[INFO] fetching crate nrfdfu 0.1.3...
[INFO] checking nrfdfu-0.1.3 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate nrfdfu 0.1.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate nrfdfu 0.1.3 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nrfdfu 0.1.3
[INFO] finished tweaking crates.io crate nrfdfu 0.1.3
[INFO] tweaked toml for crates.io crate nrfdfu 0.1.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate nrfdfu 0.1.3 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpufeatures v0.1.4
[INFO] [stderr]   Downloaded expect-test v1.1.0
[INFO] [stderr]   Downloaded dissimilar v1.0.2
[INFO] [stderr]   Downloaded object v0.25.3
[INFO] [stderr]   Downloaded ferrous-serialport v4.0.2
[INFO] [stderr]   Downloaded nix v0.16.1
[INFO] [stderr]   Downloaded libudev v0.2.0
[INFO] [stderr]   Downloaded leb128 v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9808f041fb250cac294a272845940eba1cb0f37d2d2ea34ae7354e12e12f8a81
[INFO] running `Command { std: "docker" "start" "-a" "9808f041fb250cac294a272845940eba1cb0f37d2d2ea34ae7354e12e12f8a81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9808f041fb250cac294a272845940eba1cb0f37d2d2ea34ae7354e12e12f8a81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9808f041fb250cac294a272845940eba1cb0f37d2d2ea34ae7354e12e12f8a81", kill_on_drop: false }`
[INFO] [stdout] 9808f041fb250cac294a272845940eba1cb0f37d2d2ea34ae7354e12e12f8a81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb92f4bdfc9799ecd24c45e3c81a7edc3288587ad84f845239ea4bb0ad1d00d4
[INFO] running `Command { std: "docker" "start" "-a" "bb92f4bdfc9799ecd24c45e3c81a7edc3288587ad84f845239ea4bb0ad1d00d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking cpufeatures v0.1.4
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking expect-test v1.1.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking sha2 v0.9.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking ferrous-serialport v4.0.2
[INFO] [stderr]     Checking nrfdfu v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `part`, `variant`, `rom_size`, `ram_size`, and `rom_page_size` are never read
[INFO] [stdout]    --> src/messages.rs:181:5
[INFO] [stdout]     |
[INFO] [stdout] 179 | pub struct HardwareVersionResponse {
[INFO] [stdout]     |            ----------------------- fields in this struct
[INFO] [stdout] 180 |     // See FICR register docs
[INFO] [stdout] 181 |     part: u32,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 182 |     variant: u32,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 183 |     rom_size: u32,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 184 |     ram_size: u32,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 185 |     rom_page_size: u32,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `HardwareVersionResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/messages.rs:213:25
[INFO] [stdout]     |
[INFO] [stdout] 213 | pub struct PingResponse(pub u8);
[INFO] [stdout]     |            ------------ ^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `PingResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 213 | pub struct PingResponse(());
[INFO] [stdout]     |                         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `offset` and `crc` are never read
[INFO] [stdout]    --> src/messages.rs:237:9
[INFO] [stdout]     |
[INFO] [stdout] 235 | pub struct SelectResponse {
[INFO] [stdout]     |            -------------- fields in this struct
[INFO] [stdout] 236 |     pub max_size: u32,
[INFO] [stdout] 237 |     pub offset: u32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 238 |     pub crc: u32,
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SelectResponse` 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 `offset` is never read
[INFO] [stdout]    --> src/messages.rs:369:9
[INFO] [stdout]     |
[INFO] [stdout] 368 | pub struct CrcResponse {
[INFO] [stdout]     |            ----------- field in this struct
[INFO] [stdout] 369 |     pub offset: u32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CrcResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `part`, `variant`, `rom_size`, `ram_size`, and `rom_page_size` are never read
[INFO] [stdout]    --> src/messages.rs:181:5
[INFO] [stdout]     |
[INFO] [stdout] 179 | pub struct HardwareVersionResponse {
[INFO] [stdout]     |            ----------------------- fields in this struct
[INFO] [stdout] 180 |     // See FICR register docs
[INFO] [stdout] 181 |     part: u32,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 182 |     variant: u32,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 183 |     rom_size: u32,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 184 |     ram_size: u32,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 185 |     rom_page_size: u32,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `HardwareVersionResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/messages.rs:213:25
[INFO] [stdout]     |
[INFO] [stdout] 213 | pub struct PingResponse(pub u8);
[INFO] [stdout]     |            ------------ ^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `PingResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 213 | pub struct PingResponse(());
[INFO] [stdout]     |                         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `offset` and `crc` are never read
[INFO] [stdout]    --> src/messages.rs:237:9
[INFO] [stdout]     |
[INFO] [stdout] 235 | pub struct SelectResponse {
[INFO] [stdout]     |            -------------- fields in this struct
[INFO] [stdout] 236 |     pub max_size: u32,
[INFO] [stdout] 237 |     pub offset: u32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 238 |     pub crc: u32,
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SelectResponse` 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 `offset` is never read
[INFO] [stdout]    --> src/messages.rs:369:9
[INFO] [stdout]     |
[INFO] [stdout] 368 | pub struct CrcResponse {
[INFO] [stdout]     |            ----------- field in this struct
[INFO] [stdout] 369 |     pub offset: u32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CrcResponse` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.07s
[INFO] running `Command { std: "docker" "inspect" "bb92f4bdfc9799ecd24c45e3c81a7edc3288587ad84f845239ea4bb0ad1d00d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb92f4bdfc9799ecd24c45e3c81a7edc3288587ad84f845239ea4bb0ad1d00d4", kill_on_drop: false }`
[INFO] [stdout] bb92f4bdfc9799ecd24c45e3c81a7edc3288587ad84f845239ea4bb0ad1d00d4