[INFO] fetching crate matroska-demuxer 0.2.0...
[INFO] checking matroska-demuxer-0.2.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate matroska-demuxer 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate matroska-demuxer 0.2.0 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 matroska-demuxer 0.2.0
[INFO] finished tweaking crates.io crate matroska-demuxer 0.2.0
[INFO] tweaked toml for crates.io crate matroska-demuxer 0.2.0 written to /workspace/builds/worker-12/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 5853d6554406d7066d4cc0c779930e2d2e2d5c53ec0ee9ee56c7e2faeb4f8101
[INFO] running `Command { std: "docker" "start" "-a" "5853d6554406d7066d4cc0c779930e2d2e2d5c53ec0ee9ee56c7e2faeb4f8101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5853d6554406d7066d4cc0c779930e2d2e2d5c53ec0ee9ee56c7e2faeb4f8101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5853d6554406d7066d4cc0c779930e2d2e2d5c53ec0ee9ee56c7e2faeb4f8101", kill_on_drop: false }`
[INFO] [stdout] 5853d6554406d7066d4cc0c779930e2d2e2d5c53ec0ee9ee56c7e2faeb4f8101
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 9f847d2d1e8a0a0d71408d19fe54d611f3d95a0ded01d1527d02535f8fff2fae
[INFO] running `Command { std: "docker" "start" "-a" "9f847d2d1e8a0a0d71408d19fe54d611f3d95a0ded01d1527d02535f8fff2fae", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking matroska-demuxer v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `primary_b_chromaticity_x`
[INFO] [stdout]    --> src/lib.rs:778:5
[INFO] [stdout]     |
[INFO] [stdout] 778 |     primary_b_chromaticity_x: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `primary_b_chromaticity_y`
[INFO] [stdout]    --> src/lib.rs:779:5
[INFO] [stdout]     |
[INFO] [stdout] 779 |     primary_b_chromaticity_y: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `white_point_chromaticity_x`
[INFO] [stdout]    --> src/lib.rs:780:5
[INFO] [stdout]     |
[INFO] [stdout] 780 |     white_point_chromaticity_x: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `white_point_chromaticity_y`
[INFO] [stdout]    --> src/lib.rs:781:5
[INFO] [stdout]     |
[INFO] [stdout] 781 |     white_point_chromaticity_y: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `target_type`
[INFO] [stdout]     --> src/lib.rs:1194:5
[INFO] [stdout]      |
[INFO] [stdout] 1194 |     target_type: Option<String>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `track`
[INFO] [stdout]     --> src/lib.rs:1337:5
[INFO] [stdout]      |
[INFO] [stdout] 1337 |     track: u64,
[INFO] [stdout]      |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `duration`
[INFO] [stdout]     --> src/lib.rs:1340:5
[INFO] [stdout]      |
[INFO] [stdout] 1340 |     duration: Option<u64>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `block_number`
[INFO] [stdout]     --> src/lib.rs:1341:5
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     block_number: Option<u64>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `primary_b_chromaticity_x`
[INFO] [stdout]    --> src/lib.rs:778:5
[INFO] [stdout]     |
[INFO] [stdout] 778 |     primary_b_chromaticity_x: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `primary_b_chromaticity_y`
[INFO] [stdout]    --> src/lib.rs:779:5
[INFO] [stdout]     |
[INFO] [stdout] 779 |     primary_b_chromaticity_y: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `white_point_chromaticity_x`
[INFO] [stdout]    --> src/lib.rs:780:5
[INFO] [stdout]     |
[INFO] [stdout] 780 |     white_point_chromaticity_x: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `white_point_chromaticity_y`
[INFO] [stdout]    --> src/lib.rs:781:5
[INFO] [stdout]     |
[INFO] [stdout] 781 |     white_point_chromaticity_y: Option<f64>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `target_type`
[INFO] [stdout]     --> src/lib.rs:1194:5
[INFO] [stdout]      |
[INFO] [stdout] 1194 |     target_type: Option<String>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `track`
[INFO] [stdout]     --> src/lib.rs:1337:5
[INFO] [stdout]      |
[INFO] [stdout] 1337 |     track: u64,
[INFO] [stdout]      |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `duration`
[INFO] [stdout]     --> src/lib.rs:1340:5
[INFO] [stdout]      |
[INFO] [stdout] 1340 |     duration: Option<u64>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `block_number`
[INFO] [stdout]     --> src/lib.rs:1341:5
[INFO] [stdout]      |
[INFO] [stdout] 1341 |     block_number: Option<u64>,
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "9f847d2d1e8a0a0d71408d19fe54d611f3d95a0ded01d1527d02535f8fff2fae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f847d2d1e8a0a0d71408d19fe54d611f3d95a0ded01d1527d02535f8fff2fae", kill_on_drop: false }`
[INFO] [stdout] 9f847d2d1e8a0a0d71408d19fe54d611f3d95a0ded01d1527d02535f8fff2fae