[INFO] cloning repository https://github.com/TrecApps/disk_reader
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TrecApps/disk_reader" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrecApps%2Fdisk_reader", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrecApps%2Fdisk_reader'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b3d375801bdab4b9478c17b07cf9c78a52396fe
[INFO] testing TrecApps/disk_reader against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrecApps%2Fdisk_reader" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TrecApps/disk_reader on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TrecApps/disk_reader
[INFO] finished tweaking git repo https://github.com/TrecApps/disk_reader
[INFO] tweaked toml for git repo https://github.com/TrecApps/disk_reader written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/TrecApps/disk_reader already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 479697adf635c40d1f1eb1777e77a600b60a120ee1d3a2eba959e96f3c096b01
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "479697adf635c40d1f1eb1777e77a600b60a120ee1d3a2eba959e96f3c096b01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "479697adf635c40d1f1eb1777e77a600b60a120ee1d3a2eba959e96f3c096b01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "479697adf635c40d1f1eb1777e77a600b60a120ee1d3a2eba959e96f3c096b01", kill_on_drop: false }`
[INFO] [stdout] 479697adf635c40d1f1eb1777e77a600b60a120ee1d3a2eba959e96f3c096b01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 050ba6e93725451b497d74cf1afb5f01a27e7e38777427f3076a25a6d4086d10
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "050ba6e93725451b497d74cf1afb5f01a27e7e38777427f3076a25a6d4086d10", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling disk_reader v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/disk/mbr.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let mut signature = u16::from_ne_bytes(buffer);
[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: field is never read: `reserved`
[INFO] [stdout]   --> src/disk/ntfs.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     reserved: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `reserved_2`
[INFO] [stdout]   --> src/disk/ntfs.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     reserved_2: [u8;3],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `oem`
[INFO] [stdout]   --> src/disk/fat.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     oem: [char;8],
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `FatBoot12_16`
[INFO] [stdout]   --> src/disk/fat.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct FatBoot12_16
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `FatBoot32`
[INFO] [stdout]   --> src/disk/fat.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct FatBoot32
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SuperblockExt`
[INFO] [stdout]   --> src/disk/ext.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct SuperblockExt
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ntfs.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ntfs.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         file.seek(SeekFrom::Start(start + (16 * 4)));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/fat.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/fat.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ext.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ext.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "050ba6e93725451b497d74cf1afb5f01a27e7e38777427f3076a25a6d4086d10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "050ba6e93725451b497d74cf1afb5f01a27e7e38777427f3076a25a6d4086d10", kill_on_drop: false }`
[INFO] [stdout] 050ba6e93725451b497d74cf1afb5f01a27e7e38777427f3076a25a6d4086d10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2dbe00168fbb23176984c8043dc449aa5a7f4c9d674ebda6d9ffa003f2e89d1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b2dbe00168fbb23176984c8043dc449aa5a7f4c9d674ebda6d9ffa003f2e89d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling disk_reader v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/disk/mbr.rs:81:13
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let mut signature = u16::from_ne_bytes(buffer);
[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: field is never read: `reserved`
[INFO] [stdout]   --> src/disk/ntfs.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     reserved: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `reserved_2`
[INFO] [stdout]   --> src/disk/ntfs.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     reserved_2: [u8;3],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `oem`
[INFO] [stdout]   --> src/disk/fat.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     oem: [char;8],
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `FatBoot12_16`
[INFO] [stdout]   --> src/disk/fat.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct FatBoot12_16
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `FatBoot32`
[INFO] [stdout]   --> src/disk/fat.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct FatBoot32
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SuperblockExt`
[INFO] [stdout]   --> src/disk/ext.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct SuperblockExt
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ntfs.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ntfs.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         file.seek(SeekFrom::Start(start + (16 * 4)));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/mbr.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/fat.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/fat.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ext.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |         file.seek(SeekFrom::Start(start));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/disk/ext.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         file.read(&mut buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "b2dbe00168fbb23176984c8043dc449aa5a7f4c9d674ebda6d9ffa003f2e89d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2dbe00168fbb23176984c8043dc449aa5a7f4c9d674ebda6d9ffa003f2e89d1", kill_on_drop: false }`
[INFO] [stdout] b2dbe00168fbb23176984c8043dc449aa5a7f4c9d674ebda6d9ffa003f2e89d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8bc5c31c6b8c29b694054edf4497f69d151d52fc235e955c52f8b87241d2395c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8bc5c31c6b8c29b694054edf4497f69d151d52fc235e955c52f8b87241d2395c", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/disk/mbr.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut signature = u16::from_ne_bytes(buffer);
[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: field is never read: `reserved`
[INFO] [stderr]   --> src/disk/ntfs.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     reserved: u32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `reserved_2`
[INFO] [stderr]   --> src/disk/ntfs.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     reserved_2: [u8;3],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `oem`
[INFO] [stderr]   --> src/disk/fat.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     oem: [char;8],
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `FatBoot12_16`
[INFO] [stderr]   --> src/disk/fat.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub struct FatBoot12_16
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `FatBoot32`
[INFO] [stderr]   --> src/disk/fat.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub struct FatBoot32
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SuperblockExt`
[INFO] [stderr]   --> src/disk/ext.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | struct SuperblockExt
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/ntfs.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         file.seek(SeekFrom::Start(start));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/ntfs.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |         file.read(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/mbr.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         file.seek(SeekFrom::Start(start));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/mbr.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         file.read(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/mbr.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         file.seek(SeekFrom::Start(start + (16 * 4)));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/mbr.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         file.read(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/fat.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |         file.seek(SeekFrom::Start(start));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/fat.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |         file.read(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/ext.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         file.seek(SeekFrom::Start(start));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/disk/ext.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         file.read(&mut buffer);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/disk_reader-a06a2669a7ef1869
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8bc5c31c6b8c29b694054edf4497f69d151d52fc235e955c52f8b87241d2395c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bc5c31c6b8c29b694054edf4497f69d151d52fc235e955c52f8b87241d2395c", kill_on_drop: false }`
[INFO] [stdout] 8bc5c31c6b8c29b694054edf4497f69d151d52fc235e955c52f8b87241d2395c