[INFO] fetching crate mini_fat 0.1.0...
[INFO] checking mini_fat-0.1.0 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate mini_fat 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mini_fat 0.1.0 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mini_fat 0.1.0
[INFO] finished tweaking crates.io crate mini_fat 0.1.0
[INFO] tweaked toml for crates.io crate mini_fat 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd8a3d1d7de933fb278b9c4bb973c5e65b13cb220e61b5ffc52754a37728bf74
[INFO] running `Command { std: "docker" "start" "-a" "bd8a3d1d7de933fb278b9c4bb973c5e65b13cb220e61b5ffc52754a37728bf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd8a3d1d7de933fb278b9c4bb973c5e65b13cb220e61b5ffc52754a37728bf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd8a3d1d7de933fb278b9c4bb973c5e65b13cb220e61b5ffc52754a37728bf74", kill_on_drop: false }`
[INFO] [stdout] bd8a3d1d7de933fb278b9c4bb973c5e65b13cb220e61b5ffc52754a37728bf74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7fc6f4fd484bd28e251317f581f01be278bc6dfda9f4c31afbe415dca1ab6fe7
[INFO] running `Command { std: "docker" "start" "-a" "7fc6f4fd484bd28e251317f581f01be278bc6dfda9f4c31afbe415dca1ab6fe7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking mini_fat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `jmp_boot`
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     jmp_boot: [u8; 3],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `oem_name`
[INFO] [stdout]   --> src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     oem_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `media`
[INFO] [stdout]   --> src/lib.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     media: u8,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sectors_per_track`
[INFO] [stdout]   --> src/lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     sectors_per_track: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `num_heads`
[INFO] [stdout]   --> src/lib.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     num_heads: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hidden_sectors`
[INFO] [stdout]   --> src/lib.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     hidden_sectors: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ext_flags`
[INFO] [stdout]   --> src/lib.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     ext_flags: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fs_version`
[INFO] [stdout]   --> src/lib.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fs_version: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fs_info`
[INFO] [stdout]   --> src/lib.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fs_info: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bk_boot_sector`
[INFO] [stdout]   --> src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     bk_boot_sector: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `drive_number`
[INFO] [stdout]   --> src/lib.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     drive_number: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `boot_signature`
[INFO] [stdout]   --> src/lib.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     boot_signature: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `volume_id`
[INFO] [stdout]   --> src/lib.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     volume_id: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `volume_label`
[INFO] [stdout]   --> src/lib.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     volume_label: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `file_system_type`
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     file_system_type: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `signature`
[INFO] [stdout]   --> src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     signature: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `order`
[INFO] [stdout]    --> src/lib.rs:277:5
[INFO] [stdout]     |
[INFO] [stdout] 277 |     order: u8,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attributes`
[INFO] [stdout]    --> src/lib.rs:279:5
[INFO] [stdout]     |
[INFO] [stdout] 279 |     attributes: u8,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `checksum`
[INFO] [stdout]    --> src/lib.rs:280:5
[INFO] [stdout]     |
[INFO] [stdout] 280 |     checksum: u8,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `jmp_boot`
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     jmp_boot: [u8; 3],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `oem_name`
[INFO] [stdout]   --> src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     oem_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `media`
[INFO] [stdout]   --> src/lib.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     media: u8,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sectors_per_track`
[INFO] [stdout]   --> src/lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     sectors_per_track: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `num_heads`
[INFO] [stdout]   --> src/lib.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     num_heads: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hidden_sectors`
[INFO] [stdout]   --> src/lib.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     hidden_sectors: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ext_flags`
[INFO] [stdout]   --> src/lib.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     ext_flags: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fs_version`
[INFO] [stdout]   --> src/lib.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fs_version: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fs_info`
[INFO] [stdout]   --> src/lib.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     fs_info: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `bk_boot_sector`
[INFO] [stdout]   --> src/lib.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     bk_boot_sector: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `drive_number`
[INFO] [stdout]   --> src/lib.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     drive_number: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `boot_signature`
[INFO] [stdout]   --> src/lib.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     boot_signature: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `volume_id`
[INFO] [stdout]   --> src/lib.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     volume_id: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `volume_label`
[INFO] [stdout]   --> src/lib.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     volume_label: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `file_system_type`
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     file_system_type: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `signature`
[INFO] [stdout]   --> src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     signature: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `order`
[INFO] [stdout]    --> src/lib.rs:277:5
[INFO] [stdout]     |
[INFO] [stdout] 277 |     order: u8,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attributes`
[INFO] [stdout]    --> src/lib.rs:279:5
[INFO] [stdout]     |
[INFO] [stdout] 279 |     attributes: u8,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `checksum`
[INFO] [stdout]    --> src/lib.rs:280:5
[INFO] [stdout]     |
[INFO] [stdout] 280 |     checksum: u8,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.68s
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7fc6f4fd484bd28e251317f581f01be278bc6dfda9f4c31afbe415dca1ab6fe7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fc6f4fd484bd28e251317f581f01be278bc6dfda9f4c31afbe415dca1ab6fe7", kill_on_drop: false }`
[INFO] [stdout] 7fc6f4fd484bd28e251317f581f01be278bc6dfda9f4c31afbe415dca1ab6fe7