[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-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatteocam%2Fpay-to-sudoku-attack" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matteocam/pay-to-sudoku-attack on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", 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-4/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-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded jsonrpc v0.7.6
[INFO] [stderr]   Downloaded num-complex v0.1.37
[INFO] [stderr]   Downloaded strsim v0.4.1
[INFO] [stderr]   Downloaded num-bigint v0.1.37
[INFO] [stderr]   Downloaded num-rational v0.1.36
[INFO] [stderr]   Downloaded hex v0.1.0
[INFO] [stderr]   Downloaded vec_map v0.4.0
[INFO] [stderr]   Downloaded bzip2 v0.2.4
[INFO] [stderr]   Downloaded clap v1.5.6
[INFO] [stderr]   Downloaded fixedbitset v0.1.6
[INFO] [stderr]   Downloaded whiteread v0.2.0
[INFO] [stderr]   Downloaded strason v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee1cc8d3bc7a9f27a14ffcadf8f7830fcfa5047be2aeb596993c0f24a52e5a7d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ee1cc8d3bc7a9f27a14ffcadf8f7830fcfa5047be2aeb596993c0f24a52e5a7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee1cc8d3bc7a9f27a14ffcadf8f7830fcfa5047be2aeb596993c0f24a52e5a7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee1cc8d3bc7a9f27a14ffcadf8f7830fcfa5047be2aeb596993c0f24a52e5a7d", kill_on_drop: false }`
[INFO] [stdout] ee1cc8d3bc7a9f27a14ffcadf8f7830fcfa5047be2aeb596993c0f24a52e5a7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 306e962c36c78371e61ae3817f9186ca36c198a4359b9a6cfaed82f5b65bd4a5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "306e962c36c78371e61ae3817f9186ca36c198a4359b9a6cfaed82f5b65bd4a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustc-serialize v0.3.23
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling matches v0.1.4
[INFO] [stderr]    Compiling language-tags v0.0.7
[INFO] [stderr]    Compiling traitobject v0.0.1
[INFO] [stderr]    Compiling httparse v1.2.2
[INFO] [stderr]    Compiling ansi_term v0.7.5
[INFO] [stderr]    Compiling vec_map v0.4.0
[INFO] [stderr]    Compiling byteorder v0.4.2
[INFO] [stderr]    Compiling strsim v0.4.1
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling thread-scoped v1.0.1
[INFO] [stderr]    Compiling hex v0.1.0
[INFO] [stderr]    Compiling fixedbitset v0.1.6
[INFO] [stderr]    Compiling whiteread v0.2.0
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling hpack v0.2.0
[INFO] [stderr]    Compiling bzip2-sys v0.1.5
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]    Compiling num_cpus v0.2.13
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling clap v1.5.6
[INFO] [stderr]    Compiling solicit v0.4.4
[INFO] [stderr]    Compiling unicase v1.4.0
[INFO] [stderr]    Compiling num-integer v0.1.34
[INFO] [stderr]    Compiling num-iter v0.1.33
[INFO] [stderr]    Compiling bzip2 v0.2.4
[INFO] [stderr]    Compiling flate2 v0.2.19
[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: 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: 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] 
[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] 
[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] 
[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] 
[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] 
[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: 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 `std::result::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 `std::result::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 `std::result::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 `std::result::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 `std::result::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 `std::result::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 `std::result::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 `std::result::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 `std::result::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 code: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-Wl,--eh-frame-hdr" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.10.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.11.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.12.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.13.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.14.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.15.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.pay_to_sudoku.3klez0wh-cgu.9.rcgu.o" "-o" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c" "/opt/rustwide/target/debug/deps/pay_to_sudoku-76cb59d10c06627c.3febypxsky8ztf5t.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/target/debug/build/bzip2-sys-f8792bfe420c62fe/out" "-L" "/opt/rustwide/target/debug/build/miniz-sys-5a35291f1ba118bd/out" "-L" "/opt/rustwide/target/debug/build/rust-crypto-caefd762dcd7b2cc/out" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lmysnark" "-Wl,-Bstatic" "/opt/rustwide/target/debug/deps/libjsonrpc-3275ddbbe4147c8f.rlib" "/opt/rustwide/target/debug/deps/libhyper-e66443de6c424bb5.rlib" "/opt/rustwide/target/debug/deps/libmime-bb4caf4073bc6366.rlib" "/opt/rustwide/target/debug/deps/liblanguage_tags-0f9305c7652a20dc.rlib" "/opt/rustwide/target/debug/deps/libsolicit-ce2ca7699d438d26.rlib" "/opt/rustwide/target/debug/deps/libhpack-94724525c9bd44bb.rlib" "/opt/rustwide/target/debug/deps/liblog-ccf3a3a49fba2d62.rlib" "/opt/rustwide/target/debug/deps/libtypeable-4fd57d22a0a5b0f3.rlib" "/opt/rustwide/target/debug/deps/libtraitobject-62e9801f41c7f04d.rlib" "/opt/rustwide/target/debug/deps/libnum_cpus-60526c7ab2eb6def.rlib" "/opt/rustwide/target/debug/deps/libhttparse-b5199353fb0173dd.rlib" "/opt/rustwide/target/debug/deps/libunicase-bd038efa839a6656.rlib" "/opt/rustwide/target/debug/deps/libcookie-56b927e212f576d2.rlib" "/opt/rustwide/target/debug/deps/liburl-9ddbf8f626058014.rlib" "/opt/rustwide/target/debug/deps/libmatches-c98a5fe2487978b9.rlib" "/opt/rustwide/target/debug/deps/libuuid-96450d27332e4e30.rlib" "/opt/rustwide/target/debug/deps/libcrypto-602466181a81f9e8.rlib" "/opt/rustwide/target/debug/deps/libtime-8cb65089cd050836.rlib" "/opt/rustwide/target/debug/deps/libstrason-a70a67bcc22f8962.rlib" "/opt/rustwide/target/debug/deps/libencoding-6ed8aa24ccb887c5.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_tradchinese-e1b390b523d7cfee.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_simpchinese-5b7b0264629b6ce3.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_japanese-e0701c516fc85402.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_korean-c78092f37518b15a.rlib" "/opt/rustwide/target/debug/deps/libencoding_index_singlebyte-3d19531277b86107.rlib" "/opt/rustwide/target/debug/deps/libflate2-1e11c64c04f47e9e.rlib" "/opt/rustwide/target/debug/deps/libminiz_sys-b35fff90f2f4dbd0.rlib" "/opt/rustwide/target/debug/deps/libclap-44f384bc8ce7c662.rlib" "/opt/rustwide/target/debug/deps/libvec_map-26dcc1d8e41ce80f.rlib" "/opt/rustwide/target/debug/deps/libbitflags-eb74283e97a07812.rlib" "/opt/rustwide/target/debug/deps/libansi_term-52d491440ce351c0.rlib" "/opt/rustwide/target/debug/deps/libstrsim-ee65ff91f79dac19.rlib" "/opt/rustwide/target/debug/deps/libhex-d262973486aa4a7b.rlib" "/opt/rustwide/target/debug/deps/libthread_scoped-d6ced805143c5f8c.rlib" "/opt/rustwide/target/debug/deps/libbincode-3c9f8ac028006317.rlib" "/opt/rustwide/target/debug/deps/libserde-48ba87aef30f6a3b.rlib" "/opt/rustwide/target/debug/deps/libnum-7dd74839c1fadc66.rlib" "/opt/rustwide/target/debug/deps/libnum_rational-5dd19c71006e97fe.rlib" "/opt/rustwide/target/debug/deps/libnum_bigint-063612fd62e6cc90.rlib" "/opt/rustwide/target/debug/deps/librand-3ac753be60a3f872.rlib" "/opt/rustwide/target/debug/deps/libnum_complex-fc18598a7a5153ec.rlib" "/opt/rustwide/target/debug/deps/libnum_iter-2607865ff5ce011d.rlib" "/opt/rustwide/target/debug/deps/libnum_integer-2a0604c8130a11ef.rlib" "/opt/rustwide/target/debug/deps/libnum_traits-b4989b3c6b7d9dff.rlib" "/opt/rustwide/target/debug/deps/libbyteorder-8629e3967fd30b90.rlib" "/opt/rustwide/target/debug/deps/librustc_serialize-fc7ba9965616a27e.rlib" "/opt/rustwide/target/debug/deps/liblibc-d411205fc5c7bd9b.rlib" "/opt/rustwide/target/debug/deps/libwhiteread-d4133192790500ff.rlib" "-Wl,--start-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-3532beb752f910d7.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-3529ece450b7f3c6.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-23e8f582a6744f80.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-5e7e0793b29cbf78.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-253e0736424ceb78.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-b6fd484888124c85.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-cca4d20e4b53839c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-0a7401891c2a4f50.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-efbb25e073df787e.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-25965457612624bc.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-09058283ea779342.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-ab973dacc0513511.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-b437d6640b1f764b.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-8cc0b2380206399c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-727cdf2b6a468113.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-cf4d442d877ea2f4.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2020-10-09-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-7e5b6df427ca977c.rlib" "-Wl,-Bdynamic" "-lutil" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil"
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "306e962c36c78371e61ae3817f9186ca36c198a4359b9a6cfaed82f5b65bd4a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "306e962c36c78371e61ae3817f9186ca36c198a4359b9a6cfaed82f5b65bd4a5", kill_on_drop: false }`
[INFO] [stdout] 306e962c36c78371e61ae3817f9186ca36c198a4359b9a6cfaed82f5b65bd4a5
