[INFO] fetching crate fhir-rs 0.1.0...
[INFO] testing fhir-rs-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate fhir-rs 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate fhir-rs 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate fhir-rs 0.1.0
[INFO] tweaked toml for crates.io crate fhir-rs 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fhir-rs 0.1.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 195 packages to latest compatible versions
[INFO] [stderr]       Adding axum v0.7.9 (available: v0.8.6)
[INFO] [stderr]       Adding json-event-parser v0.1.1 (available: v0.2.2)
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.12.23)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[INFO] [stderr]       Adding xml-rs v0.8.27 (available: v1.0.0)
[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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 4610846776d4d06037228fbd41eba50083163c5214feaaebd2df051e3b4424b2
[INFO] running `Command { std: "docker" "start" "-a" "4610846776d4d06037228fbd41eba50083163c5214feaaebd2df051e3b4424b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4610846776d4d06037228fbd41eba50083163c5214feaaebd2df051e3b4424b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4610846776d4d06037228fbd41eba50083163c5214feaaebd2df051e3b4424b2", kill_on_drop: false }`
[INFO] [stdout] 4610846776d4d06037228fbd41eba50083163c5214feaaebd2df051e3b4424b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 60e3293f73583ec2d41211abaf73eb82f76846206e79842ff459dd5b268db199
[INFO] running `Command { std: "docker" "start" "-a" "60e3293f73583ec2d41211abaf73eb82f76846206e79842ff459dd5b268db199", kill_on_drop: false }`
[INFO] [stderr]    Compiling xml-rs v0.8.27
[INFO] [stderr]    Compiling json_pretty v0.1.2
[INFO] [stderr]    Compiling json-event-parser v0.1.1
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling fhir-derive v0.1.0
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling fhir-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/ser/xml_serializer.rs:380:32
[INFO] [stdout]     |
[INFO] [stdout] 380 |     fn serialize_id(&mut self, value: &Option<String>) -> Result<()> {
[INFO] [stdout]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fhir-rs` (lib); 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-09-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name fhir_rs --edition=2021 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("axum", "reqwest"))' -C metadata=3d054764f489acca -C extra-filename=-5f698c5c281f1bea --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-ea181d6b18778f92.rmeta --extern fhir_derive=/opt/rustwide/target/debug/deps/libfhir_derive-c60e691ec8e44861.so --extern json_event_parser=/opt/rustwide/target/debug/deps/libjson_event_parser-cbc2f66a84b043cc.rmeta --extern json_pretty=/opt/rustwide/target/debug/deps/libjson_pretty-9948f9a1c2c5535e.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-da2dd3ec9d589c83.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-db7630da0bfaa785.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-9f0412458e8a3a72.rmeta --extern xml=/opt/rustwide/target/debug/deps/libxml-f342e686f2b688a5.rmeta --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "60e3293f73583ec2d41211abaf73eb82f76846206e79842ff459dd5b268db199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60e3293f73583ec2d41211abaf73eb82f76846206e79842ff459dd5b268db199", kill_on_drop: false }`
[INFO] [stdout] 60e3293f73583ec2d41211abaf73eb82f76846206e79842ff459dd5b268db199