[INFO] cloning repository https://github.com/gfreezy/lsm-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gfreezy/lsm-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgfreezy%2Flsm-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgfreezy%2Flsm-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8e0118a1006bebf59b91cf3ce4d8f0e86949a240
[INFO] checking gfreezy/lsm-rs against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgfreezy%2Flsm-rs" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gfreezy/lsm-rs on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gfreezy/lsm-rs
[INFO] finished tweaking git repo https://github.com/gfreezy/lsm-rs
[INFO] tweaked toml for git repo https://github.com/gfreezy/lsm-rs written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/gfreezy/lsm-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-rational v0.1.42
[INFO] [stderr]   Downloaded num-complex v0.1.43
[INFO] [stderr]   Downloaded failure v0.1.2
[INFO] [stderr]   Downloaded quote v0.6.8
[INFO] [stderr]   Downloaded failure_derive v0.1.2
[INFO] [stderr]   Downloaded backtrace v0.3.9
[INFO] [stderr]   Downloaded backtrace-sys v0.1.24
[INFO] [stderr]   Downloaded spectral v0.6.0
[INFO] [stderr]   Downloaded syn v0.14.9
[INFO] [stderr]   Downloaded synstructure v0.9.0
[INFO] [stderr]   Downloaded num-bigint v0.1.44
[INFO] [stderr]   Downloaded rustc-demangle v0.1.9
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5ca400986f769155197308c0bdb4b33f57d58c3bb6c8b7414a7036d9ff1e526
[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" "d5ca400986f769155197308c0bdb4b33f57d58c3bb6c8b7414a7036d9ff1e526", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5ca400986f769155197308c0bdb4b33f57d58c3bb6c8b7414a7036d9ff1e526", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5ca400986f769155197308c0bdb4b33f57d58c3bb6c8b7414a7036d9ff1e526", kill_on_drop: false }`
[INFO] [stdout] d5ca400986f769155197308c0bdb4b33f57d58c3bb6c8b7414a7036d9ff1e526
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2a9cd4ada7f7c2632b34d85c60977921a3cbc8abb6211d8b08bac34108e6489
[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" "d2a9cd4ada7f7c2632b34d85c60977921a3cbc8abb6211d8b08bac34108e6489", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking spectral v0.6.0
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking lsm-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `RECORD_EXTRA_SIZE`
[INFO] [stdout]  --> src/block.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | const RECORD_EXTRA_SIZE: usize = 7; // 7 bytes
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Full`
[INFO] [stdout]   --> src/block.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Full = 1,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `First`
[INFO] [stdout]   --> src/block.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     First = 2,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Middle`
[INFO] [stdout]   --> src/block.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Middle = 3,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Last`
[INFO] [stdout]   --> src/block.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Last = 4,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/block.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn new(typ: Type, data: &'a [u8]) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_to`
[INFO] [stdout]   --> src/block.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn write_to<W: WriteBytesExt>(&self, writer: &mut W) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `compute_checksum`
[INFO] [stdout]   --> src/block.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fn compute_checksum(typ: Type, data: &[u8]) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_records_from_buf`
[INFO] [stdout]   --> src/block.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn make_records_from_buf(free_block_size: usize, buf: &[u8]) -> Vec<Record> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `AvailableSpace`
[INFO] [stdout]  --> src/memtable.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     AvailableSpace,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ThresholdReached`
[INFO] [stdout]   --> src/memtable.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     ThresholdReached,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/memtable.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn new(max_size: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]   --> src/memtable.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn set(&mut self, key: Key, value: Value) -> Fallible<SetRet> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/memtable.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn get(&self, key: &[u8]) -> Option<Value> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/memtable.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn remove(&mut self, key: Key) -> Fallible<SetRet> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_threshold_reached`
[INFO] [stdout]   --> src/memtable.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn is_threshold_reached(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/memtable.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn get(&self, key: &[u8]) -> Option<&Value> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]   --> src/memtable.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn iter(&self) -> impl Iterator<Item = (&Key, &Value)> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SSTable`
[INFO] [stdout]  --> src/sstable.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct SSTable {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TOMBSTONE`
[INFO] [stdout]  --> src/types.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub const TOMBSTONE: &[u8] = &[0x6b, 0xe5, 0xa5, 0xa2];
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `WAL_LOG_MAX_SIZE`
[INFO] [stdout]  --> src/types.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub const WAL_LOG_MAX_SIZE: usize = 4 * 1024 * 1024;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BLOCK_MAX_SIZE`
[INFO] [stdout]  --> src/types.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub const BLOCK_MAX_SIZE: usize = 32 * 1024; // 32KB
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BLOCK_MIN_FREE_SIZE`
[INFO] [stdout]  --> src/types.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub const BLOCK_MIN_FREE_SIZE: usize = 6; // 6 bytes
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `path`
[INFO] [stdout]   --> src/wal.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/wal.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn new<P: AsRef<Path>>(path: P) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `make_records`
[INFO] [stdout]   --> src/wal.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn make_records<'a>(&self, buf: &'a [u8]) -> Vec<Record<'a>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_records`
[INFO] [stdout]   --> src/wal.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn write_records<'a>(&mut self, records: Vec<Record<'a>>) -> Fallible<Vec<Record<'a>>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_record`
[INFO] [stdout]   --> src/wal.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn write_record(&mut self, record: &Record) -> io::Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_block`
[INFO] [stdout]   --> src/wal.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn new_block(&mut self) -> io::Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_trailer`
[INFO] [stdout]   --> src/wal.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn write_trailer(&mut self) -> io::Result<()> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `free_space`
[INFO] [stdout]   --> src/wal.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn free_space(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `current_block_free_space`
[INFO] [stdout]   --> src/wal.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn current_block_free_space(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SSTable`
[INFO] [stdout]  --> src/sstable.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct SSTable {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `path`
[INFO] [stdout]   --> src/wal.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.94s
[INFO] running `Command { std: "docker" "inspect" "d2a9cd4ada7f7c2632b34d85c60977921a3cbc8abb6211d8b08bac34108e6489", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2a9cd4ada7f7c2632b34d85c60977921a3cbc8abb6211d8b08bac34108e6489", kill_on_drop: false }`
[INFO] [stdout] d2a9cd4ada7f7c2632b34d85c60977921a3cbc8abb6211d8b08bac34108e6489