[INFO] fetching crate br-mysql 0.0.4...
[INFO] checking br-mysql-0.0.4 against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] extracting crate br-mysql 0.0.4 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate br-mysql 0.0.4
[INFO] finished tweaking crates.io crate br-mysql 0.0.4
[INFO] tweaked toml for crates.io crate br-mysql 0.0.4 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate br-mysql 0.0.4 on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate br-mysql 0.0.4 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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce4832ee69480d80006e63ed55d70379b7afa92734441c81da012a3f1a78719d
[INFO] running `Command { std: "docker" "start" "-a" "ce4832ee69480d80006e63ed55d70379b7afa92734441c81da012a3f1a78719d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce4832ee69480d80006e63ed55d70379b7afa92734441c81da012a3f1a78719d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce4832ee69480d80006e63ed55d70379b7afa92734441c81da012a3f1a78719d", kill_on_drop: false }`
[INFO] [stdout] ce4832ee69480d80006e63ed55d70379b7afa92734441c81da012a3f1a78719d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86e4dec1f0298f135d46f5ddf654d2cdfaaa5f91cd2809529926c43f492af94f
[INFO] running `Command { std: "docker" "start" "-a" "86e4dec1f0298f135d46f5ddf654d2cdfaaa5f91cd2809529926c43f492af94f", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling rustix v0.38.21
[INFO] [stderr]     Checking linux-raw-sys v0.4.11
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking cpufeatures v0.2.11
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha1 v0.10.6
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking br-mysql v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/packet.rs:187:25
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     let index = buf.remove(0);
[INFO] [stdout]     |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/packet.rs:303:13
[INFO] [stdout]     |
[INFO] [stdout] 303 |         let index = buf.remove(0);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/packet.rs:338:17
[INFO] [stdout]     |
[INFO] [stdout] 338 |             let index = buf.remove(0);
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:241:17
[INFO] [stdout]     |
[INFO] [stdout] 241 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:251:17
[INFO] [stdout]     |
[INFO] [stdout] 251 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:256:17
[INFO] [stdout]     |
[INFO] [stdout] 256 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:261:17
[INFO] [stdout]     |
[INFO] [stdout] 261 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:266:17
[INFO] [stdout]     |
[INFO] [stdout] 266 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]    --> src/comm.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 174 | pub enum CapabilityFlags {
[INFO] [stdout]     |          --------------- variants in this enum
[INFO] [stdout] 175 |     ClientLongPassword,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 176 |     ClientFoundRows,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 177 |     ClientLongFlag,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 178 |     ClientConnectWithDb,
[INFO] [stdout] 179 |     ClientNoSchema,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 180 |     ClientCompress,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 181 |     ClientOdbc,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 182 |     ClientLocalFiles,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 183 |
[INFO] [stdout] 184 |     ClientIgnoreSpace,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 185 |     ClientProtocol41,
[INFO] [stdout] 186 |     ClientInteractive,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 187 |     ClientSsl,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 188 |     ClientIgnoreSigpipe,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 189 |
[INFO] [stdout] 190 |     ClientTransactions,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 191 |     ClientReserved,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 192 |     ClientSecureConnection,
[INFO] [stdout] 193 |     ClientMultiStatements,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 194 |
[INFO] [stdout] 195 |     ClientMultiResults,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 196 |     ClientPsMultiResults,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 201 |     ClientCanHandleExpiredPasswords,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 202 |     ClientSessionTrack,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 203 |     ClientDeprecateEof,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 204 |     ClientOptionalResultsetMetadata,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 207 |     ClientQueryAttributes,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 208 |     MultiFactorAuthentication,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 209 |
[INFO] [stdout] 210 |     ClientProgressObsolete,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 211 |     ClientSslVerifyServerCert,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 212 |     ClientRememberOptions,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 213 |     None,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CapabilityFlags` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CLIENT_QUERY_ATTRIBUTES` is never used
[INFO] [stdout]    --> src/comm.rs:249:7
[INFO] [stdout]     |
[INFO] [stdout] 249 | const CLIENT_QUERY_ATTRIBUTES: u32 = 1 << 8;
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]    --> src/comm.rs:273:12
[INFO] [stdout]     |
[INFO] [stdout] 251 | impl CapabilityFlags {
[INFO] [stdout]     | -------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 273 |     pub fn from(flags: u32) -> CapabilityFlags {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `COM_CHANGE_USER`, `COM_STMT_FETCH`, and `COM_STMT_FETCHS` are never used
[INFO] [stdout]    --> src/comm.rs:393:15
[INFO] [stdout]     |
[INFO] [stdout] 385 | impl Command {
[INFO] [stdout]     | ------------ associated constants in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 393 |     pub const COM_CHANGE_USER: u8 = 0x11;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 398 |     pub const COM_STMT_FETCH: u8 = 0x19;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout] 399 |     /// 返回的最大行数
[INFO] [stdout] 400 |     pub const COM_STMT_FETCHS: u8 = 0x22;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `UTF8_MB4_GENERAL_CI` is never used
[INFO] [stdout]  --> src/character_set.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl Charset {
[INFO] [stdout]   | ------------ associated constant in this implementation
[INFO] [stdout] 7 |     pub const NONE: u8 = 0;
[INFO] [stdout] 8 |     pub const UTF8_MB4_GENERAL_CI: u8 = 45;
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `last_insert_id`, `database`, `table`, and `character_set` are never read
[INFO] [stdout]   --> src/response.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct Response {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 12 |     last_insert_id: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     database: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 23 |     table: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 24 |     character_set: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Response` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking env_logger v0.10.1
[INFO] [stdout] warning: function `query_SELECT` should have a snake case name
[INFO] [stdout]   --> tests/index.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |         fn query_SELECT() {
[INFO] [stdout]    |            ^^^^^^^^^^^^ help: convert the identifier to snake case: `query_select`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `query_PROCESSLIST` should have a snake case name
[INFO] [stdout]   --> tests/index.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |         fn query_PROCESSLIST() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `query_processlist`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `execute_TRANSACTION` should have a snake case name
[INFO] [stdout]   --> tests/index.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |         fn execute_TRANSACTION() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `execute_transaction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/packet.rs:187:25
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     let index = buf.remove(0);
[INFO] [stdout]     |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/packet.rs:303:13
[INFO] [stdout]     |
[INFO] [stdout] 303 |         let index = buf.remove(0);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/packet.rs:338:17
[INFO] [stdout]     |
[INFO] [stdout] 338 |             let index = buf.remove(0);
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:241:17
[INFO] [stdout]     |
[INFO] [stdout] 241 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:251:17
[INFO] [stdout]     |
[INFO] [stdout] 251 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:256:17
[INFO] [stdout]     |
[INFO] [stdout] 256 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:261:17
[INFO] [stdout]     |
[INFO] [stdout] 261 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/packet.rs:266:17
[INFO] [stdout]     |
[INFO] [stdout] 266 |             let mut length = data.remove(0) as usize;
[INFO] [stdout]     |                 ----^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]    --> src/comm.rs:175:5
[INFO] [stdout]     |
[INFO] [stdout] 174 | pub enum CapabilityFlags {
[INFO] [stdout]     |          --------------- variants in this enum
[INFO] [stdout] 175 |     ClientLongPassword,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 176 |     ClientFoundRows,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 177 |     ClientLongFlag,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 178 |     ClientConnectWithDb,
[INFO] [stdout] 179 |     ClientNoSchema,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 180 |     ClientCompress,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 181 |     ClientOdbc,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 182 |     ClientLocalFiles,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 183 |
[INFO] [stdout] 184 |     ClientIgnoreSpace,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 185 |     ClientProtocol41,
[INFO] [stdout] 186 |     ClientInteractive,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 187 |     ClientSsl,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 188 |     ClientIgnoreSigpipe,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 189 |
[INFO] [stdout] 190 |     ClientTransactions,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 191 |     ClientReserved,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 192 |     ClientSecureConnection,
[INFO] [stdout] 193 |     ClientMultiStatements,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 194 |
[INFO] [stdout] 195 |     ClientMultiResults,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 196 |     ClientPsMultiResults,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 201 |     ClientCanHandleExpiredPasswords,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 202 |     ClientSessionTrack,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 203 |     ClientDeprecateEof,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 204 |     ClientOptionalResultsetMetadata,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 207 |     ClientQueryAttributes,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 208 |     MultiFactorAuthentication,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 209 |
[INFO] [stdout] 210 |     ClientProgressObsolete,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 211 |     ClientSslVerifyServerCert,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 212 |     ClientRememberOptions,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 213 |     None,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CapabilityFlags` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CLIENT_QUERY_ATTRIBUTES` is never used
[INFO] [stdout]    --> src/comm.rs:249:7
[INFO] [stdout]     |
[INFO] [stdout] 249 | const CLIENT_QUERY_ATTRIBUTES: u32 = 1 << 8;
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]    --> src/comm.rs:273:12
[INFO] [stdout]     |
[INFO] [stdout] 251 | impl CapabilityFlags {
[INFO] [stdout]     | -------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 273 |     pub fn from(flags: u32) -> CapabilityFlags {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `COM_CHANGE_USER`, `COM_STMT_FETCH`, and `COM_STMT_FETCHS` are never used
[INFO] [stdout]    --> src/comm.rs:393:15
[INFO] [stdout]     |
[INFO] [stdout] 385 | impl Command {
[INFO] [stdout]     | ------------ associated constants in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 393 |     pub const COM_CHANGE_USER: u8 = 0x11;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 398 |     pub const COM_STMT_FETCH: u8 = 0x19;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout] 399 |     /// 返回的最大行数
[INFO] [stdout] 400 |     pub const COM_STMT_FETCHS: u8 = 0x22;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `UTF8_MB4_GENERAL_CI` is never used
[INFO] [stdout]  --> src/character_set.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl Charset {
[INFO] [stdout]   | ------------ associated constant in this implementation
[INFO] [stdout] 7 |     pub const NONE: u8 = 0;
[INFO] [stdout] 8 |     pub const UTF8_MB4_GENERAL_CI: u8 = 45;
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `last_insert_id`, `database`, `table`, and `character_set` are never read
[INFO] [stdout]   --> src/response.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct Response {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 12 |     last_insert_id: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     database: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 23 |     table: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 24 |     character_set: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Response` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.61s
[INFO] running `Command { std: "docker" "inspect" "86e4dec1f0298f135d46f5ddf654d2cdfaaa5f91cd2809529926c43f492af94f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86e4dec1f0298f135d46f5ddf654d2cdfaaa5f91cd2809529926c43f492af94f", kill_on_drop: false }`
[INFO] [stdout] 86e4dec1f0298f135d46f5ddf654d2cdfaaa5f91cd2809529926c43f492af94f
