[INFO] fetching crate mt-interface 0.0.1-dev...
[INFO] checking mt-interface-0.0.1-dev against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate mt-interface 0.0.1-dev into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate mt-interface 0.0.1-dev
[INFO] finished tweaking crates.io crate mt-interface 0.0.1-dev
[INFO] tweaked toml for crates.io crate mt-interface 0.0.1-dev written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mt-interface 0.0.1-dev on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5708c0e2c25b1015836c43405a6d8c51f2eda5543ed0aafc8f5291ae18da279b
[INFO] running `Command { std: "docker" "start" "-a" "5708c0e2c25b1015836c43405a6d8c51f2eda5543ed0aafc8f5291ae18da279b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5708c0e2c25b1015836c43405a6d8c51f2eda5543ed0aafc8f5291ae18da279b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5708c0e2c25b1015836c43405a6d8c51f2eda5543ed0aafc8f5291ae18da279b", kill_on_drop: false }`
[INFO] [stdout] 5708c0e2c25b1015836c43405a6d8c51f2eda5543ed0aafc8f5291ae18da279b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 736d0862e76323e6b9b348c78f5afef2ee776e2a250e36b750fdb89db6f8f142
[INFO] running `Command { std: "docker" "start" "-a" "736d0862e76323e6b9b348c78f5afef2ee776e2a250e36b750fdb89db6f8f142", kill_on_drop: false }`
[INFO] [stderr]     Checking mt-interface v0.0.1-dev (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `GeneralSerialPacket` is never constructed
[INFO] [stdout]   --> src/lib.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub struct GeneralSerialPacket {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `data_len`, `cmd`, and `data` are never read
[INFO] [stdout]   --> src/lib.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct MtCommand {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 75 |     data_len: u8,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 76 |     cmd: MtCommandId,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 77 |     data: [u8; 256],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `mt_cmd` and `fcs` are never read
[INFO] [stdout]   --> src/lib.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub struct GeneralSerialPacket {
[INFO] [stdout]    |            ------------------- fields in this struct
[INFO] [stdout] 97 |     mt_cmd: MtCommand,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 98 |     fcs: u8,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_cmd` and `to_frame` are never used
[INFO] [stdout]    --> src/lib.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | impl GeneralSerialPacket {
[INFO] [stdout]     | ------------------------ associated items in this implementation
[INFO] [stdout] 102 |     fn from_cmd(mt_cmd: MtCommand) -> Self {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     fn to_frame(&self) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mt-interface` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `GeneralSerialPacket` is never constructed
[INFO] [stdout]   --> src/lib.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub struct GeneralSerialPacket {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `data_len`, `cmd`, and `data` are never read
[INFO] [stdout]   --> src/lib.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct MtCommand {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 75 |     data_len: u8,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 76 |     cmd: MtCommandId,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 77 |     data: [u8; 256],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `mt_cmd` and `fcs` are never read
[INFO] [stdout]   --> src/lib.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub struct GeneralSerialPacket {
[INFO] [stdout]    |            ------------------- fields in this struct
[INFO] [stdout] 97 |     mt_cmd: MtCommand,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 98 |     fcs: u8,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_cmd` and `to_frame` are never used
[INFO] [stdout]    --> src/lib.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | impl GeneralSerialPacket {
[INFO] [stdout]     | ------------------------ associated items in this implementation
[INFO] [stdout] 102 |     fn from_cmd(mt_cmd: MtCommand) -> Self {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     fn to_frame(&self) -> Vec<u8> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mt-interface` (lib) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "736d0862e76323e6b9b348c78f5afef2ee776e2a250e36b750fdb89db6f8f142", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "736d0862e76323e6b9b348c78f5afef2ee776e2a250e36b750fdb89db6f8f142", kill_on_drop: false }`
[INFO] [stdout] 736d0862e76323e6b9b348c78f5afef2ee776e2a250e36b750fdb89db6f8f142
