[INFO] fetching crate llrb 0.0.1...
[INFO] checking llrb-0.0.1 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate llrb 0.0.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate llrb 0.0.1 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate llrb 0.0.1
[INFO] finished tweaking crates.io crate llrb 0.0.1
[INFO] tweaked toml for crates.io crate llrb 0.0.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a44558ee76372baf63e796336ee52b47cea0c3756ed7561908899d80519f899b
[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" "a44558ee76372baf63e796336ee52b47cea0c3756ed7561908899d80519f899b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a44558ee76372baf63e796336ee52b47cea0c3756ed7561908899d80519f899b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a44558ee76372baf63e796336ee52b47cea0c3756ed7561908899d80519f899b", kill_on_drop: false }`
[INFO] [stdout] a44558ee76372baf63e796336ee52b47cea0c3756ed7561908899d80519f899b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 99cc98dbf4b3342eefbd391c893833527acde5192fe707e93c7369238297d077
[INFO] running `Command { std: "docker" "start" "-a" "99cc98dbf4b3342eefbd391c893833527acde5192fe707e93c7369238297d077", kill_on_drop: false }`
[INFO] [stderr]     Checking llrb v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `right_is_red`
[INFO] [stdout]    --> src/lib.rs:288:13
[INFO] [stdout]     |
[INFO] [stdout] 288 |         let right_is_red = is_red(&self.left);
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_is_red`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/lib.rs:289:35
[INFO] [stdout]     |
[INFO] [stdout] 289 |         if let Some((ref mut key, ref mut val)) = self.kv {
[INFO] [stdout]     |                                   ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> src/lib.rs:335:30
[INFO] [stdout]     |
[INFO] [stdout] 335 |     pub fn append(&mut self, other: &mut Self) {}
[INFO] [stdout]     |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_is_red`
[INFO] [stdout]    --> src/lib.rs:288:13
[INFO] [stdout]     |
[INFO] [stdout] 288 |         let right_is_red = is_red(&self.left);
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_is_red`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/lib.rs:289:35
[INFO] [stdout]     |
[INFO] [stdout] 289 |         if let Some((ref mut key, ref mut val)) = self.kv {
[INFO] [stdout]     |                                   ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> src/lib.rs:335:30
[INFO] [stdout]     |
[INFO] [stdout] 335 |     pub fn append(&mut self, other: &mut Self) {}
[INFO] [stdout]     |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_red_right`
[INFO] [stdout]   --> src/lib.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn move_red_right(&mut self) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_red_left`
[INFO] [stdout]   --> src/lib.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn move_red_left(&mut self) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `min`
[INFO] [stdout]    --> src/lib.rs:303:8
[INFO] [stdout]     |
[INFO] [stdout] 303 |     fn min(&self) -> &LLRB<K, V> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_red_right`
[INFO] [stdout]   --> src/lib.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn move_red_right(&mut self) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_red_left`
[INFO] [stdout]   --> src/lib.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn move_red_left(&mut self) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `min`
[INFO] [stdout]    --> src/lib.rs:303:8
[INFO] [stdout]     |
[INFO] [stdout] 303 |     fn min(&self) -> &LLRB<K, V> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "99cc98dbf4b3342eefbd391c893833527acde5192fe707e93c7369238297d077", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99cc98dbf4b3342eefbd391c893833527acde5192fe707e93c7369238297d077", kill_on_drop: false }`
[INFO] [stdout] 99cc98dbf4b3342eefbd391c893833527acde5192fe707e93c7369238297d077