[INFO] cloning repository https://github.com/Vawheter/SimpleZKCP
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Vawheter/SimpleZKCP" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVawheter%2FSimpleZKCP", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVawheter%2FSimpleZKCP'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 96aa4a1c2b0e1e7d432510a48ef6f6a635b70463
[INFO] testing Vawheter/SimpleZKCP against 1.69.0 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVawheter%2FSimpleZKCP" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Vawheter/SimpleZKCP on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Vawheter/SimpleZKCP
[INFO] finished tweaking git repo https://github.com/Vawheter/SimpleZKCP
[INFO] tweaked toml for git repo https://github.com/Vawheter/SimpleZKCP written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Vawheter/SimpleZKCP 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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded miniz-sys v0.1.7
[INFO] [stderr]   Downloaded encoding v0.2.32
[INFO] [stderr]   Downloaded gcc v0.3.21
[INFO] [stderr]   Downloaded bincode v0.4.0
[INFO] [stderr]   Downloaded serde v0.6.6
[INFO] [stderr]   Downloaded rand v0.3.12
[INFO] [stderr]   Downloaded thread-scoped v1.0.1
[INFO] [stderr]   Downloaded rust-crypto v0.2.34
[INFO] [stderr]   Downloaded fixedbitset v0.1.0
[INFO] [stderr]   Downloaded num v0.1.28
[INFO] [stderr]   Downloaded flate2 v0.2.11
[INFO] [stderr]   Downloaded whiteread v0.2.0
[INFO] [stderr]   Downloaded bzip2 v0.2.3
[INFO] [stderr]   Downloaded hex v0.1.0
[INFO] [stderr]   Downloaded strason v0.3.3
[INFO] [stderr]   Downloaded bzip2-sys v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5dd8d18bd2c82ea9eadca8aba5ade05a224cf5fc721a96efe2b9cd47574d0de2
[INFO] running `Command { std: "docker" "start" "-a" "5dd8d18bd2c82ea9eadca8aba5ade05a224cf5fc721a96efe2b9cd47574d0de2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5dd8d18bd2c82ea9eadca8aba5ade05a224cf5fc721a96efe2b9cd47574d0de2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dd8d18bd2c82ea9eadca8aba5ade05a224cf5fc721a96efe2b9cd47574d0de2", kill_on_drop: false }`
[INFO] [stdout] 5dd8d18bd2c82ea9eadca8aba5ade05a224cf5fc721a96efe2b9cd47574d0de2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 448e93c70b816098b2176b02c15c8562fe64a024537deb55796a1a9b710a26eb
[INFO] running `Command { std: "docker" "start" "-a" "448e93c70b816098b2176b02c15c8562fe64a024537deb55796a1a9b710a26eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling gcc v0.3.21
[INFO] [stderr]    Compiling winapi v0.2.5
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling libc v0.1.12
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling hex v0.1.0
[INFO] [stderr]    Compiling whiteread v0.2.0
[INFO] [stderr]    Compiling fixedbitset v0.1.0
[INFO] [stderr]    Compiling thread-scoped v1.0.1
[INFO] [stderr]    Compiling encoding-index-japanese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-korean v1.20141219.5
[INFO] [stderr]    Compiling advapi32-sys v0.1.2
[INFO] [stderr]    Compiling kernel32-sys v0.2.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling encoding v0.2.32
[INFO] [stderr]    Compiling miniz-sys v0.1.7
[INFO] [stderr]    Compiling bzip2-sys v0.1.3
[INFO] [stderr]    Compiling rust-crypto v0.2.34
[INFO] [stderr]    Compiling rand v0.3.12
[INFO] [stderr]    Compiling time v0.1.34
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling flate2 v0.2.11
[INFO] [stderr]    Compiling bzip2 v0.2.3
[INFO] [stderr]    Compiling num v0.1.28
[INFO] [stderr]    Compiling serde v0.6.6
[INFO] [stderr]    Compiling strason v0.3.3
[INFO] [stderr]    Compiling bincode v0.4.0
[INFO] [stderr]    Compiling pay-to-sudoku v0.0.1 (/opt/rustwide/workdir)
[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]   = note: `#[warn(deprecated)]` on by default
[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:46:59
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern "C" fn handle_proof_callback(cb: *mut c_void, len: uint32_t, encrypted_solution: *const uint8_t, proof: *const c_char, proof_len: ...
[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:46:96
[INFO] [stdout]    |
[INFO] [stdout] 46 | extern "C" fn handle_proof_callback(cb: *mut c_void, len: uint32_t, encrypted_solution: *const uint8_t, proof: *const c_char, proof_len: ...
[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:46:138
[INFO] [stdout]    |
[INFO] [stdout] 46 | ...ted_solution: *const uint8_t, proof: *const c_char, proof_len: int32_t)//n
[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:143:78
[INFO] [stdout]     |
[INFO] [stdout] 143 |     unsafe { snark_verify(ctx.keypair, len as u32, &proof[0], proof.len() as int32_t, &h_of_key[0], &encrypted_solution[0]) }
[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:22:25
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn gen_keypair(len: uint32_t, h: *mut c_void, cb: extern fn(*mut c_void, *const c_char, size_t, *const c_char, size_t));//n
[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:28:23
[INFO] [stdout]    |
[INFO] [stdout] 28 |                  len: uint32_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:28:50
[INFO] [stdout]    |
[INFO] [stdout] 28 |                  len: uint32_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:29:30
[INFO] [stdout]    |
[INFO] [stdout] 29 |                  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:29:56
[INFO] [stdout]    |
[INFO] [stdout] 29 |                  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:30:28
[INFO] [stdout]    |
[INFO] [stdout] 30 |     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:30:48
[INFO] [stdout]    |
[INFO] [stdout] 30 |     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:30:69
[INFO] [stdout]    |
[INFO] [stdout] 30 |     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:32:26
[INFO] [stdout]    |
[INFO] [stdout] 32 |                     len: 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:33:35
[INFO] [stdout]    |
[INFO] [stdout] 33 |                     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:34:32
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     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:36:38
[INFO] [stdout]    |
[INFO] [stdout] 36 |                     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:37:42
[INFO] [stdout]    |
[INFO] [stdout] 37 |                     enc_solution: *const uint8_t
[INFO] [stdout]    |                                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ffi.rs:53:32
[INFO] [stdout]    |
[INFO] [stdout] 53 |         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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 |         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:65:32
[INFO] [stdout]    |
[INFO] [stdout] 65 |         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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 |         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:72:22
[INFO] [stdout]    |
[INFO] [stdout] 72 |     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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 72 |     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:99:22
[INFO] [stdout]    |
[INFO] [stdout] 99 |     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/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut cb: &mut dyn for<'a> FnMut(&'a [u8], &'a [u8]) = &mut f;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pay-to-sudoku` due to 2 previous errors; 29 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "448e93c70b816098b2176b02c15c8562fe64a024537deb55796a1a9b710a26eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "448e93c70b816098b2176b02c15c8562fe64a024537deb55796a1a9b710a26eb", kill_on_drop: false }`
[INFO] [stdout] 448e93c70b816098b2176b02c15c8562fe64a024537deb55796a1a9b710a26eb
