[INFO] fetching crate llrb 0.0.1...
[INFO] checking llrb-0.0.1 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate llrb 0.0.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate llrb 0.0.1 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9d0db1f4b5f9bbeac61961d00d6618268ec8eabaf2b2b285016f0f89d24231f7
[INFO] running `"docker" "start" "-a" "9d0db1f4b5f9bbeac61961d00d6618268ec8eabaf2b2b285016f0f89d24231f7"`
[INFO] [stderr]     Checking llrb v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `right_is_red`
[INFO] [stderr]    --> src/lib.rs:288:13
[INFO] [stderr]     |
[INFO] [stderr] 288 |         let right_is_red = is_red(&self.left);
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_right_is_red`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]    --> src/lib.rs:289:43
[INFO] [stderr]     |
[INFO] [stderr] 289 |         if let Some((ref mut key, ref mut val)) = self.kv {
[INFO] [stderr]     |                                           ^^^ help: consider prefixing with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]    --> src/lib.rs:335:30
[INFO] [stderr]     |
[INFO] [stderr] 335 |     pub fn append(&mut self, other: &mut Self) {}
[INFO] [stderr]     |                              ^^^^^ help: consider prefixing with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `move_red_right`
[INFO] [stderr]   --> src/lib.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn move_red_right(&mut self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `move_red_left`
[INFO] [stderr]   --> src/lib.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn move_red_left(&mut self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `min`
[INFO] [stderr]    --> src/lib.rs:303:5
[INFO] [stderr]     |
[INFO] [stderr] 303 |     fn min(&self) -> &LLRB<K, V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right_is_red`
[INFO] [stderr]    --> src/lib.rs:288:13
[INFO] [stderr]     |
[INFO] [stderr] 288 |         let right_is_red = is_red(&self.left);
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_right_is_red`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]    --> src/lib.rs:289:43
[INFO] [stderr]     |
[INFO] [stderr] 289 |         if let Some((ref mut key, ref mut val)) = self.kv {
[INFO] [stderr]     |                                           ^^^ help: consider prefixing with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]    --> src/lib.rs:335:30
[INFO] [stderr]     |
[INFO] [stderr] 335 |     pub fn append(&mut self, other: &mut Self) {}
[INFO] [stderr]     |                              ^^^^^ help: consider prefixing with an underscore: `_other`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `move_red_right`
[INFO] [stderr]   --> src/lib.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn move_red_right(&mut self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `move_red_left`
[INFO] [stderr]   --> src/lib.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn move_red_left(&mut self) {}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `min`
[INFO] [stderr]    --> src/lib.rs:303:5
[INFO] [stderr]     |
[INFO] [stderr] 303 |     fn min(&self) -> &LLRB<K, V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "9d0db1f4b5f9bbeac61961d00d6618268ec8eabaf2b2b285016f0f89d24231f7"`
[INFO] running `"docker" "rm" "-f" "9d0db1f4b5f9bbeac61961d00d6618268ec8eabaf2b2b285016f0f89d24231f7"`
[INFO] [stdout] 9d0db1f4b5f9bbeac61961d00d6618268ec8eabaf2b2b285016f0f89d24231f7