[INFO] cloning repository https://github.com/hsanzg/exact-covers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hsanzg/exact-covers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsanzg%2Fexact-covers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsanzg%2Fexact-covers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 006bbcea1063c9d8c39e77ccba08aaa8cc94d222
[INFO] checking hsanzg/exact-covers against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsanzg%2Fexact-covers" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hsanzg/exact-covers on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hsanzg/exact-covers
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/hsanzg/exact-covers
[INFO] tweaked toml for git repo https://github.com/hsanzg/exact-covers written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hsanzg/exact-covers 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallvec v2.0.0-alpha.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8dff9ec6c7dc8dcec3ca7511ce25f40eeaf3b9c9323411fe857b0eb8aad5af0a
[INFO] running `Command { std: "docker" "start" "-a" "8dff9ec6c7dc8dcec3ca7511ce25f40eeaf3b9c9323411fe857b0eb8aad5af0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8dff9ec6c7dc8dcec3ca7511ce25f40eeaf3b9c9323411fe857b0eb8aad5af0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dff9ec6c7dc8dcec3ca7511ce25f40eeaf3b9c9323411fe857b0eb8aad5af0a", kill_on_drop: false }`
[INFO] [stdout] 8dff9ec6c7dc8dcec3ca7511ce25f40eeaf3b9c9323411fe857b0eb8aad5af0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a35db7f8b4fdd7bbdbfe17df693adf6444347ebe1477a678bfa2c8b7729ad954
[INFO] running `Command { std: "docker" "start" "-a" "a35db7f8b4fdd7bbdbfe17df693adf6444347ebe1477a678bfa2c8b7729ad954", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v2.0.0-alpha.6
[INFO] [stderr]     Checking exact-covers v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:14:30
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:18:48
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visit`
[INFO] [stdout]   --> src/dc.rs:26:23
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn solve<F>(self, visit: F)
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_visit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/dc.rs:35:23
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn pointer(&self, level: usize) -> Option<InstIndex> {
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]   --> src/dc.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                         ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/dc.rs:43:40
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:14:30
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:18:48
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visit`
[INFO] [stdout]   --> src/dc.rs:26:23
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn solve<F>(self, visit: F)
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_visit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/dc.rs:35:23
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn pointer(&self, level: usize) -> Option<InstIndex> {
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]   --> src/dc.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                         ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/dc.rs:43:40
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "a35db7f8b4fdd7bbdbfe17df693adf6444347ebe1477a678bfa2c8b7729ad954", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a35db7f8b4fdd7bbdbfe17df693adf6444347ebe1477a678bfa2c8b7729ad954", kill_on_drop: false }`
[INFO] [stdout] a35db7f8b4fdd7bbdbfe17df693adf6444347ebe1477a678bfa2c8b7729ad954
[INFO] checking hsanzg/exact-covers against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsanzg%2Fexact-covers" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hsanzg/exact-covers on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hsanzg/exact-covers
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/hsanzg/exact-covers
[INFO] tweaked toml for git repo https://github.com/hsanzg/exact-covers written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hsanzg/exact-covers 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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 244759ec7910788b128e390ffa65d9898405f6624b19a8c1bab260eac4885462
[INFO] running `Command { std: "docker" "start" "-a" "244759ec7910788b128e390ffa65d9898405f6624b19a8c1bab260eac4885462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "244759ec7910788b128e390ffa65d9898405f6624b19a8c1bab260eac4885462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "244759ec7910788b128e390ffa65d9898405f6624b19a8c1bab260eac4885462", kill_on_drop: false }`
[INFO] [stdout] 244759ec7910788b128e390ffa65d9898405f6624b19a8c1bab260eac4885462
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f2caff0311e8e45e9af92a28032bd3d794ea1e7acb1c3aa7ca641a90367e7c6
[INFO] running `Command { std: "docker" "start" "-a" "3f2caff0311e8e45e9af92a28032bd3d794ea1e7acb1c3aa7ca641a90367e7c6", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v2.0.0-alpha.6
[INFO] [stderr]     Checking exact-covers v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:14:30
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:18:48
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visit`
[INFO] [stdout]   --> src/dc.rs:26:23
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn solve<F>(self, visit: F)
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_visit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/dc.rs:35:23
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn pointer(&self, level: usize) -> Option<InstIndex> {
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]   --> src/dc.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                         ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/dc.rs:43:40
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:14:30
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(primary: &'i [I], secondary: &'i [I]) -> Self {
[INFO] [stdout]    |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:18:36
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_primary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:18:48
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_option<P, S>(&mut self, primary: P, secondary: S)
[INFO] [stdout]    |                                                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secondary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `visit`
[INFO] [stdout]   --> src/dc.rs:26:23
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn solve<F>(self, visit: F)
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_visit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/dc.rs:35:23
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn pointer(&self, level: usize) -> Option<InstIndex> {
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]   --> src/dc.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                         ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/dc.rs:43:40
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<&'i I>) {
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "3f2caff0311e8e45e9af92a28032bd3d794ea1e7acb1c3aa7ca641a90367e7c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f2caff0311e8e45e9af92a28032bd3d794ea1e7acb1c3aa7ca641a90367e7c6", kill_on_drop: false }`
[INFO] [stdout] 3f2caff0311e8e45e9af92a28032bd3d794ea1e7acb1c3aa7ca641a90367e7c6