[INFO] cloning repository https://github.com/matteocam/pay-to-sudoku-attack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matteocam/pay-to-sudoku-attack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatteocam%2Fpay-to-sudoku-attack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatteocam%2Fpay-to-sudoku-attack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cfc072fcdc17e10916185308edbdd232be808ad4
[INFO] testing matteocam/pay-to-sudoku-attack against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatteocam%2Fpay-to-sudoku-attack" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matteocam/pay-to-sudoku-attack on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/matteocam/pay-to-sudoku-attack
[INFO] finished tweaking git repo https://github.com/matteocam/pay-to-sudoku-attack
[INFO] tweaked toml for git repo https://github.com/matteocam/pay-to-sudoku-attack written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/matteocam/pay-to-sudoku-attack already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded vec_map v0.4.0
[INFO] [stderr]   Downloaded fixedbitset v0.1.6
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[INFO] [stderr]   Downloaded jsonrpc v0.7.6
[INFO] [stderr]   Downloaded strason v0.3.4
[INFO] [stderr]   Downloaded bzip2 v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 386150519f25e7ea2507de06be329d8a67d2cdfd42d436d06a52e311767090ec
[INFO] running `Command { std: "docker" "start" "-a" "386150519f25e7ea2507de06be329d8a67d2cdfd42d436d06a52e311767090ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "386150519f25e7ea2507de06be329d8a67d2cdfd42d436d06a52e311767090ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "386150519f25e7ea2507de06be329d8a67d2cdfd42d436d06a52e311767090ec", kill_on_drop: false }`
[INFO] [stdout] 386150519f25e7ea2507de06be329d8a67d2cdfd42d436d06a52e311767090ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2757ea11da2bc1c02c346ac65d6fdf9b794b56cc947682140745fb964ca948c7
[INFO] running `Command { std: "docker" "start" "-a" "2757ea11da2bc1c02c346ac65d6fdf9b794b56cc947682140745fb964ca948c7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.21
[INFO] [stderr]    Compiling rustc-serialize v0.3.23
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling log v0.3.7
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[INFO] [stderr]    Compiling vec_map v0.4.0
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[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling whiteread v0.2.0
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[INFO] [stderr]    Compiling unicase v1.4.0
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20141219.5
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[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.5
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[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling num_cpus v0.2.13
[INFO] [stderr]    Compiling clap v1.5.6
[INFO] [stderr]    Compiling solicit v0.4.4
[INFO] [stderr]    Compiling bzip2-sys v0.1.5
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling encoding v0.2.33
[INFO] [stderr]    Compiling flate2 v0.2.19
[INFO] [stderr]    Compiling bzip2 v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.1.37
[INFO] [stderr]    Compiling num-complex v0.1.37
[INFO] [stderr]    Compiling uuid v0.1.18
[INFO] [stderr]    Compiling url v0.2.38
[INFO] [stderr]    Compiling num-rational v0.1.36
[INFO] [stderr]    Compiling cookie v0.1.21
[INFO] [stderr]    Compiling num v0.1.37
[INFO] [stderr]    Compiling serde v0.6.15
[INFO] [stderr]    Compiling mime v0.1.3
[INFO] [stderr]    Compiling strason v0.3.4
[INFO] [stderr]    Compiling bincode v0.4.1
[INFO] [stderr]    Compiling hyper v0.6.16
[INFO] [stderr]    Compiling jsonrpc v0.7.6
[INFO] [stderr]    Compiling pay-to-sudoku v0.0.1 (/opt/rustwide/workdir)
[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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:54:32
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let closure: &mut &mut for<'a> FnMut(&'a [u8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> FnMut(&'a [u8], &'a [i8])`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:66:32
[INFO] [stdout]    |
[INFO] [stdout] 66 |         let closure: &mut &mut for<'a> FnMut(&'a [i8], &'a [i8]) = mem::transmute(cb);
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> FnMut(&'a [i8], &'a [i8])`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:73:22
[INFO] [stdout]    |
[INFO] [stdout] 73 |     let mut cb: &mut for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> FnMut(&'a [u8], &'a [u8])`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:97:22
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let mut cb: &mut for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> FnMut(&'a [u8], &'a [u8])`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ffi.rs:111:22
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let mut cb: &mut for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn for<'a> FnMut(&'a [u8], &'a [u8])`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 |     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:198:28
[INFO] [stdout]     |
[INFO] [stdout] 198 |     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:199:41
[INFO] [stdout]     |
[INFO] [stdout] 199 |     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:201:33
[INFO] [stdout]     |
[INFO] [stdout] 201 |     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:214:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |         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:215:9
[INFO] [stdout]     |
[INFO] [stdout] 215 |         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:217:38
[INFO] [stdout]     |
[INFO] [stdout] 217 |         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:311:28
[INFO] [stdout]     |
[INFO] [stdout] 311 |                         if (rx.lock().unwrap().try_recv().is_ok()) {
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `encrypted_solution`
[INFO] [stdout]    --> src/main.rs:179:16
[INFO] [stdout]     |
[INFO] [stdout] 179 |               |encrypted_solution, proof| {}));
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_encrypted_solution`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `proof`
[INFO] [stdout]    --> src/main.rs:179:36
[INFO] [stdout]     |
[INFO] [stdout] 179 |               |encrypted_solution, proof| {}));
[INFO] [stdout]     |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_proof`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/main.rs:352:13
[INFO] [stdout]     |
[INFO] [stdout] 352 |     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:358:13
[INFO] [stdout]     |
[INFO] [stdout] 358 |     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: 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] 
[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: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:201:9
[INFO] [stdout]     |
[INFO] [stdout] 201 |     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]     = note: `#[warn(unused_mut)]` on by default
[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 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:325:13
[INFO] [stdout]     |
[INFO] [stdout] 325 |         let mut vout;
[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/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] 
[INFO] [stdout] warning: associated function is never used: `print`
[INFO] [stdout]    --> src/sudoku.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn print(&self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_sudoku_from_stdin`
[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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[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] 
[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, &proof, Infinite);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[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, &encrypted_solution, Infinite);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:278:9
[INFO] [stdout]     |
[INFO] [stdout] 278 |         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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |         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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:318:17
[INFO] [stdout]     |
[INFO] [stdout] 318 |                 tx.send(());
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[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] 
[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]    = note: `#[warn(improper_ctypes)]` on by default
[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: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:30:40
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn malicious_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: `extern` block uses type `Keypair`, which is not FFI-safe
[INFO] [stdout]   --> src/ffi.rs:38:40
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn prove_malicious_verify(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: 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] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.pay_to_sudoku.4525023e-cgu.9.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e.2bb5p0qpj99h2qh3.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/target/debug/build/bzip2-sys-7c02e7829284bebc/out" "-L" "/opt/rustwide/target/debug/build/miniz-sys-7c11e8901fa69dff/out" "-L" "/opt/rustwide/target/debug/build/rust-crypto-1386eebf20d7c4c9/out" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lmysnark" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libjsonrpc-81eca848cec0074b.rlib" "/opt/rustwide/target/debug/deps/libhyper-696e3619b449b6a7.rlib" "/opt/rustwide/target/debug/deps/libmime-f9c1b5aceb7e63e6.rlib" "/opt/rustwide/target/debug/deps/liblanguage_tags-25aa90182459eeca.rlib" "/opt/rustwide/target/debug/deps/libsolicit-19572d464052601d.rlib" "/opt/rustwide/target/debug/deps/libhpack-389c9d547801a66c.rlib" "/opt/rustwide/target/debug/deps/liblog-734d29f266ba9587.rlib" "/opt/rustwide/target/debug/deps/libtypeable-da81fb00b76e6621.rlib" "/opt/rustwide/target/debug/deps/libtraitobject-a3879ed9dc8ac2fd.rlib" "/opt/rustwide/target/debug/deps/libnum_cpus-7007d89d91f19be0.rlib" "/opt/rustwide/target/debug/deps/libhttparse-bbc7054d7238b08e.rlib" "/opt/rustwide/target/debug/deps/libunicase-5f220d9b1a976912.rlib" "/opt/rustwide/target/debug/deps/libcookie-365d9967d849b5d4.rlib" "/opt/rustwide/target/debug/deps/liburl-38d8c8062eea6f71.rlib" "/opt/rustwide/target/debug/deps/libmatches-a571863533338e1f.rlib" "/opt/rustwide/target/debug/deps/libuuid-f5951d7c871f4c82.rlib" "/opt/rustwide/target/debug/deps/libcrypto-f6da6a7f15ab6b9a.rlib" "/opt/rustwide/target/debug/deps/libtime-18e1402f21a05d7d.rlib" "/opt/rustwide/target/debug/deps/libstrason-88cc52de599cfa1c.rlib" "/opt/rustwide/target/debug/deps/libencoding-18b06638acc1fc7b.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_tradchinese-58174fec7b0bf5d7.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_simpchinese-debf02885cfeb32d.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_japanese-1eaf5817fcca4bf7.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_korean-76861523837f34cc.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_singlebyte-bba40c505fc64bc2.rlib" "/opt/rustwide/target/debug/deps/libflate2-9f8611a5f04a4955.rlib" "/opt/rustwide/target/debug/deps/libminiz_sys-1f567dba48e2c0fe.rlib" "/opt/rustwide/target/debug/deps/libclap-1a4c7340d9ad1d79.rlib" "/opt/rustwide/target/debug/deps/libvec_map-f2bf9063916553c8.rlib" "/opt/rustwide/target/debug/deps/libbitflags-e40927569ddda101.rlib" "/opt/rustwide/target/debug/deps/libansi_term-a8f00b6851fb3005.rlib" "/opt/rustwide/target/debug/deps/libstrsim-06a54bc207f6c67c.rlib" "/opt/rustwide/target/debug/deps/libhex-2d08eb6b4cfa2a66.rlib" "/opt/rustwide/target/debug/deps/libthread_scoped-07bf0605d6daa2af.rlib" "/opt/rustwide/target/debug/deps/libbincode-95ec4f0e555932d7.rlib" "/opt/rustwide/target/debug/deps/libserde-ad47e5600f4746ff.rlib" "/opt/rustwide/target/debug/deps/libnum-023ae5a793458f68.rlib" "/opt/rustwide/target/debug/deps/libnum_rational-2895dc038c6e92b8.rlib" "/opt/rustwide/target/debug/deps/libnum_bigint-ad99c611e5018f95.rlib" "/opt/rustwide/target/debug/deps/librand-3f034aaa978b010d.rlib" "/opt/rustwide/target/debug/deps/libnum_complex-ac971811ff0e121f.rlib" "/opt/rustwide/target/debug/deps/libnum_iter-42242febf64b8434.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-aa7b37fe7f746d1d.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-d8905577e076cc2a.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-b9e35a2a6a7ae24d.rlib" "/opt/rustwide/target/debug/deps/librustc_serialize-c2fea47394492d92.rlib" "/opt/rustwide/target/debug/deps/liblibc-3ae6f83da73b3ed6.rlib" "/opt/rustwide/target/debug/deps/libwhiteread-d39f1ae1dc16e64d.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-197d933f09d9a590.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-46a006cddfd334f0.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-5b9870310e470b38.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-260022ba8f1ab4ee.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-71377435a799394f.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-658ee5924fde57cd.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-9e8627da6bd1b94a.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-19fdaac49f59be84.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-cb00e2691ea45905.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-50f6726defae5ae1.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-2afc16311deea26e.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-bb5cb0fe086ee8cf.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-896053247b5dfd0b.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-735e1f2ac3cf23be.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-9dfb6622644c732c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-beea7d9617fe25c5.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-8ef7dd43fc671f88.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-a9a3b2ad67977f47.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2021-08-01-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-06b01a367dedb62e" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: cannot find -lmysnark
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 46 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pay-to-sudoku` due to 2 previous errors; 46 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "2757ea11da2bc1c02c346ac65d6fdf9b794b56cc947682140745fb964ca948c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2757ea11da2bc1c02c346ac65d6fdf9b794b56cc947682140745fb964ca948c7", kill_on_drop: false }`
[INFO] [stdout] 2757ea11da2bc1c02c346ac65d6fdf9b794b56cc947682140745fb964ca948c7
