[INFO] fetching crate singer 0.3.0...
[INFO] testing singer-0.3.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate singer 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate singer 0.3.0
[INFO] finished tweaking crates.io crate singer 0.3.0
[INFO] tweaked toml for crates.io crate singer 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate singer 0.3.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32d4ce2ebf97eb52213bac866801bb654db6d389e1e747fecf02fa3bf08f6731
[INFO] running `Command { std: "docker" "start" "-a" "32d4ce2ebf97eb52213bac866801bb654db6d389e1e747fecf02fa3bf08f6731", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32d4ce2ebf97eb52213bac866801bb654db6d389e1e747fecf02fa3bf08f6731", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32d4ce2ebf97eb52213bac866801bb654db6d389e1e747fecf02fa3bf08f6731", kill_on_drop: false }`
[INFO] [stdout] 32d4ce2ebf97eb52213bac866801bb654db6d389e1e747fecf02fa3bf08f6731
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90ea115c5fa60b7dda2f719c9755a227cc0c5546240db7b89530fdf958ec60d5
[INFO] running `Command { std: "docker" "start" "-a" "90ea115c5fa60b7dda2f719c9755a227cc0c5546240db7b89530fdf958ec60d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling singer v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.58s
[INFO] running `Command { std: "docker" "inspect" "90ea115c5fa60b7dda2f719c9755a227cc0c5546240db7b89530fdf958ec60d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90ea115c5fa60b7dda2f719c9755a227cc0c5546240db7b89530fdf958ec60d5", kill_on_drop: false }`
[INFO] [stdout] 90ea115c5fa60b7dda2f719c9755a227cc0c5546240db7b89530fdf958ec60d5
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22c0a3f74167110a64923ffefc9944924d8ff345fa6fe9302c7ca75ea1657c61
[INFO] running `Command { std: "docker" "start" "-a" "22c0a3f74167110a64923ffefc9944924d8ff345fa6fe9302c7ca75ea1657c61", kill_on_drop: false }`
[INFO] [stderr]    Compiling singer v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0063]: missing field `version` in initializer of `Record`
[INFO] [stdout]   --> src/messages.rs:58:40
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let expected = Message::Record(Record {
[INFO] [stdout]    |                                        ^^^^^^ missing `version`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0063`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `singer` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "22c0a3f74167110a64923ffefc9944924d8ff345fa6fe9302c7ca75ea1657c61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22c0a3f74167110a64923ffefc9944924d8ff345fa6fe9302c7ca75ea1657c61", kill_on_drop: false }`
[INFO] [stdout] 22c0a3f74167110a64923ffefc9944924d8ff345fa6fe9302c7ca75ea1657c61