[INFO] fetching crate walle_mqtt_protocol 0.1.15...
[INFO] testing walle_mqtt_protocol-0.1.15 against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] extracting crate walle_mqtt_protocol 0.1.15 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate walle_mqtt_protocol 0.1.15
[INFO] finished tweaking crates.io crate walle_mqtt_protocol 0.1.15
[INFO] tweaked toml for crates.io crate walle_mqtt_protocol 0.1.15 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate walle_mqtt_protocol 0.1.15 on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate walle_mqtt_protocol 0.1.15 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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6966f0217974d761a320d17d53faaa0f3a789361324958737e1ecaa5a5716baa
[INFO] running `Command { std: "docker" "start" "-a" "6966f0217974d761a320d17d53faaa0f3a789361324958737e1ecaa5a5716baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6966f0217974d761a320d17d53faaa0f3a789361324958737e1ecaa5a5716baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6966f0217974d761a320d17d53faaa0f3a789361324958737e1ecaa5a5716baa", kill_on_drop: false }`
[INFO] [stdout] 6966f0217974d761a320d17d53faaa0f3a789361324958737e1ecaa5a5716baa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d61ec7045533168039e551d83e0b9a07680fc4dadf994e7ad4cb88e2acb34eeb
[INFO] running `Command { std: "docker" "start" "-a" "d61ec7045533168039e551d83e0b9a07680fc4dadf994e7ad4cb88e2acb34eeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling serde v1.0.218
[INFO] [stderr]    Compiling once_cell v1.20.3
[INFO] [stderr]    Compiling anyhow v1.0.97
[INFO] [stderr]    Compiling tracing-core v0.1.33
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stderr]    Compiling serde_derive v1.0.218
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling thiserror v2.0.12
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling bytes v1.10.0
[INFO] [stderr]    Compiling walle_mqtt_protocol v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `connect_flags` is never read
[INFO] [stdout]    --> src/v4/connect.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |             connect_flags |= last_will.write(buffer)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 113 |             connect_flags |= login.write(buffer);
[INFO] [stdout]     |             ------------------------------------ `connect_flags` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `byte1` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:206:25
[INFO] [stdout]     |
[INFO] [stdout] 206 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stdout]     |                         ^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 209 |         QoS::AtMostOnce => byte1 = 0b0011_0000,
[INFO] [stdout]     |                            ------------------- `byte1` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `resp` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:522:27
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let mut resp: usize = 0;
[INFO] [stdout]     |                           ^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 562 |         resp = 4;
[INFO] [stdout]     |         -------- `resp` is overwritten here before the previous value is read
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_ack.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct PubAck {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 22 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubAck` 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: 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 derived impls for the traits `Clone` and `Debug`, but these are 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 derived impls for the traits `Clone` and `Debug`, but these are 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.57s
[INFO] running `Command { std: "docker" "inspect" "d61ec7045533168039e551d83e0b9a07680fc4dadf994e7ad4cb88e2acb34eeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d61ec7045533168039e551d83e0b9a07680fc4dadf994e7ad4cb88e2acb34eeb", kill_on_drop: false }`
[INFO] [stdout] d61ec7045533168039e551d83e0b9a07680fc4dadf994e7ad4cb88e2acb34eeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a74e1a4a9d68cfda33e00dab61bf6f0c0cfbf96dd923a68fb615b094584cae7
[INFO] running `Command { std: "docker" "start" "-a" "5a74e1a4a9d68cfda33e00dab61bf6f0c0cfbf96dd923a68fb615b094584cae7", kill_on_drop: false }`
[INFO] [stderr]    Compiling walle_mqtt_protocol v0.1.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `connect_flags` is never read
[INFO] [stdout]    --> src/v4/connect.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |             connect_flags |= last_will.write(buffer)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 113 |             connect_flags |= login.write(buffer);
[INFO] [stdout]     |             ------------------------------------ `connect_flags` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `byte1` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:206:25
[INFO] [stdout]     |
[INFO] [stdout] 206 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stdout]     |                         ^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 209 |         QoS::AtMostOnce => byte1 = 0b0011_0000,
[INFO] [stdout]     |                            ------------------- `byte1` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `resp` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:522:27
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let mut resp: usize = 0;
[INFO] [stdout]     |                           ^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 562 |         resp = 4;
[INFO] [stdout]     |         -------- `resp` is overwritten here before the previous value is read
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fixed_header` is never read
[INFO] [stdout]   --> src/v4/pub_ack.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct PubAck {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 22 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubAck` 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: 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 derived impls for the traits `Clone` and `Debug`, but these are 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 derived impls for the traits `Clone` and `Debug`, but these are 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: value assigned to `connect_flags` is never read
[INFO] [stdout]    --> src/v4/connect.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |             connect_flags |= last_will.write(buffer)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 113 |             connect_flags |= login.write(buffer);
[INFO] [stdout]     |             ------------------------------------ `connect_flags` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `byte1` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:206:25
[INFO] [stdout]     |
[INFO] [stdout] 206 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stdout]     |                         ^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 209 |         QoS::AtMostOnce => byte1 = 0b0011_0000,
[INFO] [stdout]     |                            ------------------- `byte1` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `resp` is never read
[INFO] [stdout]    --> src/v4/fixed_header.rs:522:27
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let mut resp: usize = 0;
[INFO] [stdout]     |                           ^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 562 |         resp = 4;
[INFO] [stdout]     |         -------- `resp` is overwritten here before the previous value is read
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_fixed_header` is never used
[INFO] [stdout]    --> src/v4/connect.rs:474:8
[INFO] [stdout]     |
[INFO] [stdout] 474 |     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:488:8
[INFO] [stdout]     |
[INFO] [stdout] 488 |     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:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct PubAck {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 22 |     fixed_header: FixedHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PubAck` 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: 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 derived impls for the traits `Clone` and `Debug`, but these are 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 derived impls for the traits `Clone` and `Debug`, but these are 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "5a74e1a4a9d68cfda33e00dab61bf6f0c0cfbf96dd923a68fb615b094584cae7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a74e1a4a9d68cfda33e00dab61bf6f0c0cfbf96dd923a68fb615b094584cae7", kill_on_drop: false }`
[INFO] [stdout] 5a74e1a4a9d68cfda33e00dab61bf6f0c0cfbf96dd923a68fb615b094584cae7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 01f11a061d836de8faf0d7cba71986cdd7076954d6c1f76294b1d2ce969a8d7a
[INFO] running `Command { std: "docker" "start" "-a" "01f11a061d836de8faf0d7cba71986cdd7076954d6c1f76294b1d2ce969a8d7a", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `connect_flags` is never read
[INFO] [stderr]    --> src/v4/connect.rs:110:13
[INFO] [stderr]     |
[INFO] [stderr] 110 |             connect_flags |= last_will.write(buffer)?;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 113 |             connect_flags |= login.write(buffer);
[INFO] [stderr]     |             ------------------------------------ `connect_flags` is overwritten here before the previous value is read
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[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] 
[INFO] [stderr] warning: value assigned to `byte1` is never read
[INFO] [stderr]    --> src/v4/fixed_header.rs:206:25
[INFO] [stderr]     |
[INFO] [stderr] 206 |     let mut byte1: u8 = 0b0000_0000;
[INFO] [stderr]     |                         ^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 209 |         QoS::AtMostOnce => byte1 = 0b0011_0000,
[INFO] [stderr]     |                            ------------------- `byte1` is overwritten here before the previous value is read
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `resp` is never read
[INFO] [stderr]    --> src/v4/fixed_header.rs:522:27
[INFO] [stderr]     |
[INFO] [stderr] 522 |     let mut resp: usize = 0;
[INFO] [stderr]     |                           ^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 562 |         resp = 4;
[INFO] [stderr]     |         -------- `resp` is overwritten here before the previous value is read
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `fixed_header` is never read
[INFO] [stderr]   --> src/v4/pub_ack.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct PubAck {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] 22 |     fixed_header: FixedHeader,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `PubAck` has derived impls for the traits `Clone` and `Debug`, but these are 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 derived impls for the traits `Clone` and `Debug`, but these are 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 derived impls for the traits `Clone` and `Debug`, but these are 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: function `build_fixed_header` is never used
[INFO] [stderr]    --> src/v4/connect.rs:474:8
[INFO] [stderr]     |
[INFO] [stderr] 474 |     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:488:8
[INFO] [stderr]     |
[INFO] [stderr] 488 |     fn build_connect_variable_header() -> Option<ConnectVariableHeader> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `walle_mqtt_protocol` (lib) generated 9 warnings
[INFO] [stderr] warning: `walle_mqtt_protocol` (lib test) generated 11 warnings (9 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/walle_mqtt_protocol-5558fad05f5f62eb)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test v4::builder::tests::build_connect_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::conn_ack::tests::encode_and_decode_for_connack_should_be_work ... ok
[INFO] [stdout] test v4::ping_req::tests::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::builder::tests::test ... ok
[INFO] [stdout] test v4::publish::tests::creat_qos2_message_test ... ok
[INFO] [stdout] test tests::test ... ok
[INFO] [stdout] test v4::subscribe::tests::encode_and_decode_subscribe_shoud_be_work ... ok
[INFO] [stdout] test v4::sub_ack::tests::test ... ok
[INFO] [stdout] test v4::un_subscribe::tests::encode_and_decode_subscribe_shoud_be_work ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests walle_mqtt_protocol
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 3) ... ok
[INFO] [stdout] test src/v4/builder.rs - v4::builder::ConnectBuilder (line 78) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.45s; merged doctests compilation took 0.44s
[INFO] running `Command { std: "docker" "inspect" "01f11a061d836de8faf0d7cba71986cdd7076954d6c1f76294b1d2ce969a8d7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01f11a061d836de8faf0d7cba71986cdd7076954d6c1f76294b1d2ce969a8d7a", kill_on_drop: false }`
[INFO] [stdout] 01f11a061d836de8faf0d7cba71986cdd7076954d6c1f76294b1d2ce969a8d7a
