[INFO] fetching crate signum 0.2.1...
[INFO] checking signum-0.2.1 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate signum 0.2.1 into /workspace/builds/worker-94/source
[INFO] validating manifest of crates.io crate signum 0.2.1 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate signum 0.2.1
[INFO] finished tweaking crates.io crate signum 0.2.1
[INFO] tweaked toml for crates.io crate signum 0.2.1 written to /workspace/builds/worker-94/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 435b1260db73a342e37ce3545df3dc4bd65af87ed3f71960fb9f0e003b55e63b
[INFO] running `Command { std: "docker" "start" "-a" "435b1260db73a342e37ce3545df3dc4bd65af87ed3f71960fb9f0e003b55e63b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "435b1260db73a342e37ce3545df3dc4bd65af87ed3f71960fb9f0e003b55e63b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "435b1260db73a342e37ce3545df3dc4bd65af87ed3f71960fb9f0e003b55e63b", kill_on_drop: false }`
[INFO] [stdout] 435b1260db73a342e37ce3545df3dc4bd65af87ed3f71960fb9f0e003b55e63b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8620d7c99499b84386debeb072f9ebee14787b5157321da0fd59d49dcd0d0b9d
[INFO] running `Command { std: "docker" "start" "-a" "8620d7c99499b84386debeb072f9ebee14787b5157321da0fd59d49dcd0d0b9d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling ryu v1.0.6
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]     Checking bitvec v0.19.6
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking signum v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `space_width`
[INFO] [stdout]   --> src/docs/sysp.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     space_width: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `letter_spacing`
[INFO] [stdout]   --> src/docs/sysp.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     letter_spacing: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `line_distance`
[INFO] [stdout]   --> src/docs/sysp.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     line_distance: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `index_distance`
[INFO] [stdout]   --> src/docs/sysp.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     index_distance: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `margin_left`
[INFO] [stdout]   --> src/docs/sysp.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     margin_left: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `margin_right`
[INFO] [stdout]   --> src/docs/sysp.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     margin_right: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `header`
[INFO] [stdout]   --> src/docs/sysp.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     header: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `footer`
[INFO] [stdout]   --> src/docs/sysp.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     footer: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `page_length`
[INFO] [stdout]   --> src/docs/sysp.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     page_length: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `page_numbering`
[INFO] [stdout]   --> src/docs/sysp.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     page_numbering: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `format_options`
[INFO] [stdout]   --> src/docs/sysp.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     format_options: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opts_2`
[INFO] [stdout]   --> src/docs/sysp.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     opts_2: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opts_3`
[INFO] [stdout]   --> src/docs/sysp.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     opts_3: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opts_4`
[INFO] [stdout]   --> src/docs/sysp.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     opts_4: Bytes32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `charsets`
[INFO] [stdout]   --> src/docs/mod.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     charsets: Vec<Cow<'a, str>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size`
[INFO] [stdout]   --> src/images/imc.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     size: u32,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]   --> src/images/imc.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     width: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> src/images/imc.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     height: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size_of_data`
[INFO] [stdout]   --> src/images/imc.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     size_of_data: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `u4`
[INFO] [stdout]   --> src/images/imc.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     u4: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `u5`
[INFO] [stdout]   --> src/images/imc.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     u5: Bytes32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `u6`
[INFO] [stdout]   --> src/images/imc.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     u6: Bytes32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `space_width`
[INFO] [stdout]   --> src/docs/sysp.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     space_width: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `letter_spacing`
[INFO] [stdout]   --> src/docs/sysp.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     letter_spacing: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `line_distance`
[INFO] [stdout]   --> src/docs/sysp.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     line_distance: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `index_distance`
[INFO] [stdout]   --> src/docs/sysp.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     index_distance: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `margin_left`
[INFO] [stdout]   --> src/docs/sysp.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     margin_left: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `margin_right`
[INFO] [stdout]   --> src/docs/sysp.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     margin_right: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `header`
[INFO] [stdout]   --> src/docs/sysp.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     header: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `footer`
[INFO] [stdout]   --> src/docs/sysp.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     footer: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `page_length`
[INFO] [stdout]   --> src/docs/sysp.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     page_length: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `page_numbering`
[INFO] [stdout]   --> src/docs/sysp.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     page_numbering: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `format_options`
[INFO] [stdout]   --> src/docs/sysp.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     format_options: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opts_2`
[INFO] [stdout]   --> src/docs/sysp.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     opts_2: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opts_3`
[INFO] [stdout]   --> src/docs/sysp.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     opts_3: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `opts_4`
[INFO] [stdout]   --> src/docs/sysp.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     opts_4: Bytes32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `charsets`
[INFO] [stdout]   --> src/docs/mod.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     charsets: Vec<Cow<'a, str>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size`
[INFO] [stdout]   --> src/images/imc.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     size: u32,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]   --> src/images/imc.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     width: u16,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> src/images/imc.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     height: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size_of_data`
[INFO] [stdout]   --> src/images/imc.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     size_of_data: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `u4`
[INFO] [stdout]   --> src/images/imc.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     u4: Bytes16,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `u5`
[INFO] [stdout]   --> src/images/imc.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     u5: Bytes32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `u6`
[INFO] [stdout]   --> src/images/imc.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     u6: Bytes32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.53s
[INFO] running `Command { std: "docker" "inspect" "8620d7c99499b84386debeb072f9ebee14787b5157321da0fd59d49dcd0d0b9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8620d7c99499b84386debeb072f9ebee14787b5157321da0fd59d49dcd0d0b9d", kill_on_drop: false }`
[INFO] [stdout] 8620d7c99499b84386debeb072f9ebee14787b5157321da0fd59d49dcd0d0b9d