[INFO] cloning repository https://github.com/mingerfan/dacinglink_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mingerfan/dacinglink_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingerfan%2Fdacinglink_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingerfan%2Fdacinglink_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e27025bbf000ddae199057e9fc560ac3d0228997
[INFO] fixing mingerfan/dacinglink_rs against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=end=2015,2024 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmingerfan%2Fdacinglink_rs" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mingerfan/dacinglink_rs
[INFO] finished tweaking git repo https://github.com/mingerfan/dacinglink_rs
[INFO] tweaked toml for git repo https://github.com/mingerfan/dacinglink_rs written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mingerfan/dacinglink_rs on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mingerfan/dacinglink_rs 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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f
[INFO] running `Command { std: "docker" "start" "5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=end=2015,2024", kill_on_drop: false }`
[INFO] [stderr] crater-edition-check: migrating to next edition
[INFO] [stderr]    Migrating Cargo.toml from 2021 edition to 2024
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling scratch v1.0.7
[INFO] [stderr]    Compiling rustix v0.38.34
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]    Compiling cxxbridge-flags v1.0.129
[INFO] [stderr]    Compiling serde_json v1.0.118
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]    Compiling cc v1.1.31
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
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[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]     Checking rand_core v0.6.4
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[INFO] [stderr]    Compiling cxx v1.0.129
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[INFO] [stderr]    Compiling cxx-build v1.0.129
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]    Compiling cxxbridge-macro v1.0.129
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]    Compiling dancinglink v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Migrating build.rs from 2021 edition to 2024
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]    Migrating src/lib.rs from 2021 edition to 2024
[INFO] [stderr] error: errors present after applying fixes to crate `dancinglink`
[INFO] [stderr]  --> src/cpp_binding.rs
[INFO] [stderr]   = cause: error: expected one of `!`, `+`, `::`, `;`, `where`, or `{`, found keyword `unsafe`
[INFO] [stderr]              --> src/cpp_binding.rs:14:46
[INFO] [stderr]               |
[INFO] [stderr]             9 |     unsafe extern "C++" {
[INFO] [stderr]               |                         - while parsing this item list starting here
[INFO] [stderr]            ...
[INFO] [stderr]            14 |         fn new_DLX() -> UniquePtr<DLXunsafe >unsafe ;
[INFO] [stderr]               |                                              ^^^^^^ expected one of `!`, `+`, `::`, `;`, `where`, or `{`
[INFO] [stderr]            ...
[INFO] [stderr]            22 |     }
[INFO] [stderr]               |     - the item list ends here
[INFO] [stderr]            
[INFO] [stderr]            
[INFO] [stderr]            error: expected `;`
[INFO] [stderr]              --> src/cpp_binding.rs:14:46
[INFO] [stderr]               |
[INFO] [stderr]            14 |         fn new_DLX() -> UniquePtr<DLXunsafe >unsafe ;
[INFO] [stderr]               |                                              ^^^^^^
[INFO] [stderr]            
[INFO] [stderr]            
[INFO] [stderr]            error[E0432]: unresolved import `ffi`
[INFO] [stderr]             --> src/cpp_binding.rs:3:9
[INFO] [stderr]              |
[INFO] [stderr]            3 | pub use ffi::*;
[INFO] [stderr]              |         ^^^
[INFO] [stderr]              |
[INFO] [stderr]            help: a similar path exists
[INFO] [stderr]              |
[INFO] [stderr]            3 | pub use std::ffi::*;
[INFO] [stderr]              |         +++++
[INFO] [stderr]            
[INFO] [stderr]            
[INFO] [stderr]            error: aborting due to 3 previous errors
[INFO] [stderr]            
[INFO] [stderr]            
[INFO] [stderr]            For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] help: to report this as a bug, open an issue at https://github.com/rust-lang/rust/issues, quoting the full output of this command
[INFO] [stderr] help: to possibly apply more fixes, pass in the `--broken-code` flag
[INFO] [stderr] note: original diagnostics will follow:
[INFO] [stderr]    Migrating benches/dancinglink_bench.rs from 2021 edition to 2024
[INFO] [stdout] warning: the `expr` fragment specifier will accept more expressions in the 2024 edition
[INFO] [stdout]    --> src/test_utils.rs:198:12
[INFO] [stdout]     |
[INFO] [stdout] 198 |     ($sel: expr, $($arg: tt)*) => {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/macro-fragment-specifiers.html>
[INFO] [stdout]     = note: `--force-warn edition-2024-expr-fragment-specifier` implied by `--force-warn rust-2024-compatibility`
[INFO] [stdout] help: to keep the existing behavior, use the `expr_2021` fragment specifier
[INFO] [stdout]     |
[INFO] [stdout] 198 |     ($sel: expr_2021, $($arg: tt)*) => {
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:14:39
[INFO] [stdout]    |
[INFO] [stdout] 14 |         fn new_DLX() -> UniquePtr<DLX>;
[INFO] [stdout]    |                                       ^
[INFO] [stdout]    |                                       |
[INFO] [stdout]    |                                       help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout]    = note: `--force-warn missing-unsafe-on-extern` implied by `--force-warn rust-2024-compatibility`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:15:57
[INFO] [stdout]    |
[INFO] [stdout] 15 |         fn init(self: Pin<&mut DLX>, row: i32, col: i32);
[INFO] [stdout]    |                                                         ^
[INFO] [stdout]    |                                                         |
[INFO] [stdout]    |                                                         help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:16:57
[INFO] [stdout]    |
[INFO] [stdout] 16 |         fn Link(self: Pin<&mut DLX>, row: i32, col: i32);
[INFO] [stdout]    |                                                         ^
[INFO] [stdout]    |                                                         |
[INFO] [stdout]    |                                                         help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:17:49
[INFO] [stdout]    |
[INFO] [stdout] 17 |         fn remove(self: Pin<&mut DLX>, col: i32);
[INFO] [stdout]    |                                                 ^
[INFO] [stdout]    |                                                 |
[INFO] [stdout]    |                                                 help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:18:49
[INFO] [stdout]    |
[INFO] [stdout] 18 |         fn resume(self: Pin<&mut DLX>, col: i32);
[INFO] [stdout]    |                                                 ^
[INFO] [stdout]    |                                                 |
[INFO] [stdout]    |                                                 help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:19:32
[INFO] [stdout]    |
[INFO] [stdout] 19 |         fn f(self: &DLX) -> i32;
[INFO] [stdout]    |                                ^
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:20:81
[INFO] [stdout]    |
[INFO] [stdout] 20 |         fn dance(self: Pin<&mut DLX>, deep: i32, path: Pin<&mut CxxVector<i32>>);
[INFO] [stdout]    |                                                                                 ^
[INFO] [stdout]    |                                                                                 |
[INFO] [stdout]    |                                                                                 help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:21:50
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fn get_res(self: &DLX) -> &CxxVector<i32>;
[INFO] [stdout]    |                                                  ^
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: extern blocks should be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:14:38
[INFO] [stdout]    |
[INFO] [stdout] 14 |         fn new_DLX() -> UniquePtr<DLX>;
[INFO] [stdout]    |                                      ^
[INFO] [stdout]    |                                      |
[INFO] [stdout]    |                                      help: needs `unsafe` before the extern keyword: `unsafe`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2021) but is a hard error in Rust 2024!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot explicitly dereference within an implicitly-borrowing pattern in Rust 2024
[INFO] [stdout]    --> src/dancinglink_multicover_v1.rs:256:30
[INFO] [stdout]     |
[INFO] [stdout] 256 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                              ^ reference pattern not allowed when implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout] note: matching on a reference type with a non-reference pattern implicitly borrows the contents
[INFO] [stdout]    --> src/dancinglink_multicover_v1.rs:256:26
[INFO] [stdout]     |
[INFO] [stdout] 256 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                          ^^^^^^^ this non-reference pattern matches on a reference type `&_`
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/match-ergonomics.html>
[INFO] [stdout]     = note: `--force-warn rust-2024-incompatible-pat` implied by `--force-warn rust-2024-compatibility`
[INFO] [stdout] help: match on the reference with a reference pattern to avoid implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout] 256 |                 .filter(|&(_, &x)| x != 0)
[INFO] [stdout]     |                          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot explicitly dereference within an implicitly-borrowing pattern in Rust 2024
[INFO] [stdout]    --> src/dancinglink_v1.rs:281:30
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                              ^ reference pattern not allowed when implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout] note: matching on a reference type with a non-reference pattern implicitly borrows the contents
[INFO] [stdout]    --> src/dancinglink_v1.rs:281:26
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                          ^^^^^^^ this non-reference pattern matches on a reference type `&_`
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/match-ergonomics.html>
[INFO] [stdout] help: match on the reference with a reference pattern to avoid implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 .filter(|&(_, &x)| x != 0)
[INFO] [stdout]     |                          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `if let` assigns a shorter lifetime since Edition 2024
[INFO] [stdout]    --> src/dancinglink_v1.rs:370:12
[INFO] [stdout]     |
[INFO] [stdout] 370 |         if let Ok(cases) = test_utils::load_failed_cases("failed_cases.txt") {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^-------------------------------------------------
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            this value has a significant drop implementation which may observe a major change in drop order and requires your discretion
[INFO] [stdout]     |
[INFO] [stdout]     = note: value may invoke a custom destructor because it contains a trait object
[INFO] [stdout] help: the value is now dropped here in Edition 2024
[INFO] [stdout]    --> src/dancinglink_v1.rs:387:9
[INFO] [stdout]     |
[INFO] [stdout] 387 |         } else {
[INFO] [stdout]     |         ^
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/temporary-if-let-scope.html>
[INFO] [stdout]     = note: `--force-warn if-let-rescope` implied by `--force-warn rust-2024-compatibility`
[INFO] [stdout] help: a `match` with a single arm can preserve the drop order up to Edition 2021
[INFO] [stdout]     |
[INFO] [stdout] 370 ~         match test_utils::load_failed_cases("failed_cases.txt") { Ok(cases) => {
[INFO] [stdout] 371 |             let mut test_res = vec![true; cases.len()];
[INFO] [stdout] ...
[INFO] [stdout] 386 |             assert!(test_res.iter().fold(true, |acc, x| acc & x), "Test Failed");
[INFO] [stdout] 387 ~         } _ => {
[INFO] [stdout] 388 |             println!("Failed to Load failed cases!");
[INFO] [stdout] 389 ~         }}
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed benches/bench_utils.rs (1 fix)
[INFO] [stderr]    Migrating benches/dancinglink_bench_multi.rs from 2021 edition to 2024
[INFO] [stderr]    Migrating benches/bench_utils.rs from 2021 edition to 2024
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 32.51s
[INFO] [stderr] crater-edition-check: dancinglink v0.1.0 (/opt/rustwide/workdir) updating edition from 2021 to 2024
[INFO] [stderr]    Compiling dancinglink v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:14:39
[INFO] [stdout]    |
[INFO] [stdout] 14 |         fn new_DLX() -> UniquePtr<DLX>;
[INFO] [stdout]    |                                       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:15:57
[INFO] [stdout]    |
[INFO] [stdout] 15 |         fn init(self: Pin<&mut DLX>, row: i32, col: i32);
[INFO] [stdout]    |                                                         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:16:57
[INFO] [stdout]    |
[INFO] [stdout] 16 |         fn Link(self: Pin<&mut DLX>, row: i32, col: i32);
[INFO] [stdout]    |                                                         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:17:49
[INFO] [stdout]    |
[INFO] [stdout] 17 |         fn remove(self: Pin<&mut DLX>, col: i32);
[INFO] [stdout]    |                                                 ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:18:49
[INFO] [stdout]    |
[INFO] [stdout] 18 |         fn resume(self: Pin<&mut DLX>, col: i32);
[INFO] [stdout]    |                                                 ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:19:32
[INFO] [stdout]    |
[INFO] [stdout] 19 |         fn f(self: &DLX) -> i32;
[INFO] [stdout]    |                                ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:20:81
[INFO] [stdout]    |
[INFO] [stdout] 20 |         fn dance(self: Pin<&mut DLX>, deep: i32, path: Pin<&mut CxxVector<i32>>);
[INFO] [stdout]    |                                                                                 ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:21:50
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fn get_res(self: &DLX) -> &CxxVector<i32>;
[INFO] [stdout]    |                                                  ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: extern blocks must be unsafe
[INFO] [stdout]   --> src/cpp_binding.rs:14:38
[INFO] [stdout]    |
[INFO] [stdout] 14 |         fn new_DLX() -> UniquePtr<DLX>;
[INFO] [stdout]    |                                      ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Matrix` is never constructed
[INFO] [stdout]   --> src/utils.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub struct Matrix(pub Vec<Vec<usize>>);
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot explicitly dereference within an implicitly-borrowing pattern
[INFO] [stdout]    --> src/dancinglink_multicover_v1.rs:256:30
[INFO] [stdout]     |
[INFO] [stdout] 256 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                              ^ reference pattern not allowed when implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/patterns.html#binding-modes>
[INFO] [stdout] note: matching on a reference type with a non-reference pattern implicitly borrows the contents
[INFO] [stdout]    --> src/dancinglink_multicover_v1.rs:256:26
[INFO] [stdout]     |
[INFO] [stdout] 256 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                          ^^^^^^^ this non-reference pattern matches on a reference type `&_`
[INFO] [stdout] help: match on the reference with a reference pattern to avoid implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout] 256 |                 .filter(|&(_, &x)| x != 0)
[INFO] [stdout]     |                          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot explicitly dereference within an implicitly-borrowing pattern
[INFO] [stdout]    --> src/dancinglink_v1.rs:281:30
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                              ^ reference pattern not allowed when implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/reference/patterns.html#binding-modes>
[INFO] [stdout] note: matching on a reference type with a non-reference pattern implicitly borrows the contents
[INFO] [stdout]    --> src/dancinglink_v1.rs:281:26
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 .filter(|(_, &x)| x != 0)
[INFO] [stdout]     |                          ^^^^^^^ this non-reference pattern matches on a reference type `&_`
[INFO] [stdout] help: match on the reference with a reference pattern to avoid implicitly borrowing
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 .filter(|&(_, &x)| x != 0)
[INFO] [stdout]     |                          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dancinglink` (lib test) due to 11 previous errors
[INFO] running `Command { std: "docker" "inspect" "5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f", kill_on_drop: false }`
[INFO] [stdout] 5cc6939f6e200ff62e3fef71e9c34724a451f68c0843464b03943877d15b2b2f
