[INFO] fetching crate matroska 0.30.0...
[INFO] testing matroska-0.30.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate matroska 0.30.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate matroska 0.30.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate matroska 0.30.0
[INFO] tweaked toml for crates.io crate matroska 0.30.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate matroska 0.30.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate matroska 0.30.0 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" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d17ab9fc9d0bea63759c36f997fc2fb0cee56b4ab5b7d4000cc0d1b6639958a8
[INFO] running `Command { std: "docker" "start" "-a" "d17ab9fc9d0bea63759c36f997fc2fb0cee56b4ab5b7d4000cc0d1b6639958a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d17ab9fc9d0bea63759c36f997fc2fb0cee56b4ab5b7d4000cc0d1b6639958a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d17ab9fc9d0bea63759c36f997fc2fb0cee56b4ab5b7d4000cc0d1b6639958a8", kill_on_drop: false }`
[INFO] [stdout] d17ab9fc9d0bea63759c36f997fc2fb0cee56b4ab5b7d4000cc0d1b6639958a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cbc2710e849a3b97bb9783688ae2706deff2ca51a9566c17b273bd809982a3f1
[INFO] running `Command { std: "docker" "start" "-a" "cbc2710e849a3b97bb9783688ae2706deff2ca51a9566c17b273bd809982a3f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling phf_shared v0.11.1
[INFO] [stderr]    Compiling core2 v0.4.0
[INFO] [stderr]    Compiling bitstream-io v3.1.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling phf_generator v0.11.1
[INFO] [stderr]    Compiling phf_macros v0.11.1
[INFO] [stderr]    Compiling phf v0.11.1
[INFO] [stderr]    Compiling matroska v0.30.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ebml.rs:183:9
[INFO] [stdout]     |
[INFO] [stdout] 183 |     Int(i64),
[INFO] [stdout]     |     --- ^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ElementType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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] 183 -     Int(i64),
[INFO] [stdout] 183 +     Int(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.73s
[INFO] running `Command { std: "docker" "inspect" "cbc2710e849a3b97bb9783688ae2706deff2ca51a9566c17b273bd809982a3f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbc2710e849a3b97bb9783688ae2706deff2ca51a9566c17b273bd809982a3f1", kill_on_drop: false }`
[INFO] [stdout] cbc2710e849a3b97bb9783688ae2706deff2ca51a9566c17b273bd809982a3f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1e60f604d24a513cd13008cd97ad4722f901198d7d6a6920760767dc7d0af62
[INFO] running `Command { std: "docker" "start" "-a" "e1e60f604d24a513cd13008cd97ad4722f901198d7d6a6920760767dc7d0af62", kill_on_drop: false }`
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ebml.rs:183:9
[INFO] [stdout]     |
[INFO] [stdout] 183 |     Int(i64),
[INFO] [stdout]     |     --- ^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ElementType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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] 183 -     Int(i64),
[INFO] [stdout] 183 +     Int(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling matroska v0.30.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ebml.rs:183:9
[INFO] [stdout]     |
[INFO] [stdout] 183 |     Int(i64),
[INFO] [stdout]     |     --- ^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ElementType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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] 183 -     Int(i64),
[INFO] [stdout] 183 +     Int(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "e1e60f604d24a513cd13008cd97ad4722f901198d7d6a6920760767dc7d0af62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1e60f604d24a513cd13008cd97ad4722f901198d7d6a6920760767dc7d0af62", kill_on_drop: false }`
[INFO] [stdout] e1e60f604d24a513cd13008cd97ad4722f901198d7d6a6920760767dc7d0af62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c728c8f26bf3dc166f42adca540da6e0a326be028633d6cc2faf5ace938f2e93
[INFO] running `Command { std: "docker" "start" "-a" "c728c8f26bf3dc166f42adca540da6e0a326be028633d6cc2faf5ace938f2e93", kill_on_drop: false }`
[INFO] [stderr] warning: field `0` is never read
[INFO] [stdout] 
[INFO] [stderr]    --> src/ebml.rs:183:9
[INFO] [stdout] running 0 tests
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 183 |     Int(i64),
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]     |     --- ^^^
[INFO] [stdout] 
[INFO] [stderr]     |     |
[INFO] [stdout] 
[INFO] [stderr]     |     field in this variant
[INFO] [stdout] running 1 test
[INFO] [stderr]     |
[INFO] [stdout] test info ... ok
[INFO] [stderr]     = note: `ElementType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stderr] 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] [stderr]     |
[INFO] [stderr] 183 -     Int(i64),
[INFO] [stderr] 183 +     Int(()),
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `matroska` (lib) generated 1 warning
[INFO] [stderr] warning: `matroska` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/matroska-f096d1f29484f19d)
[INFO] [stderr]      Running tests/matroska.rs (/opt/rustwide/target/debug/deps/matroska-f77cf108ee2a4159)
[INFO] [stderr]    Doc-tests matroska
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 21) - compile ... ok
[INFO] [stdout] test src/lib.rs - (line 15) - compile ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.16s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c728c8f26bf3dc166f42adca540da6e0a326be028633d6cc2faf5ace938f2e93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c728c8f26bf3dc166f42adca540da6e0a326be028633d6cc2faf5ace938f2e93", kill_on_drop: false }`
[INFO] [stdout] c728c8f26bf3dc166f42adca540da6e0a326be028633d6cc2faf5ace938f2e93