[INFO] fetching crate exact-covers 0.3.0...
[INFO] checking exact-covers-0.3.0 against 895980e0290783bb09b1ccf1b11f14eb09b10430 for pr-160186
[INFO] extracting crate exact-covers 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate exact-covers 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate exact-covers 0.3.0
[INFO] tweaked toml for crates.io crate exact-covers 0.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate exact-covers 0.3.0 on toolchain 895980e0290783bb09b1ccf1b11f14eb09b10430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate exact-covers 0.3.0 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" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 | homepage = "https://github.com/hsanzg/exact-covers"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 | repository = "https://github.com/hsanzg/exact-covers"
[INFO] [stderr]    |              ----------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `exact-covers` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649
[INFO] running `Command { std: "docker" "start" "b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649", 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" "b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649", 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=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: `package.homepage` is redundant with `package.repository`
[INFO] [stderr]   --> Cargo.toml:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 | homepage = "https://github.com/hsanzg/exact-covers"
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 | repository = "https://github.com/hsanzg/exact-covers"
[INFO] [stderr]    |              ----------------------------------------
[INFO] [stderr]    |
[INFO] [stderr]    = note: `cargo::redundant_homepage` is set to `warn` by default
[INFO] [stderr] help: consider removing `package.homepage`
[INFO] [stderr] warning: `exact-covers` (manifest) generated 1 warning
[INFO] [stderr]     Checking smallvec v2.0.0-alpha.6
[INFO] [stderr]     Checking exact-covers v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:15:30
[INFO] [stdout]    |
[INFO] [stdout] 15 |     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:19:36
[INFO] [stdout]    |
[INFO] [stdout] 19 |     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:19:48
[INFO] [stdout]    |
[INFO] [stdout] 19 |     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:27:23
[INFO] [stdout]    |
[INFO] [stdout] 27 |     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:36:23
[INFO] [stdout]    |
[INFO] [stdout] 36 |     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:44:25
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<(&'i I, Option<C>)>) {
[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:44:40
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<(&'i I, Option<C>)>) {
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `primary`
[INFO] [stdout]   --> src/dc.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secondary`
[INFO] [stdout]   --> src/dc.rs:15:30
[INFO] [stdout]    |
[INFO] [stdout] 15 |     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:19:36
[INFO] [stdout]    |
[INFO] [stdout] 19 |     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:19:48
[INFO] [stdout]    |
[INFO] [stdout] 19 |     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:27:23
[INFO] [stdout]    |
[INFO] [stdout] 27 |     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:36:23
[INFO] [stdout]    |
[INFO] [stdout] 36 |     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:44:25
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<(&'i I, Option<C>)>) {
[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:44:40
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn option_of(&self, ix: InstIndex, result: &mut Vec<(&'i I, Option<C>)>) {
[INFO] [stdout]    |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649", kill_on_drop: false }`
[INFO] [stdout] b3c81595a95501d909182bc05ed2ad8f61715d93ae70f5973feb57e94cf0d649
