[INFO] fetching crate walle_mqtt_protocol 0.1.9...
[INFO] testing walle_mqtt_protocol-0.1.9 against 1.75.0 for beta-1.76-1
[INFO] extracting crate walle_mqtt_protocol 0.1.9 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate walle_mqtt_protocol 0.1.9 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate walle_mqtt_protocol 0.1.9
[INFO] finished tweaking crates.io crate walle_mqtt_protocol 0.1.9
[INFO] tweaked toml for crates.io crate walle_mqtt_protocol 0.1.9 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-opentelemetry v0.18.0
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[INFO] [stdout] 37784668bb27b440b4c894012640ae63bf30a1a431eaf7d8ae27fbaa13750439
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[INFO] [stdout] 2f3fc939e83e0b476d955cdaa67eaae498b60fe06d7df0528c74a81f783dc206
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[INFO] [stderr]    Compiling walle_mqtt_protocol v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fixed_header`
[INFO] [stdout]  --> src/v4/dis_connect.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{decoder, fixed_header, Decoder, Encoder};
[INFO] [stdout]   |                      ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]  --> src/v4/fixed_header.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tracing::{debug, info};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]  --> src/v4/publish.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tracing::{debug, info};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FixedHeaderBuilder`
[INFO] [stdout]  --> src/v4/un_suback.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fixed_header::{FixedHeader, FixedHeaderBuilder},
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::v4::builder::MqttMessageBuilder`
[INFO] [stdout]  --> src/v4/un_suback.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::v4::builder::MqttMessageBuilder;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MessageType`
[INFO] [stdout]  --> src/v4/un_suback.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::{error::ProtoError, MessageType};
[INFO] [stdout]   |                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/v4/builder.rs:523:18
[INFO] [stdout]     |
[INFO] [stdout] 523 |     pub fn build(mut self) -> Result<Subscribe, ProtoError> {
[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/v4/builder.rs:648:18
[INFO] [stdout]     |
[INFO] [stdout] 648 |     pub fn build(mut self) -> Result<UnSubAck, ProtoError> {
[INFO] [stdout]     |                  ----^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/conn_ack.rs:170:34
[INFO] [stdout]     |
[INFO] [stdout] 170 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/v4/connect.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let count = self.fixed_header.encode(buffer).unwrap();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `connect_flags` is never read
[INFO] [stdout]    --> src/v4/connect.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             connect_flags |= login.write(buffer);
[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: `e`
[INFO] [stdout]    --> src/v4/connect.rs:155:17
[INFO] [stdout]     |
[INFO] [stdout] 155 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/v4/connect.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/connect.rs:209:35
[INFO] [stdout]     |
[INFO] [stdout] 209 |     fn decode(stream: &mut Bytes, qos: Option<QoS>) -> Result<ConnectVariableHeader, ProtoError> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/v4/decoder.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 x => return Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/v4/fixed_header.rs:91:18
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn check(mut byte1: &mut Bytes) -> Result<MessageType, BuildError> {
[INFO] [stdout]    |                  ----^^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `byte1` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:207:13
[INFO] [stdout]     |
[INFO] [stdout] 207 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/v4/fixed_header.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |     let mut byte1: u8 = 0b1000_0010;
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `resp` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:523:13
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut resp: usize = 0;
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/mod.rs:133:34
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `qos` is never read
[INFO] [stdout]    --> src/v4/builder.rs:538:5
[INFO] [stdout]     |
[INFO] [stdout] 537 | pub struct SubAckBuilder {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] 538 |     qos: QoS,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_ack.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct PubAck {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 23 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubAck` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_comp.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct PubComp {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 20 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubComp` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_rec.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct PubRec {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 20 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubRec` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_rel.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct PubRel {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 18 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubRel` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/v4/subscribe.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |                         temp.encode(buffer);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |                         let _ = temp.encode(buffer);
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.19s
[INFO] running `Command { std: "docker" "inspect" "2f3fc939e83e0b476d955cdaa67eaae498b60fe06d7df0528c74a81f783dc206", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f3fc939e83e0b476d955cdaa67eaae498b60fe06d7df0528c74a81f783dc206", kill_on_drop: false }`
[INFO] [stdout] 2f3fc939e83e0b476d955cdaa67eaae498b60fe06d7df0528c74a81f783dc206
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57c2e0594f0c677b67837b8f02bfaed7514c55a2e68eb551c096c73ed603d297
[INFO] running `Command { std: "docker" "start" "-a" "57c2e0594f0c677b67837b8f02bfaed7514c55a2e68eb551c096c73ed603d297", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `fixed_header`
[INFO] [stdout]  --> src/v4/dis_connect.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{decoder, fixed_header, Decoder, Encoder};
[INFO] [stdout]   |                      ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]  --> src/v4/fixed_header.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tracing::{debug, info};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]  --> src/v4/publish.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tracing::{debug, info};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FixedHeaderBuilder`
[INFO] [stdout]  --> src/v4/un_suback.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fixed_header::{FixedHeader, FixedHeaderBuilder},
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::v4::builder::MqttMessageBuilder`
[INFO] [stdout]  --> src/v4/un_suback.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::v4::builder::MqttMessageBuilder;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MessageType`
[INFO] [stdout]  --> src/v4/un_suback.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::{error::ProtoError, MessageType};
[INFO] [stdout]   |                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/v4/builder.rs:523:18
[INFO] [stdout]     |
[INFO] [stdout] 523 |     pub fn build(mut self) -> Result<Subscribe, ProtoError> {
[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/v4/builder.rs:648:18
[INFO] [stdout]     |
[INFO] [stdout] 648 |     pub fn build(mut self) -> Result<UnSubAck, ProtoError> {
[INFO] [stdout]     |                  ----^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/conn_ack.rs:170:34
[INFO] [stdout]     |
[INFO] [stdout] 170 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/v4/connect.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let count = self.fixed_header.encode(buffer).unwrap();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `connect_flags` is never read
[INFO] [stdout]    --> src/v4/connect.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             connect_flags |= login.write(buffer);
[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: `e`
[INFO] [stdout]    --> src/v4/connect.rs:155:17
[INFO] [stdout]     |
[INFO] [stdout] 155 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/v4/connect.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/connect.rs:209:35
[INFO] [stdout]     |
[INFO] [stdout] 209 |     fn decode(stream: &mut Bytes, qos: Option<QoS>) -> Result<ConnectVariableHeader, ProtoError> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/v4/decoder.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 x => return Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/v4/fixed_header.rs:91:18
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn check(mut byte1: &mut Bytes) -> Result<MessageType, BuildError> {
[INFO] [stdout]    |                  ----^^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `byte1` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:207:13
[INFO] [stdout]     |
[INFO] [stdout] 207 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/v4/fixed_header.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |     let mut byte1: u8 = 0b1000_0010;
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling walle_mqtt_protocol v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `resp` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:523:13
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut resp: usize = 0;
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/mod.rs:133:34
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `qos` is never read
[INFO] [stdout]    --> src/v4/builder.rs:538:5
[INFO] [stdout]     |
[INFO] [stdout] 537 | pub struct SubAckBuilder {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] 538 |     qos: QoS,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_ack.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct PubAck {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 23 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubAck` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_comp.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct PubComp {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 20 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubComp` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_rec.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct PubRec {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 20 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubRec` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_rel.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct PubRel {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 18 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubRel` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/v4/subscribe.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |                         temp.encode(buffer);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |                         let _ = temp.encode(buffer);
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fixed_header`
[INFO] [stdout]  --> src/v4/dis_connect.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{decoder, fixed_header, Decoder, Encoder};
[INFO] [stdout]   |                      ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]  --> src/v4/fixed_header.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tracing::{debug, info};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Buf`
[INFO] [stdout]   --> src/v4/ping_req.rs:76:17
[INFO] [stdout]    |
[INFO] [stdout] 76 |     use bytes::{Buf, BytesMut};
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]  --> src/v4/publish.rs:2:22
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tracing::{debug, info};
[INFO] [stdout]   |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Bytes`
[INFO] [stdout]    --> src/v4/publish.rs:271:17
[INFO] [stdout]     |
[INFO] [stdout] 271 |     use bytes::{Bytes, BytesMut};
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tracing::info`
[INFO] [stdout]    --> src/v4/publish.rs:272:9
[INFO] [stdout]     |
[INFO] [stdout] 272 |     use tracing::info;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `QoS`
[INFO] [stdout]    --> src/v4/sub_ack.rs:121:9
[INFO] [stdout]     |
[INFO] [stdout] 121 |         QoS,
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FixedHeaderBuilder`
[INFO] [stdout]  --> src/v4/un_suback.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fixed_header::{FixedHeader, FixedHeaderBuilder},
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::v4::builder::MqttMessageBuilder`
[INFO] [stdout]  --> src/v4/un_suback.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::v4::builder::MqttMessageBuilder;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MessageType`
[INFO] [stdout]  --> src/v4/un_suback.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::{error::ProtoError, MessageType};
[INFO] [stdout]   |                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/v4/builder.rs:523:18
[INFO] [stdout]     |
[INFO] [stdout] 523 |     pub fn build(mut self) -> Result<Subscribe, ProtoError> {
[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/v4/builder.rs:648:18
[INFO] [stdout]     |
[INFO] [stdout] 648 |     pub fn build(mut self) -> Result<UnSubAck, ProtoError> {
[INFO] [stdout]     |                  ----^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/conn_ack.rs:170:34
[INFO] [stdout]     |
[INFO] [stdout] 170 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/v4/connect.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let count = self.fixed_header.encode(buffer).unwrap();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `connect_flags` is never read
[INFO] [stdout]    --> src/v4/connect.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             connect_flags |= login.write(buffer);
[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: `e`
[INFO] [stdout]    --> src/v4/connect.rs:155:17
[INFO] [stdout]     |
[INFO] [stdout] 155 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/v4/connect.rs:236:17
[INFO] [stdout]     |
[INFO] [stdout] 236 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/connect.rs:209:35
[INFO] [stdout]     |
[INFO] [stdout] 209 |     fn decode(stream: &mut Bytes, qos: Option<QoS>) -> Result<ConnectVariableHeader, ProtoError> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fixed_header`
[INFO] [stdout]    --> src/v4/connect.rs:457:13
[INFO] [stdout]     |
[INFO] [stdout] 457 |         let fixed_header = FixedHeaderBuilder::new().connect().build();
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_fixed_header`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/v4/connect.rs:521:17
[INFO] [stdout]     |
[INFO] [stdout] 521 |             Err(err) => println!("编解码出错"),
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/v4/decoder.rs:136:17
[INFO] [stdout]     |
[INFO] [stdout] 136 |                 x => return Err(ProtoError::NotKnow),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/v4/fixed_header.rs:91:18
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub fn check(mut byte1: &mut Bytes) -> Result<MessageType, BuildError> {
[INFO] [stdout]    |                  ----^^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `byte1` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:207:13
[INFO] [stdout]     |
[INFO] [stdout] 207 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/v4/fixed_header.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |     let mut byte1: u8 = 0b1000_0010;
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `resp` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:523:13
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut resp: usize = 0;
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `remaining_len`
[INFO] [stdout]    --> src/v4/publish.rs:317:17
[INFO] [stdout]     |
[INFO] [stdout] 317 |             let remaining_len = publish.fixed_header.remaining_length();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remaining_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `qos`
[INFO] [stdout]    --> src/v4/mod.rs:133:34
[INFO] [stdout]     |
[INFO] [stdout] 133 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `qos` is never read
[INFO] [stdout]    --> src/v4/builder.rs:538:5
[INFO] [stdout]     |
[INFO] [stdout] 537 | pub struct SubAckBuilder {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] 538 |     qos: QoS,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_fixed_header` is never used
[INFO] [stdout]    --> src/v4/connect.rs:460:8
[INFO] [stdout]     |
[INFO] [stdout] 460 |     fn build_fixed_header() -> Option<FixedHeader> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_connect_variable_header` is never used
[INFO] [stdout]    --> src/v4/connect.rs:474:8
[INFO] [stdout]     |
[INFO] [stdout] 474 |     fn build_connect_variable_header() -> Option<ConnectVariableHeader> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_ack.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct PubAck {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 23 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubAck` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_comp.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct PubComp {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 20 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubComp` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_rec.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct PubRec {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 20 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubRec` 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 `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_rel.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct PubRel {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 18 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubRel` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/v4/ping_req.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |         ping_req.encode(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 86 |         let _ = ping_req.encode(&mut buffer);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/v4/publish.rs:292:13
[INFO] [stdout]     |
[INFO] [stdout] 292 |             publish.encode(&mut buffer);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 292 |             let _ = publish.encode(&mut buffer);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/v4/publish.rs:324:13
[INFO] [stdout]     |
[INFO] [stdout] 324 |             publish.encode(&mut buffer);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 324 |             let _ = publish.encode(&mut buffer);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/v4/publish.rs:337:13
[INFO] [stdout]     |
[INFO] [stdout] 337 |             publish1.encode(&mut buffer1);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 337 |             let _ = publish1.encode(&mut buffer1);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/v4/sub_ack.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |         resp.encode(&mut bytes);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 135 |         let _ = resp.encode(&mut bytes);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/v4/subscribe.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |                         temp.encode(buffer);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |                         let _ = temp.encode(buffer);
[INFO] [stdout]    |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/v4/subscribe.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |         sub.encode(&mut bytes);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let _ = sub.encode(&mut bytes);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/v4/un_subscribe.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |         sub.encode(&mut bytes);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let _ = sub.encode(&mut bytes);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 42 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "57c2e0594f0c677b67837b8f02bfaed7514c55a2e68eb551c096c73ed603d297", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57c2e0594f0c677b67837b8f02bfaed7514c55a2e68eb551c096c73ed603d297", kill_on_drop: false }`
[INFO] [stdout] 57c2e0594f0c677b67837b8f02bfaed7514c55a2e68eb551c096c73ed603d297
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7acd7a528e34f80a12807caa38f589de4741aae9956f57436277c262976fcccd
[INFO] running `Command { std: "docker" "start" "-a" "7acd7a528e34f80a12807caa38f589de4741aae9956f57436277c262976fcccd", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `fixed_header`
[INFO] [stderr]  --> src/v4/dis_connect.rs:1:22
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::{decoder, fixed_header, Decoder, Encoder};
[INFO] [stderr]   |                      ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `info`
[INFO] [stderr]  --> src/v4/fixed_header.rs:9:22
[INFO] [stderr]   |
[INFO] [stderr] 9 | use tracing::{debug, info};
[INFO] [stderr]   |                      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `info`
[INFO] [stderr]  --> src/v4/publish.rs:2:22
[INFO] [stderr]   |
[INFO] [stderr] 2 | use tracing::{debug, info};
[INFO] [stderr]   |                      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `FixedHeaderBuilder`
[INFO] [stderr]  --> src/v4/un_suback.rs:2:33
[INFO] [stderr]   |
[INFO] [stderr] 2 |     fixed_header::{FixedHeader, FixedHeaderBuilder},
[INFO] [stderr]   |                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::v4::builder::MqttMessageBuilder`
[INFO] [stderr]  --> src/v4/un_suback.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::v4::builder::MqttMessageBuilder;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `MessageType`
[INFO] [stderr]  --> src/v4/un_suback.rs:7:32
[INFO] [stderr]   |
[INFO] [stderr] 7 | use crate::{error::ProtoError, MessageType};
[INFO] [stderr]   |                                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/v4/builder.rs:523:18
[INFO] [stderr]     |
[INFO] [stderr] 523 |     pub fn build(mut self) -> Result<Subscribe, ProtoError> {
[INFO] [stderr]     |                  ----^^^^
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/v4/builder.rs:648:18
[INFO] [stderr]     |
[INFO] [stderr] 648 |     pub fn build(mut self) -> Result<UnSubAck, ProtoError> {
[INFO] [stderr]     |                  ----^^^^
[INFO] [stderr]     |                  |
[INFO] [stderr]     |                  help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `qos`
[INFO] [stderr]    --> src/v4/conn_ack.rs:170:34
[INFO] [stderr]     |
[INFO] [stderr] 170 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stderr]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/v4/connect.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |         let count = self.fixed_header.encode(buffer).unwrap();
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `connect_flags` is never read
[INFO] [stderr]    --> src/v4/connect.rs:113:13
[INFO] [stderr]     |
[INFO] [stderr] 113 |             connect_flags |= login.write(buffer);
[INFO] [stderr]     |             ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/v4/connect.rs:155:17
[INFO] [stderr]     |
[INFO] [stderr] 155 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/v4/connect.rs:236:17
[INFO] [stderr]     |
[INFO] [stderr] 236 |             Err(e) => Err(ProtoError::NotKnow),
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `qos`
[INFO] [stderr]    --> src/v4/connect.rs:209:35
[INFO] [stderr]     |
[INFO] [stderr] 209 |     fn decode(stream: &mut Bytes, qos: Option<QoS>) -> Result<ConnectVariableHeader, ProtoError> {
[INFO] [stderr]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/v4/decoder.rs:136:17
[INFO] [stderr]     |
[INFO] [stderr] 136 |                 x => return Err(ProtoError::NotKnow),
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/v4/fixed_header.rs:91:18
[INFO] [stderr]    |
[INFO] [stderr] 91 |     pub fn check(mut byte1: &mut Bytes) -> Result<MessageType, BuildError> {
[INFO] [stderr]    |                  ----^^^^^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `byte1` is never read
[INFO] [stderr]    --> src/v4/fixed_header.rs:207:13
[INFO] [stderr]     |
[INFO] [stderr] 207 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stderr]     |             ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/v4/fixed_header.rs:283:9
[INFO] [stderr]     |
[INFO] [stderr] 283 |     let mut byte1: u8 = 0b1000_0010;
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `resp` is never read
[INFO] [stderr]    --> src/v4/fixed_header.rs:523:13
[INFO] [stderr]     |
[INFO] [stderr] 523 |     let mut resp: usize = 0;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `qos`
[INFO] [stderr]    --> src/v4/mod.rs:133:34
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn decode(bytes: &mut Bytes, qos: Option<QoS>) -> Result<Self::Item, ProtoError> {
[INFO] [stderr]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_qos`
[INFO] [stderr] 
[INFO] [stderr] warning: field `qos` is never read
[INFO] [stderr]    --> src/v4/builder.rs:538:5
[INFO] [stderr]     |
[INFO] [stderr] 537 | pub struct SubAckBuilder {
[INFO] [stderr]     |            ------------- field in this struct
[INFO] [stderr] 538 |     qos: QoS,
[INFO] [stderr]     |     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `fixed_header` is never read
[INFO] [stderr]   --> src/v4/pub_ack.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub struct PubAck {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] 23 |     fixed_header: FixedHeader,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `PubAck` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `fixed_header` is never read
[INFO] [stderr]   --> src/v4/pub_comp.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct PubComp {
[INFO] [stderr]    |            ------- field in this struct
[INFO] [stderr] 20 |     fixed_header: FixedHeader,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `PubComp` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `fixed_header` is never read
[INFO] [stderr]   --> src/v4/pub_rec.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct PubRec {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] 20 |     fixed_header: FixedHeader,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `PubRec` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `fixed_header` is never read
[INFO] [stderr]   --> src/v4/pub_rel.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct PubRel {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] 18 |     fixed_header: FixedHeader,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `PubRel` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/v4/subscribe.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                         temp.encode(buffer);
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 71 |                         let _ = temp.encode(buffer);
[INFO] [stderr]    |                         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Buf`
[INFO] [stderr]   --> src/v4/ping_req.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |     use bytes::{Buf, BytesMut};
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Bytes`
[INFO] [stderr]    --> src/v4/publish.rs:271:17
[INFO] [stderr]     |
[INFO] [stderr] 271 |     use bytes::{Bytes, BytesMut};
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tracing::info`
[INFO] [stderr]    --> src/v4/publish.rs:272:9
[INFO] [stderr]     |
[INFO] [stderr] 272 |     use tracing::info;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `QoS`
[INFO] [stderr]    --> src/v4/sub_ack.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 121 |         QoS,
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `fixed_header`
[INFO] [stderr]    --> src/v4/connect.rs:457:13
[INFO] [stderr]     |
[INFO] [stderr] 457 |         let fixed_header = FixedHeaderBuilder::new().connect().build();
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_fixed_header`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/v4/connect.rs:521:17
[INFO] [stderr]     |
[INFO] [stderr] 521 |             Err(err) => println!("编解码出错"),
[INFO] [stderr]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remaining_len`
[INFO] [stderr]    --> src/v4/publish.rs:317:17
[INFO] [stderr]     |
[INFO] [stderr] 317 |             let remaining_len = publish.fixed_header.remaining_length();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remaining_len`
[INFO] [stderr] 
[INFO] [stderr] warning: function `build_fixed_header` is never used
[INFO] [stderr]    --> src/v4/connect.rs:460:8
[INFO] [stderr]     |
[INFO] [stderr] 460 |     fn build_fixed_header() -> Option<FixedHeader> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `build_connect_variable_header` is never used
[INFO] [stderr]    --> src/v4/connect.rs:474:8
[INFO] [stderr]     |
[INFO] [stderr] 474 |     fn build_connect_variable_header() -> Option<ConnectVariableHeader> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/v4/ping_req.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |         ping_req.encode(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 86 |         let _ = ping_req.encode(&mut buffer);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/v4/publish.rs:292:13
[INFO] [stderr]     |
[INFO] [stderr] 292 |             publish.encode(&mut buffer);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 292 |             let _ = publish.encode(&mut buffer);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/v4/publish.rs:324:13
[INFO] [stderr]     |
[INFO] [stderr] 324 |             publish.encode(&mut buffer);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 324 |             let _ = publish.encode(&mut buffer);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/v4/publish.rs:337:13
[INFO] [stderr]     |
[INFO] [stderr] 337 |             publish1.encode(&mut buffer1);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 337 |             let _ = publish1.encode(&mut buffer1);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/v4/sub_ack.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |         resp.encode(&mut bytes);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let _ = resp.encode(&mut bytes);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/v4/subscribe.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                         temp.encode(buffer);
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 71 |                         let _ = temp.encode(buffer);
[INFO] [stderr]    |                         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/v4/subscribe.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |         sub.encode(&mut bytes);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let _ = sub.encode(&mut bytes);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/v4/un_subscribe.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 127 |         sub.encode(&mut bytes);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 127 |         let _ = sub.encode(&mut bytes);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `walle_mqtt_protocol` (lib) generated 26 warnings (run `cargo fix --lib -p walle_mqtt_protocol` to apply 17 suggestions)
[INFO] [stderr] warning: `walle_mqtt_protocol` (lib test) generated 42 warnings (25 duplicates) (run `cargo fix --lib -p walle_mqtt_protocol --tests` to apply 7 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/walle_mqtt_protocol-4dec8de439fceeae)
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test v4::builder::tests::build_connect_test ... ok
[INFO] [stdout] test tests::test ... ok
[INFO] [stdout] test v4::conn_ack::tests::encode_and_decode_for_connack_should_be_work ... ok
[INFO] [stdout] test v4::builder::tests::test ... ok
[INFO] [stdout] test v4::connect::tests::test ... ok
[INFO] [stdout] test v4::connect::tests::encode_and_decode_for_connect_should_be_work ... ok
[INFO] [stdout] test v4::fixed_header::tests::builder_should_work ... ok
[INFO] [stdout] test v4::ping_req::tests::test ... ok
[INFO] [stdout] test v4::publish::tests::creat_qos2_message_test ... ok
[INFO] [stdout] test v4::publish::tests::publish_to_bytes ... ok
[INFO] [stdout] test v4::publish::tests::publish_to_bytes_test ... ok
[INFO] [stdout] test v4::sub_ack::tests::test ... ok
[INFO] [stdout] test v4::subscribe::tests::encode_and_decode_subscribe_shoud_be_work ... ok
[INFO] [stdout] test v4::un_subscribe::tests::encode_and_decode_subscribe_shoud_be_work ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests walle_mqtt_protocol
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/v4/builder.rs - v4::builder::ConnectBuilder (line 78) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 3) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/v4/builder.rs - v4::builder::ConnectBuilder (line 78) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]  --> src/v4/builder.rs:80:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core_mqtt_protocol::error::ProtoError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 4 | use walle_mqtt_protocol::error::ProtoError;
[INFO] [stdout]   |     ~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]  --> src/v4/builder.rs:82:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core_mqtt_protocol::v4::builder::MqttMessageBuilder;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 6 | use walle_mqtt_protocol::v4::builder::MqttMessageBuilder;
[INFO] [stdout]   |     ~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]  --> src/v4/builder.rs:83:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use core_mqtt_protocol::v4::connect::Connect;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 7 | use walle_mqtt_protocol::v4::connect::Connect;
[INFO] [stdout]   |     ~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `core_mqtt_protocol`
[INFO] [stdout]  --> src/v4/builder.rs:81:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core_mqtt_protocol::{MqttVersion, QoS};
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 5 | use walle_mqtt_protocol::{MqttVersion, QoS};
[INFO] [stdout]   |     ~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 3) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]  --> src/lib.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |    use core_mqtt_protocol::v4::builder::MqttMessageBuilder;
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 5 |    use walle_mqtt_protocol::v4::builder::MqttMessageBuilder;
[INFO] [stdout]   |        ~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `core_mqtt_protocol`
[INFO] [stdout]  --> src/lib.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |    use core_mqtt_protocol::{MqttVersion, QoS};
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^ use of undeclared crate or module `core_mqtt_protocol`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 4 |    use walle_mqtt_protocol::{MqttVersion, QoS};
[INFO] [stdout]   |        ~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 3)
[INFO] [stdout]     src/v4/builder.rs - v4::builder::ConnectBuilder (line 78)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "7acd7a528e34f80a12807caa38f589de4741aae9956f57436277c262976fcccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7acd7a528e34f80a12807caa38f589de4741aae9956f57436277c262976fcccd", kill_on_drop: false }`
[INFO] [stdout] 7acd7a528e34f80a12807caa38f589de4741aae9956f57436277c262976fcccd
