[INFO] cloning repository https://github.com/tslilyai/rustyrb
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tslilyai/rustyrb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftslilyai%2Frustyrb"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftslilyai%2Frustyrb'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5310109fba877afa137980dad4715e076b1e1124
[INFO] checking tslilyai/rustyrb against try#1a399c10897767c36d147199696c96f193034e49 for pr-72644
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftslilyai%2Frustyrb" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tslilyai/rustyrb on toolchain 1a399c10897767c36d147199696c96f193034e49
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tslilyai/rustyrb
[INFO] finished tweaking git repo https://github.com/tslilyai/rustyrb
[INFO] tweaked toml for git repo https://github.com/tslilyai/rustyrb written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/tslilyai/rustyrb already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+1a399c10897767c36d147199696c96f193034e49" "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] 25f25d1b14aa7507f18be383bd484b24e5b7157a8c49202b02090a0b8dfd0d18
[INFO] running `"docker" "start" "-a" "25f25d1b14aa7507f18be383bd484b24e5b7157a8c49202b02090a0b8dfd0d18"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking rustyrbtree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: private type `rbtree::Node<K, V>` in public interface (error E0446)
[INFO] [stderr]    --> src/rbtree.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 | /     pub fn delete_helper(&self, hptr: &NodeptrT<K,V>, key: K) -> NodeptrT<K,V> { 
[INFO] [stderr] 165 | |         if let Some(mut h) = hptr.clone() {
[INFO] [stderr] 166 | |             if key < h.key  {
[INFO] [stderr] 167 | |                 if !RBTree::is_node_red(&h.left) && !RBTree::is_child_node_red(&h.left, 0) {
[INFO] [stderr] ...   |
[INFO] [stderr] 197 | |         return None;
[INFO] [stderr] 198 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(private_in_public)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: private type `rbtree::Node<K, V>` in public interface (error E0446)
[INFO] [stderr]    --> src/rbtree.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 | /     pub fn delete_helper(&self, hptr: &NodeptrT<K,V>, key: K) -> NodeptrT<K,V> { 
[INFO] [stderr] 165 | |         if let Some(mut h) = hptr.clone() {
[INFO] [stderr] 166 | |             if key < h.key  {
[INFO] [stderr] 167 | |                 if !RBTree::is_node_red(&h.left) && !RBTree::is_child_node_red(&h.left, 0) {
[INFO] [stderr] ...   |
[INFO] [stderr] 197 | |         return None;
[INFO] [stderr] 198 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `height`
[INFO] [stderr]    --> src/rbtree.rs:324:12
[INFO] [stderr]     |
[INFO] [stderr] 324 |     pub fn height(&self) -> isize {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `height_helper`
[INFO] [stderr]    --> src/rbtree.rs:327:8
[INFO] [stderr]     |
[INFO] [stderr] 327 |     fn height_helper(&self, xptr: &NodeptrT<K,V>) -> isize {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: private type `rbtree::Node<K, V>` in public interface (error E0446)
[INFO] [stderr]    --> src/rbtree.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 | /     pub fn delete_helper(&self, hptr: &NodeptrT<K,V>, key: K) -> NodeptrT<K,V> { 
[INFO] [stderr] 165 | |         if let Some(mut h) = hptr.clone() {
[INFO] [stderr] 166 | |             if key < h.key  {
[INFO] [stderr] 167 | |                 if !RBTree::is_node_red(&h.left) && !RBTree::is_child_node_red(&h.left, 0) {
[INFO] [stderr] ...   |
[INFO] [stderr] 197 | |         return None;
[INFO] [stderr] 198 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(private_in_public)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: private type `rbtree::Node<K, V>` in public interface (error E0446)
[INFO] [stderr]    --> src/rbtree.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 | /     pub fn delete_helper(&self, hptr: &NodeptrT<K,V>, key: K) -> NodeptrT<K,V> { 
[INFO] [stderr] 165 | |         if let Some(mut h) = hptr.clone() {
[INFO] [stderr] 166 | |             if key < h.key  {
[INFO] [stderr] 167 | |                 if !RBTree::is_node_red(&h.left) && !RBTree::is_child_node_red(&h.left, 0) {
[INFO] [stderr] ...   |
[INFO] [stderr] 197 | |         return None;
[INFO] [stderr] 198 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `height`
[INFO] [stderr]    --> src/rbtree.rs:324:12
[INFO] [stderr]     |
[INFO] [stderr] 324 |     pub fn height(&self) -> isize {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `height_helper`
[INFO] [stderr]    --> src/rbtree.rs:327:8
[INFO] [stderr]     |
[INFO] [stderr] 327 |     fn height_helper(&self, xptr: &NodeptrT<K,V>) -> isize {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `"docker" "inspect" "25f25d1b14aa7507f18be383bd484b24e5b7157a8c49202b02090a0b8dfd0d18"`
[INFO] running `"docker" "rm" "-f" "25f25d1b14aa7507f18be383bd484b24e5b7157a8c49202b02090a0b8dfd0d18"`
[INFO] [stdout] 25f25d1b14aa7507f18be383bd484b24e5b7157a8c49202b02090a0b8dfd0d18