[INFO] cloning repository https://github.com/lryan599/mini-redis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lryan599/mini-redis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flryan599%2Fmini-redis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flryan599%2Fmini-redis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d7db4ecb647a998cd8c0829fd2b273fce2b49f71
[INFO] checking lryan599/mini-redis against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flryan599%2Fmini-redis" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lryan599/mini-redis
[INFO] finished tweaking git repo https://github.com/lryan599/mini-redis
[INFO] tweaked toml for git repo https://github.com/lryan599/mini-redis written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lryan599/mini-redis on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lryan599/mini-redis 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3a2375ea2a1b48e14e5baba01e79ac7446df8ae818dc53f68b40d25629be873
[INFO] running `Command { std: "docker" "start" "-a" "a3a2375ea2a1b48e14e5baba01e79ac7446df8ae818dc53f68b40d25629be873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3a2375ea2a1b48e14e5baba01e79ac7446df8ae818dc53f68b40d25629be873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3a2375ea2a1b48e14e5baba01e79ac7446df8ae818dc53f68b40d25629be873", kill_on_drop: false }`
[INFO] [stdout] a3a2375ea2a1b48e14e5baba01e79ac7446df8ae818dc53f68b40d25629be873
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d27a1f4c8d4d9351bebe9a51c61ab43a64d098d483a686a6289cda6dabaaccb8
[INFO] running `Command { std: "docker" "start" "-a" "d27a1f4c8d4d9351bebe9a51c61ab43a64d098d483a686a6289cda6dabaaccb8", kill_on_drop: false }`
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[INFO] [stderr]    Compiling unicode-ident v1.0.11
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[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.32
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[INFO] [stderr]     Checking regex-automata v0.3.8
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[INFO] [stderr]     Checking mini-redis v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops::Mul`
[INFO] [stdout]  --> src/cmd/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Mul;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/multi.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Connection, Frame, Parse, ParseError};
[INFO] [stdout]   |                                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/exec.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Connection, Frame, Parse, ParseError};
[INFO] [stdout]   |                                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/discard.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Connection, Frame, Parse, ParseError};
[INFO] [stdout]   |                                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/incr.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::cmd::{Parse, ParseError};
[INFO] [stdout]   |                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/db.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Mul`
[INFO] [stdout]  --> src/cmd/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Mul;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/multi.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Connection, Frame, Parse, ParseError};
[INFO] [stdout]   |                                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/exec.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Connection, Frame, Parse, ParseError};
[INFO] [stdout]   |                                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/discard.rs:1:39
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Connection, Frame, Parse, ParseError};
[INFO] [stdout]   |                                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/cmd/incr.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::cmd::{Parse, ParseError};
[INFO] [stdout]   |                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/db.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/db.rs:313:21
[INFO] [stdout]     |
[INFO] [stdout] 313 |         if let Some(v) = state.entries.remove(key) {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:322:13
[INFO] [stdout]     |
[INFO] [stdout] 322 |         let mut state = self.shared.state.lock().unwrap();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/multi.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Multi {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/exec.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Exec {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/discard.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Discard {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/del.rs:52:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Del {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/incr.rs:72:19
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Incr {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `save_state` is never used
[INFO] [stdout]    --> src/db.rs:321:8
[INFO] [stdout]     |
[INFO] [stdout] 121 | impl Db {
[INFO] [stdout]     | ------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 321 |     fn save_state(&self) -> crate::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `save` is never used
[INFO] [stdout]    --> src/db.rs:382:8
[INFO] [stdout]     |
[INFO] [stdout] 374 | impl State {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 382 |     fn save(&self) {}
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/db.rs:313:21
[INFO] [stdout]     |
[INFO] [stdout] 313 |         if let Some(v) = state.entries.remove(key) {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/db.rs:322:13
[INFO] [stdout]     |
[INFO] [stdout] 322 |         let mut state = self.shared.state.lock().unwrap();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/multi.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Multi {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/exec.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Exec {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/discard.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Discard {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/del.rs:52:19
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Del {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_frame` is never used
[INFO] [stdout]   --> src/cmd/incr.rs:72:19
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Incr {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub(crate) fn into_frame(self) -> Frame {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `save_state` is never used
[INFO] [stdout]    --> src/db.rs:321:8
[INFO] [stdout]     |
[INFO] [stdout] 121 | impl Db {
[INFO] [stdout]     | ------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 321 |     fn save_state(&self) -> crate::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `save` is never used
[INFO] [stdout]    --> src/db.rs:382:8
[INFO] [stdout]     |
[INFO] [stdout] 374 | impl State {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 382 |     fn save(&self) {}
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `OpenOptions`
[INFO] [stdout]  --> tests/rdb_reader.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::{File, OpenOptions};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `vec`
[INFO] [stdout]  --> tests/rdb_reader.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{io, u8, vec};
[INFO] [stdout]   |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/rdb_reader.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     STRING(String),
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Decoding` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 37 -     STRING(String),
[INFO] [stdout] 37 +     STRING(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/rdb_reader.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     I8(i8),
[INFO] [stdout]    |     -- ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Decoding` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 38 -     I8(i8),
[INFO] [stdout] 38 +     I8(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/rdb_reader.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     I16(i16),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Decoding` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 39 -     I16(i16),
[INFO] [stdout] 39 +     I16(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/rdb_reader.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     I32(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Decoding` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 40 -     I32(i32),
[INFO] [stdout] 40 +     I32(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> tests/rdb_reader.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 51 | struct RDB {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 52 |     // 0x5245444953, "redis"
[INFO] [stdout] 53 |     magic_string: [u8; 5],
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 54 |     // 读时不检查RDB版本，但写为0x30303039
[INFO] [stdout] 55 |     version: [u8; 4],
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 56 |     // metadata最多由三个FA组成
[INFO] [stdout] 57 |     metadata: Bytes,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 58 |     // 只考虑一个数据库，0xFE00
[INFO] [stdout] 59 |     db_selector: [u8; 2],
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 60 |     // 以FB开头，后接两个length-int
[INFO] [stdout] 61 |     resize_db: Bytes,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 62 |     // 以FD开头，后接一个$unsigned int代表时间戳，后面是$value-type，$string-encoded-key和$encoded-value
[INFO] [stdout] 63 |     kv_expiry: Bytes,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 64 |     // 以FC开头，后接一个$unsigned long代表时间戳，后面是$value-type，$string-encoded-key和$encoded-value
[INFO] [stdout] 65 |     kv_expiry_ms: Bytes,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 66 |     // 没有过期限制的KV，由$value-type，$string-encoded-key和$encoded-value组成
[INFO] [stdout] 67 |     kv: Bytes,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.00s
[INFO] running `Command { std: "docker" "inspect" "d27a1f4c8d4d9351bebe9a51c61ab43a64d098d483a686a6289cda6dabaaccb8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d27a1f4c8d4d9351bebe9a51c61ab43a64d098d483a686a6289cda6dabaaccb8", kill_on_drop: false }`
[INFO] [stdout] d27a1f4c8d4d9351bebe9a51c61ab43a64d098d483a686a6289cda6dabaaccb8
