[INFO] cloning repository https://github.com/zyx-db/kv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zyx-db/kv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzyx-db%2Fkv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzyx-db%2Fkv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 613ee49472e509a69752cc2ea032e9aebbe14722
[INFO] checking zyx-db/kv against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzyx-db%2Fkv" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zyx-db/kv on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zyx-db/kv
[INFO] finished tweaking git repo https://github.com/zyx-db/kv
[INFO] tweaked toml for git repo https://github.com/zyx-db/kv written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zyx-db/kv 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] adfb821f054dbd2a595201bbed733cb7f2c2eae18c03424fc69107735786835b
[INFO] running `Command { std: "docker" "start" "-a" "adfb821f054dbd2a595201bbed733cb7f2c2eae18c03424fc69107735786835b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "adfb821f054dbd2a595201bbed733cb7f2c2eae18c03424fc69107735786835b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adfb821f054dbd2a595201bbed733cb7f2c2eae18c03424fc69107735786835b", kill_on_drop: false }`
[INFO] [stdout] adfb821f054dbd2a595201bbed733cb7f2c2eae18c03424fc69107735786835b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63f8f6a3fac375dc14b503a7e2ad9ec74a4742143607a4181231c015189d09b9
[INFO] running `Command { std: "docker" "start" "-a" "63f8f6a3fac375dc14b503a7e2ad9ec74a4742143607a4181231c015189d09b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]     Checking chunked_transfer v1.5.0
[INFO] [stderr]     Checking ascii v1.1.0
[INFO] [stderr]     Checking tiny_http v0.12.0
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking db-kv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `WAL_Status` should have an upper camel case name
[INFO] [stdout]   --> src/database.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 27 | enum WAL_Status {
[INFO] [stdout]    |      ^^^^^^^^^^ help: convert the identifier to upper camel case: `WalStatus`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `WAL_Status` should have an upper camel case name
[INFO] [stdout]   --> src/database.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 27 | enum WAL_Status {
[INFO] [stdout]    |      ^^^^^^^^^^ help: convert the identifier to upper camel case: `WalStatus`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `node` is never read
[INFO] [stdout]    --> src/database.rs:188:25
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 let mut node = Rc::clone(incoming);
[INFO] [stdout]     |                         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `node` is never read
[INFO] [stdout]    --> src/database.rs:188:25
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 let mut node = Rc::clone(incoming);
[INFO] [stdout]     |                         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wal_writes`
[INFO] [stdout]    --> src/database.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |         let wal_writes = self.wal.lock().unwrap().insert(&k, &v);
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wal_writes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wal_writes`
[INFO] [stdout]    --> src/database.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |         let wal_writes = self.wal.lock().unwrap().insert(&k, &v);
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wal_writes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `WAL_THRESHOLD` is never used
[INFO] [stdout]   --> src/database.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const WAL_THRESHOLD: u16 = 100;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KV_THRESHOLD` is never used
[INFO] [stdout]   --> src/database.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const KV_THRESHOLD: u16 = 100;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `levels` is never read
[INFO] [stdout]    --> src/database.rs:146:5
[INFO] [stdout]     |
[INFO] [stdout] 145 | struct SkipList<K: Key, V: Value> {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 146 |     levels: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SkipList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `cardinality` is never read
[INFO] [stdout]    --> src/database.rs:242:5
[INFO] [stdout]     |
[INFO] [stdout] 241 | struct MemTable<K: Key, V: Value> {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 242 |     cardinality: u16,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `buffer` and `disk_manager` are never read
[INFO] [stdout]    --> src/database.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 291 | pub struct DB<K: Key, V: Value> {
[INFO] [stdout]     |            -- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 294 |     buffer: PageCache,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 295 |     disk_manager: DiskManager,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `freeze` is never used
[INFO] [stdout]    --> src/database.rs:337:8
[INFO] [stdout]     |
[INFO] [stdout] 298 | impl<K: Key, V: Value> DB<K, V> {
[INFO] [stdout]     | ------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 337 |     fn freeze(&self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `WAL_THRESHOLD` is never used
[INFO] [stdout]   --> src/database.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const WAL_THRESHOLD: u16 = 100;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KV_THRESHOLD` is never used
[INFO] [stdout]   --> src/database.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const KV_THRESHOLD: u16 = 100;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `levels` is never read
[INFO] [stdout]    --> src/database.rs:146:5
[INFO] [stdout]     |
[INFO] [stdout] 145 | struct SkipList<K: Key, V: Value> {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 146 |     levels: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SkipList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `cardinality` is never read
[INFO] [stdout]    --> src/database.rs:242:5
[INFO] [stdout]     |
[INFO] [stdout] 241 | struct MemTable<K: Key, V: Value> {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 242 |     cardinality: u16,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `buffer` and `disk_manager` are never read
[INFO] [stdout]    --> src/database.rs:294:5
[INFO] [stdout]     |
[INFO] [stdout] 291 | pub struct DB<K: Key, V: Value> {
[INFO] [stdout]     |            -- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 294 |     buffer: PageCache,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 295 |     disk_manager: DiskManager,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `freeze` is never used
[INFO] [stdout]    --> src/database.rs:337:8
[INFO] [stdout]     |
[INFO] [stdout] 298 | impl<K: Key, V: Value> DB<K, V> {
[INFO] [stdout]     | ------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 337 |     fn freeze(&self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.11s
[INFO] running `Command { std: "docker" "inspect" "63f8f6a3fac375dc14b503a7e2ad9ec74a4742143607a4181231c015189d09b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63f8f6a3fac375dc14b503a7e2ad9ec74a4742143607a4181231c015189d09b9", kill_on_drop: false }`
[INFO] [stdout] 63f8f6a3fac375dc14b503a7e2ad9ec74a4742143607a4181231c015189d09b9