFO] [stderr]     Checking hyper v0.6.16
[INFO] [stderr]     Checking jsonrpc v0.7.6
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/main.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[macro_use] extern crate jsonrpc;
[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 imports: `Read`, `Write`, and `self`
[INFO] [stdout]   --> src/main.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::io::{self, Read, Write};
[INFO] [stdout]    |               ^^^^  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromHex`
[INFO] [stdout]   --> src/main.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 | use hex::{ToHex, FromHex};
[INFO] [stdout]    |                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Sudoku`
[INFO] [stdout]    --> src/sudoku.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |     use super::Sudoku;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]    --> src/sudoku.rs:243:9
[INFO] [stdout]     |
[INFO] [stdout] 243 |     use test::Bencher;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/ffi.rs:22:53
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn gen_keypair(n: uint32_t, h: *mut c_void, cb: extern fn(*mut c_void, *const c_char, size_t, *const c_char, size_t));
[INFO] [stdout]    |                                                     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/ffi.rs:26:22
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                      ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde`
[INFO] [stdout]  --> src/bitcoin.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ToHex`
[INFO] [stdout]  --> src/bitcoin.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | use hex::{ToHex, FromHex};
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:193:5
[INFO] [stdout]     |
[INFO] [stdout] 193 |     try!(serialize_into(stream, &puzzle, Infinite));
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:197:28
[INFO] [stdout]     |
[INFO] [stdout] 197 |     let proof: Cow<[u8]> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:198:41
[INFO] [stdout]     |
[INFO] [stdout] 198 |     let encrypted_solution: Cow<[u8]> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:200:33
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let mut h_of_key: Vec<u8> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         try!(serialize_into(stream, &redeem_pubkey, Infinite));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:214:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |         try!(serialize_into(stream, &cltv_height, Infinite));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:216:38
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let solving_pubkey: String = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:310:28
[INFO] [stdout]     |
[INFO] [stdout] 310 |                         if (rx.lock().unwrap().try_recv().is_ok()) {
[INFO] [stdout]     |                            ^                                     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 310 -                         if (rx.lock().unwrap().try_recv().is_ok()) {
[INFO] [stdout] 310 +                         if rx.lock().unwrap().try_recv().is_ok() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]  --> src/ffi.rs:8:28
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libc::{size_t, c_char, uint8_t, uint32_t, int32_t, c_void};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]  --> src/ffi.rs:8:37
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libc::{size_t, c_char, uint8_t, uint32_t, int32_t, c_void};
[INFO] [stdout]   |                                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]  --> src/ffi.rs:8:47
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libc::{size_t, c_char, uint8_t, uint32_t, int32_t, c_void};
[INFO] [stdout]   |                                               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:44:57
[INFO] [stdout]    |
[INFO] [stdout] 44 | extern "C" fn handle_proof_callback(cb: *mut c_void, n: uint32_t, encrypted_solution: *const uint8_t, proof: *const c_char, proof_le...
[INFO] [stdout]    |                                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:44:94
[INFO] [stdout]    |
[INFO] [stdout] 44 | extern "C" fn handle_proof_callback(cb: *mut c_void, n: uint32_t, encrypted_solution: *const uint8_t, proof: *const c_char, proof_le...
[INFO] [stdout]    |                                                                                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:44:136
[INFO] [stdout]    |
[INFO] [stdout] 44 | ...d_solution: *const uint8_t, proof: *const c_char, proof_len: int32_t)
[INFO] [stdout]    |                                                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]    --> src/ffi.rs:119:80
[INFO] [stdout]     |
[INFO] [stdout] 119 |     unsafe { snark_verify(ctx.keypair, ctx.n as u32, &proof[0], proof.len() as int32_t, &puzzle[0], &h_of_key[0], &encrypted_soluti...
[INFO] [stdout]     |                                                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:22:23
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn gen_keypair(n: uint32_t, h: *mut c_void, cb: extern fn(*mut c_void, *const c_char, size_t, *const c_char, size_t));
[INFO] [stdout]    |                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:23:48
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn load_keypair(pk_s: *const c_char, pk_l: int32_t, vk_s: *const c_char, vk_l: int32_t)
[INFO] [stdout]    |                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:23:84
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn load_keypair(pk_s: *const c_char, pk_l: int32_t, vk_s: *const c_char, vk_l: int32_t)
[INFO] [stdout]    |                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:26:45
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:26:62
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                                                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:26:86
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                                                                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |                  n: uint32_t, puzzle: *const uint8_t, solution: *const uint8_t,
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:27:46
[INFO] [stdout]    |
[INFO] [stdout] 27 |                  n: uint32_t, puzzle: *const uint8_t, solution: *const uint8_t,
[INFO] [stdout]    |                                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:27:72
[INFO] [stdout]    |
[INFO] [stdout] 27 |                  n: uint32_t, puzzle: *const uint8_t, solution: *const uint8_t,
[INFO] [stdout]    |                                                                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:28:30
[INFO] [stdout]    |
[INFO] [stdout] 28 |                  key: *const uint8_t, h_of_key: *const uint8_t) -> bool;
[INFO] [stdout]    |                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:28:56
[INFO] [stdout]    |
[INFO] [stdout] 28 |                  key: *const uint8_t, h_of_key: *const uint8_t) -> bool;
[INFO] [stdout]    |                                                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:29:28
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn decrypt_solution(n: uint32_t, enc: *mut uint8_t, key: *const uint8_t);
[INFO] [stdout]    |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:29:48
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn decrypt_solution(n: uint32_t, enc: *mut uint8_t, key: *const uint8_t);
[INFO] [stdout]    |                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:29:69
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn decrypt_solution(n: uint32_t, enc: *mut uint8_t, key: *const uint8_t);
[INFO] [stdout]    |                                                                     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:31:24
[INFO] [stdout]    |
[INFO] [stdout] 31 |                     n: uint32_t,
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:32:35
[INFO] [stdout]    |
[INFO] [stdout] 32 |                     proof: *const uint8_t,
[INFO] [stdout]    |                                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:33:32
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     proof_len: int32_t,
[INFO] [stdout]    |                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:34:36
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     puzzle: *const uint8_t,
[INFO] [stdout]    |                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     h_of_key: *const uint8_t,
[INFO] [stdout]    |                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:36:42
[INFO] [stdout]    |
[INFO] [stdout] 36 |                     enc_solution: *const uint8_t
[INFO] [stdout]    |                                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/main.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #[macro_use] extern crate jsonrpc;
[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 imports: `Read`, `Write`, and `self`
[INFO] [stdout]   --> src/main.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::io::{self, Read, Write};
[INFO] [stdout]    |               ^^^^  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromHex`
[INFO] [stdout]   --> src/main.rs:25:18
[INFO] [stdout]    |
[INFO] [stdout] 25 | use hex::{ToHex, FromHex};
[INFO] [stdout]    |                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/ffi.rs:22:53
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn gen_keypair(n: uint32_t, h: *mut c_void, cb: extern fn(*mut c_void, *const c_char, size_t, *const c_char, size_t));
[INFO] [stdout]    |                                                     ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(missing_abi)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` declarations without an explicit ABI are deprecated
[INFO] [stdout]   --> src/ffi.rs:26:22
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                      ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde`
[INFO] [stdout]  --> src/bitcoin.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ToHex`
[INFO] [stdout]  --> src/bitcoin.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | use hex::{ToHex, FromHex};
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:193:5
[INFO] [stdout]     |
[INFO] [stdout] 193 |     try!(serialize_into(stream, &puzzle, Infinite));
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:197:28
[INFO] [stdout]     |
[INFO] [stdout] 197 |     let proof: Cow<[u8]> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:198:41
[INFO] [stdout]     |
[INFO] [stdout] 198 |     let encrypted_solution: Cow<[u8]> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:200:33
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let mut h_of_key: Vec<u8> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:213:9
[INFO] [stdout]     |
[INFO] [stdout] 213 |         try!(serialize_into(stream, &redeem_pubkey, Infinite));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:214:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |         try!(serialize_into(stream, &cltv_height, Infinite));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:216:38
[INFO] [stdout]     |
[INFO] [stdout] 216 |         let solving_pubkey: String = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/main.rs:310:28
[INFO] [stdout]     |
[INFO] [stdout] 310 |                         if (rx.lock().unwrap().try_recv().is_ok()) {
[INFO] [stdout]     |                            ^                                     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 310 -                         if (rx.lock().unwrap().try_recv().is_ok()) {
[INFO] [stdout] 310 +                         if rx.lock().unwrap().try_recv().is_ok() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]  --> src/ffi.rs:8:28
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libc::{size_t, c_char, uint8_t, uint32_t, int32_t, c_void};
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]  --> src/ffi.rs:8:37
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libc::{size_t, c_char, uint8_t, uint32_t, int32_t, c_void};
[INFO] [stdout]   |                                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]  --> src/ffi.rs:8:47
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libc::{size_t, c_char, uint8_t, uint32_t, int32_t, c_void};
[INFO] [stdout]   |                                               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:44:57
[INFO] [stdout]    |
[INFO] [stdout] 44 | extern "C" fn handle_proof_callback(cb: *mut c_void, n: uint32_t, encrypted_solution: *const uint8_t, proof: *const c_char, proof_le...
[INFO] [stdout]    |                                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:44:94
[INFO] [stdout]    |
[INFO] [stdout] 44 | extern "C" fn handle_proof_callback(cb: *mut c_void, n: uint32_t, encrypted_solution: *const uint8_t, proof: *const c_char, proof_le...
[INFO] [stdout]    |                                                                                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:44:136
[INFO] [stdout]    |
[INFO] [stdout] 44 | ...d_solution: *const uint8_t, proof: *const c_char, proof_len: int32_t)
[INFO] [stdout]    |                                                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]    --> src/ffi.rs:119:80
[INFO] [stdout]     |
[INFO] [stdout] 119 |     unsafe { snark_verify(ctx.keypair, ctx.n as u32, &proof[0], proof.len() as int32_t, &puzzle[0], &h_of_key[0], &encrypted_soluti...
[INFO] [stdout]     |                                                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:22:23
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn gen_keypair(n: uint32_t, h: *mut c_void, cb: extern fn(*mut c_void, *const c_char, size_t, *const c_char, size_t));
[INFO] [stdout]    |                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:23:48
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn load_keypair(pk_s: *const c_char, pk_l: int32_t, vk_s: *const c_char, vk_l: int32_t)
[INFO] [stdout]    |                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:23:84
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn load_keypair(pk_s: *const c_char, pk_l: int32_t, vk_s: *const c_char, vk_l: int32_t)
[INFO] [stdout]    |                                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:26:45
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:26:62
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                                                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:26:86
[INFO] [stdout]    |
[INFO] [stdout] 26 |                  cb: extern fn(*mut c_void, uint32_t, *const uint8_t, *const c_char, int32_t), 
[INFO] [stdout]    |                                                                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |                  n: uint32_t, puzzle: *const uint8_t, solution: *const uint8_t,
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:27:46
[INFO] [stdout]    |
[INFO] [stdout] 27 |                  n: uint32_t, puzzle: *const uint8_t, solution: *const uint8_t,
[INFO] [stdout]    |                                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:27:72
[INFO] [stdout]    |
[INFO] [stdout] 27 |                  n: uint32_t, puzzle: *const uint8_t, solution: *const uint8_t,
[INFO] [stdout]    |                                                                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:28:30
[INFO] [stdout]    |
[INFO] [stdout] 28 |                  key: *const uint8_t, h_of_key: *const uint8_t) -> bool;
[INFO] [stdout]    |                              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:28:56
[INFO] [stdout]    |
[INFO] [stdout] 28 |                  key: *const uint8_t, h_of_key: *const uint8_t) -> bool;
[INFO] [stdout]    |                                                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:29:28
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn decrypt_solution(n: uint32_t, enc: *mut uint8_t, key: *const uint8_t);
[INFO] [stdout]    |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:29:48
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn decrypt_solution(n: uint32_t, enc: *mut uint8_t, key: *const uint8_t);
[INFO] [stdout]    |                                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:29:69
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn decrypt_solution(n: uint32_t, enc: *mut uint8_t, key: *const uint8_t);
[INFO] [stdout]    |                                                                     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint32_t`: Use u32 instead.
[INFO] [stdout]   --> src/ffi.rs:31:24
[INFO] [stdout]    |
[INFO] [stdout] 31 |                     n: uint32_t,
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:32:35
[INFO] [stdout]    |
[INFO] [stdout] 32 |                     proof: *const uint8_t,
[INFO] [stdout]    |                                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::int32_t`: Use i32 instead.
[INFO] [stdout]   --> src/ffi.rs:33:32
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     proof_len: int32_t,
[INFO] [stdout]    |                                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:34:36
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     puzzle: *const uint8_t,
[INFO] [stdout]    |                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     h_of_key: *const uint8_t,
[INFO] [stdout]    |                                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `libc::uint8_t`: Use u8 instead.
[INFO] [stdout]   --> src/ffi.rs:36:42
[INFO] [stdout]    |
[INFO] [stdout] 36 |                     enc_solution: *const uint8_t
[INFO] [stdout]    |                                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:50:32
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let closure: &mut &mut for<'a> FnMut(&'a [u8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let closure: &mut &mut dyn for<'a> FnMut(&'a [u8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:62:32
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let closure: &mut &mut for<'a> FnMut(&'a [i8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let closure: &mut &mut dyn for<'a> FnMut(&'a [i8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:69:22
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut cb: &mut for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut cb: &mut dyn for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:93:22
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut cb: &mut for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut cb: &mut dyn for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:50:32
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let closure: &mut &mut for<'a> FnMut(&'a [u8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let closure: &mut &mut dyn for<'a> FnMut(&'a [u8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:62:32
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let closure: &mut &mut for<'a> FnMut(&'a [i8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let closure: &mut &mut dyn for<'a> FnMut(&'a [i8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:69:22
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut cb: &mut for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut cb: &mut dyn for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:93:22
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut cb: &mut for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let mut cb: &mut dyn for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dimension`
[INFO] [stdout]   --> src/sudoku.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn new(dimension: usize) -> Possible {
[INFO] [stdout]    |            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dimension`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sudoku.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let mut grid = Sudoku::new(n);
[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: unused variable: `undo`
[INFO] [stdout]    --> src/sudoku.rs:218:21
[INFO] [stdout]     |
[INFO] [stdout] 218 |                 let undo = cell.set(candidate);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_undo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dimension`
[INFO] [stdout]   --> src/sudoku.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn new(dimension: usize) -> Possible {
[INFO] [stdout]    |            ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dimension`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sudoku.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let mut grid = Sudoku::new(n);
[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: unused variable: `res`
[INFO] [stdout]   --> src/bitcoin.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let res = client.send_request(&request).unwrap();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/bitcoin.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |     let res = client.send_request(&request).unwrap();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `undo`
[INFO] [stdout]    --> src/sudoku.rs:218:21
[INFO] [stdout]     |
[INFO] [stdout] 218 |                 let undo = cell.set(candidate);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_undo`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/bitcoin.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 181 |     let res = client.send_request(&request).unwrap();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `solution`
[INFO] [stdout]    --> src/sudoku.rs:249:17
[INFO] [stdout]     |
[INFO] [stdout] 249 |             let solution = Sudoku::import_and_solve(8, &puzzle);
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_solution`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `encrypted_solution`
[INFO] [stdout]    --> src/main.rs:178:16
[INFO] [stdout]     |
[INFO] [stdout] 178 |               |encrypted_solution, proof| {}));
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_encrypted_solution`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `proof`
[INFO] [stdout]    --> src/main.rs:178:36
[INFO] [stdout]     |
[INFO] [stdout] 178 |               |encrypted_solution, proof| {}));
[INFO] [stdout]     |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_proof`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let mut h_of_key: Vec<u8> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |         ----^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/bitcoin.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let res = client.send_request(&request).unwrap();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/bitcoin.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 146 |     let res = client.send_request(&request).unwrap();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/bitcoin.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 181 |     let res = client.send_request(&request).unwrap();
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:323:13
[INFO] [stdout]     |
[INFO] [stdout] 323 |         let mut txid;
[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/main.rs:324:13
[INFO] [stdout]     |
[INFO] [stdout] 324 |         let mut vout;
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/main.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 351 |     fn from(a: bincode::serde::SerializeError) -> ProtoError {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/main.rs:357:13
[INFO] [stdout]     |
[INFO] [stdout] 357 |     fn from(a: bincode::serde::DeserializeError) -> ProtoError {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/sudoku.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout]  82 | impl Sudoku {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub fn print(&self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_sudoku_from_stdin` is never used
[INFO] [stdout]   --> src/util.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn get_sudoku_from_stdin(dimension: usize) -> Vec<u8> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `encrypted_solution`
[INFO] [stdout]    --> src/main.rs:178:16
[INFO] [stdout]     |
[INFO] [stdout] 178 |               |encrypted_solution, proof| {}));
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_encrypted_solution`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `proof`
[INFO] [stdout]    --> src/main.rs:178:36
[INFO] [stdout]     |
[INFO] [stdout] 178 |               |encrypted_solution, proof| {}));
[INFO] [stdout]     |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_proof`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let mut h_of_key: Vec<u8> = try!(deserialize_from(stream, Infinite));
[INFO] [stdout]     |         ----^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |         handle_server(&mut stream, &ctx, n, &mut rpc);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[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] 117 |         let _ = handle_server(&mut stream, &ctx, n, &mut rpc);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:141:21
[INFO] [stdout]     |
[INFO] [stdout] 141 |                     handle_client(&mut stream, &ctx, n, &mut rpc);
[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] 141 |                     let _ = handle_client(&mut stream, &ctx, n, &mut rpc);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:275:9
[INFO] [stdout]     |
[INFO] [stdout] 275 |         serialize_into(stream, &proof, Infinite);
[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] 275 |         let _ = serialize_into(stream, &proof, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |         serialize_into(stream, &encrypted_solution, Infinite);
[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] 276 |         let _ = serialize_into(stream, &encrypted_solution, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |         serialize_into(stream, &h_of_key, Infinite);
[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] 277 |         let _ = serialize_into(stream, &h_of_key, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 288 |         serialize_into(stream, &solving_pubkey, Infinite);
[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] 288 |         let _ = serialize_into(stream, &solving_pubkey, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:317:17
[INFO] [stdout]     |
[INFO] [stdout] 317 |                 tx.send(());
[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] 317 |                 let _ = tx.send(());
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/sudoku.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         grid.solve(&mut rng);
[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] 88 |         let _ = grid.solve(&mut rng);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `Keypair`, which is not FFI-safe
[INFO] [stdout]   --> src/ffi.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |         -> *const Keypair;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/ffi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Keypair;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `Keypair`, which is not FFI-safe
[INFO] [stdout]   --> src/ffi.rs:25:27
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn gen_proof(keypair: *const Keypair, h: *mut c_void,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/ffi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Keypair;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `Keypair`, which is not FFI-safe
[INFO] [stdout]   --> src/ffi.rs:30:30
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn snark_verify(keypair: *const Keypair,
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/ffi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Keypair;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/util.rs:64:17
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 decoder.finish();
[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] 64 |                 let _ = decoder.finish();
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:323:13
[INFO] [stdout]     |
[INFO] [stdout] 323 |         let mut txid;
[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/main.rs:324:13
[INFO] [stdout]     |
[INFO] [stdout] 324 |         let mut vout;
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/main.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 351 |     fn from(a: bincode::serde::SerializeError) -> ProtoError {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/main.rs:357:13
[INFO] [stdout]     |
[INFO] [stdout] 357 |     fn from(a: bincode::serde::DeserializeError) -> ProtoError {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/sudoku.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout]  82 | impl Sudoku {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 164 |     pub fn print(&self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_sudoku_from_stdin` is never used
[INFO] [stdout]   --> src/util.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn get_sudoku_from_stdin(dimension: usize) -> Vec<u8> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |         handle_server(&mut stream, &ctx, n, &mut rpc);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[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] 117 |         let _ = handle_server(&mut stream, &ctx, n, &mut rpc);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:141:21
[INFO] [stdout]     |
[INFO] [stdout] 141 |                     handle_client(&mut stream, &ctx, n, &mut rpc);
[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] 141 |                     let _ = handle_client(&mut stream, &ctx, n, &mut rpc);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:275:9
[INFO] [stdout]     |
[INFO] [stdout] 275 |         serialize_into(stream, &proof, Infinite);
[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] 275 |         let _ = serialize_into(stream, &proof, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |         serialize_into(stream, &encrypted_solution, Infinite);
[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] 276 |         let _ = serialize_into(stream, &encrypted_solution, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |         serialize_into(stream, &h_of_key, Infinite);
[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] 277 |         let _ = serialize_into(stream, &h_of_key, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 288 |         serialize_into(stream, &solving_pubkey, Infinite);
[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] 288 |         let _ = serialize_into(stream, &solving_pubkey, Infinite);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:317:17
[INFO] [stdout]     |
[INFO] [stdout] 317 |                 tx.send(());
[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] 317 |                 let _ = tx.send(());
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/sudoku.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         grid.solve(&mut rng);
[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] 88 |         let _ = grid.solve(&mut rng);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `Keypair`, which is not FFI-safe
[INFO] [stdout]   --> src/ffi.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |         -> *const Keypair;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/ffi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Keypair;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `Keypair`, which is not FFI-safe
[INFO] [stdout]   --> src/ffi.rs:25:27
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn gen_proof(keypair: *const Keypair, h: *mut c_void,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/ffi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Keypair;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `Keypair`, which is not FFI-safe
[INFO] [stdout]   --> src/ffi.rs:30:30
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn snark_verify(keypair: *const Keypair,
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a member to this struct
[INFO] [stdout]    = note: this struct has no fields
[INFO] [stdout] note: the type is defined here
[INFO] [stdout]   --> src/ffi.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Keypair;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/util.rs:64:17
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 decoder.finish();
[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] 64 |                 let _ = decoder.finish();
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.32s
[INFO] running `Command { std: "docker" "inspect" "e7bb264b235bda0deb690f0530f313f15e32e97d38c998dcdba22f28bf05cd99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7bb264b235bda0deb690f0530f313f15e32e97d38c998dcdba22f28bf05cd99", kill_on_drop: false }`
[INFO] [stdout] e7bb264b235bda0deb690f0530f313f15e32e97d38c998dcdba22f28bf05cd99
