Dec 18 02:22:05.977 INFO checking cliffcrosland/search_index against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 02:22:05.977 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/cliffcrosland/search_index:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 02:22:06.425 INFO [stdout] cb1995df498b2cded4c63949b33d76584560755eb4f4f0b187cec07a61ce0fef
Dec 18 02:22:06.430 INFO running `"docker" "start" "-a" "cb1995df498b2cded4c63949b33d76584560755eb4f4f0b187cec07a61ce0fef"`
Dec 18 02:22:08.143 INFO [stderr]     Checking search_index v0.1.0 (/opt/crater/workdir)
Dec 18 02:22:09.044 INFO [stderr] warning: field is never used: `next_free`
Dec 18 02:22:09.044 INFO [stderr]   --> src/generational_arena.rs:16:5
Dec 18 02:22:09.044 INFO [stderr]    |
Dec 18 02:22:09.044 INFO [stderr] 16 |     next_free: Option<usize>,
Dec 18 02:22:09.045 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr]    |
Dec 18 02:22:09.045 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: field is never used: `len`
Dec 18 02:22:09.045 INFO [stderr]   --> src/generational_arena.rs:19:5
Dec 18 02:22:09.045 INFO [stderr]    |
Dec 18 02:22:09.045 INFO [stderr] 19 |     len: usize,
Dec 18 02:22:09.045 INFO [stderr]    |     ^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: struct is never constructed: `Slot`
Dec 18 02:22:09.045 INFO [stderr]   --> src/generational_arena.rs:34:1
Dec 18 02:22:09.045 INFO [stderr]    |
Dec 18 02:22:09.045 INFO [stderr] 34 | struct Slot<T> {
Dec 18 02:22:09.045 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: method is never used: `new`
Dec 18 02:22:09.045 INFO [stderr]   --> src/generational_arena.rs:41:5
Dec 18 02:22:09.045 INFO [stderr]    |
Dec 18 02:22:09.045 INFO [stderr] 41 |     pub fn new() -> GenerationalArena<T> {
Dec 18 02:22:09.045 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: method is never used: `insert`
Dec 18 02:22:09.045 INFO [stderr]   --> src/generational_arena.rs:50:5
Dec 18 02:22:09.045 INFO [stderr]    |
Dec 18 02:22:09.045 INFO [stderr] 50 |     pub fn insert(&mut self, value: T) -> GenerationalId {
Dec 18 02:22:09.045 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: method is never used: `get_mut`
Dec 18 02:22:09.045 INFO [stderr]   --> src/generational_arena.rs:91:5
Dec 18 02:22:09.045 INFO [stderr]    |
Dec 18 02:22:09.045 INFO [stderr] 91 |     pub fn get_mut(&mut self, id: &GenerationalId) -> Option<&mut T> {
Dec 18 02:22:09.045 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: method is never used: `remove`
Dec 18 02:22:09.045 INFO [stderr]    --> src/generational_arena.rs:103:5
Dec 18 02:22:09.045 INFO [stderr]     |
Dec 18 02:22:09.045 INFO [stderr] 103 |     pub fn remove(&mut self, id: &GenerationalId) -> bool {
Dec 18 02:22:09.045 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: method is never used: `len`
Dec 18 02:22:09.045 INFO [stderr]    --> src/generational_arena.rs:121:5
Dec 18 02:22:09.045 INFO [stderr]     |
Dec 18 02:22:09.045 INFO [stderr] 121 |     pub fn len(&self) -> usize { self.len }
Dec 18 02:22:09.045 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: method is never used: `capacity`
Dec 18 02:22:09.045 INFO [stderr]    --> src/generational_arena.rs:124:5
Dec 18 02:22:09.045 INFO [stderr]     |
Dec 18 02:22:09.045 INFO [stderr] 124 |     pub fn capacity(&self) -> usize { self.arena.len() }
Dec 18 02:22:09.045 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.045 INFO [stderr] 
Dec 18 02:22:09.045 INFO [stderr] warning: field is never used: `value`
Dec 18 02:22:09.045 INFO [stderr]   --> src/skip_list.rs:30:5
Dec 18 02:22:09.045 INFO [stderr]    |
Dec 18 02:22:09.045 INFO [stderr] 30 |     value: V,
Dec 18 02:22:09.045 INFO [stderr]    |     ^^^^^^^^
Dec 18 02:22:09.047 INFO [stderr] 
Dec 18 02:22:09.047 INFO [stderr] warning: struct is never constructed: `SkipListIterator`
Dec 18 02:22:09.047 INFO [stderr]   --> src/skip_list.rs:34:1
Dec 18 02:22:09.047 INFO [stderr]    |
Dec 18 02:22:09.047 INFO [stderr] 34 | pub struct SkipListIterator<'a, K: 'a, V: 'a> where K: Key {
Dec 18 02:22:09.048 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.048 INFO [stderr] 
Dec 18 02:22:09.048 INFO [stderr] warning: struct is never constructed: `SkipListPrefixIterator`
Dec 18 02:22:09.048 INFO [stderr]   --> src/skip_list.rs:41:1
Dec 18 02:22:09.048 INFO [stderr]    |
Dec 18 02:22:09.048 INFO [stderr] 41 | pub struct SkipListPrefixIterator<'a, K: 'a, V: 'a> where K: Key {
Dec 18 02:22:09.048 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.048 INFO [stderr] 
Dec 18 02:22:09.048 INFO [stderr] warning: struct is never constructed: `Node`
Dec 18 02:22:09.048 INFO [stderr]   --> src/skip_list.rs:92:1
Dec 18 02:22:09.048 INFO [stderr]    |
Dec 18 02:22:09.048 INFO [stderr] 92 | struct Node<K, V> where K: Key {
Dec 18 02:22:09.048 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.048 INFO [stderr] 
Dec 18 02:22:09.048 INFO [stderr] warning: type alias is never used: `NodeId`
Dec 18 02:22:09.048 INFO [stderr]   --> src/skip_list.rs:97:1
Dec 18 02:22:09.048 INFO [stderr]    |
Dec 18 02:22:09.048 INFO [stderr] 97 | type NodeId = GenerationalId;
Dec 18 02:22:09.048 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.048 INFO [stderr] 
Dec 18 02:22:09.048 INFO [stderr] warning: struct is never constructed: `SearchParams`
Dec 18 02:22:09.048 INFO [stderr]    --> src/skip_list.rs:101:1
Dec 18 02:22:09.048 INFO [stderr]     |
Dec 18 02:22:09.048 INFO [stderr] 101 | struct SearchParams<'a, K: 'a> where K: Key {
Dec 18 02:22:09.048 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.048 INFO [stderr] 
Dec 18 02:22:09.048 INFO [stderr] warning: method is never used: `new`
Dec 18 02:22:09.048 INFO [stderr]    --> src/skip_list.rs:113:5
Dec 18 02:22:09.048 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 113 |     pub fn new(target: &'a K) -> SearchParams<'a, K> {
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `record_traversal`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:121:5
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 121 |     pub fn record_traversal(mut self) -> SearchParams<'a, K> {
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `use_prefix_match`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:126:5
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 126 |     pub fn use_prefix_match(mut self) -> SearchParams<'a, K> {
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: struct is never constructed: `SearchResult`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:135:1
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 135 | struct SearchResult {
Dec 18 02:22:09.049 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `new`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:153:5
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 153 |     pub fn new() -> SkipList<K, V> {
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `len`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:163:5
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 163 |     pub fn len(&self) -> usize { 
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `set`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:169:5
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 169 |     pub fn set(&mut self, key: &K, value: V) {
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `get`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:224:5
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 224 |     pub fn get(&self, key: &K) -> Option<&V> {
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `get_mut`
Dec 18 02:22:09.049 INFO [stderr]    --> src/skip_list.rs:237:5
Dec 18 02:22:09.049 INFO [stderr]     |
Dec 18 02:22:09.049 INFO [stderr] 237 |     pub fn get_mut(&mut self, key: &K) -> Option<&mut V> {
Dec 18 02:22:09.049 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.049 INFO [stderr] 
Dec 18 02:22:09.049 INFO [stderr] warning: method is never used: `remove`
Dec 18 02:22:09.050 INFO [stderr]    --> src/skip_list.rs:251:5
Dec 18 02:22:09.050 INFO [stderr]     |
Dec 18 02:22:09.050 INFO [stderr] 251 |     pub fn remove(&mut self, key: &K) -> bool {
Dec 18 02:22:09.050 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.050 INFO [stderr] 
Dec 18 02:22:09.050 INFO [stderr] warning: method is never used: `iter`
Dec 18 02:22:09.050 INFO [stderr]    --> src/skip_list.rs:281:5
Dec 18 02:22:09.050 INFO [stderr]     |
Dec 18 02:22:09.050 INFO [stderr] 281 |     pub fn iter(&self) -> SkipListIterator<K, V> {
Dec 18 02:22:09.050 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.050 INFO [stderr] 
Dec 18 02:22:09.050 INFO [stderr] warning: method is never used: `iter_at`
Dec 18 02:22:09.050 INFO [stderr]    --> src/skip_list.rs:287:5
Dec 18 02:22:09.050 INFO [stderr]     |
Dec 18 02:22:09.050 INFO [stderr] 287 |     pub fn iter_at(&self, key: &K) -> SkipListIterator<K, V> {
Dec 18 02:22:09.050 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.050 INFO [stderr] 
Dec 18 02:22:09.050 INFO [stderr] warning: method is never used: `prefix_iter_at`
Dec 18 02:22:09.050 INFO [stderr]    --> src/skip_list.rs:297:5
Dec 18 02:22:09.050 INFO [stderr]     |
Dec 18 02:22:09.050 INFO [stderr] 297 |     pub fn prefix_iter_at(&self, prefix: &K) -> SkipListPrefixIterator<K, V> {
Dec 18 02:22:09.050 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.050 INFO [stderr] 
Dec 18 02:22:09.050 INFO [stderr] warning: method is never used: `iterator`
Dec 18 02:22:09.050 INFO [stderr]    --> src/skip_list.rs:324:5
Dec 18 02:22:09.050 INFO [stderr]     |
Dec 18 02:22:09.050 INFO [stderr] 324 |     fn iterator(&self, cur: Option<NodeId>) -> SkipListIterator<K, V> {
Dec 18 02:22:09.050 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.050 INFO [stderr] 
Dec 18 02:22:09.050 INFO [stderr] warning: method is never used: `prefix_iterator`
Dec 18 02:22:09.050 INFO [stderr]    --> src/skip_list.rs:331:5
Dec 18 02:22:09.050 INFO [stderr]     |
Dec 18 02:22:09.050 INFO [stderr] 331 |     fn prefix_iterator(&self, prefix: K, cur: Option<NodeId>) -> SkipListPrefixIterator<K, V> {
Dec 18 02:22:09.050 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.050 INFO [stderr] 
Dec 18 02:22:09.050 INFO [stderr] warning: method is never used: `search`
Dec 18 02:22:09.050 INFO [stderr]    --> src/skip_list.rs:339:5
Dec 18 02:22:09.050 INFO [stderr]     |
Dec 18 02:22:09.050 INFO [stderr] 339 |     fn search(&self, params: &SearchParams<K>) -> SearchResult {
Dec 18 02:22:09.050 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 02:22:09.050 INFO [stderr] 
Dec 18 02:22:09.300 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
Dec 18 02:22:10.402 INFO running `"docker" "inspect" "cb1995df498b2cded4c63949b33d76584560755eb4f4f0b187cec07a61ce0fef"`
Dec 18 02:22:10.772 INFO running `"docker" "rm" "-f" "cb1995df498b2cded4c63949b33d76584560755eb4f4f0b187cec07a61ce0fef"`
Dec 18 02:22:11.080 INFO [stdout] cb1995df498b2cded4c63949b33d76584560755eb4f4f0b187cec07a61ce0fef