[INFO] fetching crate tracing_json_span_fields 0.1.1...
[INFO] testing tracing_json_span_fields-0.1.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tracing_json_span_fields 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate tracing_json_span_fields 0.1.1
[INFO] finished tweaking crates.io crate tracing_json_span_fields 0.1.1
[INFO] tweaked toml for crates.io crate tracing_json_span_fields 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tracing_json_span_fields 0.1.1 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 34 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-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0128bd98e4acf85c539c75736b18fa6ac200d82176e27e628c6fe9832d8f91b0
[INFO] running `Command { std: "docker" "start" "-a" "0128bd98e4acf85c539c75736b18fa6ac200d82176e27e628c6fe9832d8f91b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0128bd98e4acf85c539c75736b18fa6ac200d82176e27e628c6fe9832d8f91b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0128bd98e4acf85c539c75736b18fa6ac200d82176e27e628c6fe9832d8f91b0", kill_on_drop: false }`
[INFO] [stdout] 0128bd98e4acf85c539c75736b18fa6ac200d82176e27e628c6fe9832d8f91b0
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6889327d3813587ef58ca94acca0a89bb3b9b2a5ae1f8983bc6a9eb0f5c4cb6f
[INFO] running `Command { std: "docker" "start" "-a" "6889327d3813587ef58ca94acca0a89bb3b9b2a5ae1f8983bc6a9eb0f5c4cb6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling time-core v0.1.8
[INFO] [stderr]    Compiling deranged v0.5.8
[INFO] [stderr]    Compiling num-conv v0.2.1
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling tracing-subscriber v0.3.23
[INFO] [stderr]    Compiling time v0.3.47
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling tracing_json_span_fields v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.09s
[INFO] running `Command { std: "docker" "inspect" "6889327d3813587ef58ca94acca0a89bb3b9b2a5ae1f8983bc6a9eb0f5c4cb6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6889327d3813587ef58ca94acca0a89bb3b9b2a5ae1f8983bc6a9eb0f5c4cb6f", kill_on_drop: false }`
[INFO] [stdout] 6889327d3813587ef58ca94acca0a89bb3b9b2a5ae1f8983bc6a9eb0f5c4cb6f
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d60cbd226ddb28ce786fe38b2916a86c42b70633f25f81246088eeb2c16dc9e7
[INFO] running `Command { std: "docker" "start" "-a" "d60cbd226ddb28ce786fe38b2916a86c42b70633f25f81246088eeb2c16dc9e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling time-macros v0.2.27
[INFO] [stderr]    Compiling time v0.3.47
[INFO] [stderr]    Compiling tracing_json_span_fields v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.79s
[INFO] running `Command { std: "docker" "inspect" "d60cbd226ddb28ce786fe38b2916a86c42b70633f25f81246088eeb2c16dc9e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d60cbd226ddb28ce786fe38b2916a86c42b70633f25f81246088eeb2c16dc9e7", kill_on_drop: false }`
[INFO] [stdout] d60cbd226ddb28ce786fe38b2916a86c42b70633f25f81246088eeb2c16dc9e7
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2fb6fb73105d34a99d5ad0265d4d9a9923b76a1734897544f46893e256e411ee
[INFO] running `Command { std: "docker" "start" "-a" "2fb6fb73105d34a99d5ad0265d4d9a9923b76a1734897544f46893e256e411ee", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tracing_json_span_fields-198fd5e076864126)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test tests::logging_levels ... ok
[INFO] [stdout] test tests::custom_timestamp ... ok
[INFO] [stdout] test tests::logging_levels_off ... ok
[INFO] [stdout] test tests::one_span_recorded_field ... ok
[INFO] [stdout] test tests::one_span_recorded_field_overwriting_initial_field ... ok
[INFO] [stdout] test tests::logging_levels_trace ... ok
[INFO] [stdout] test tests::two_spans_different_fields ... ok
[INFO] [stdout]   [2m2026-04-27T02:16:55.249487Z[0m [32m INFO[0m [1;32mtracing_json_span_fields::tests[0m[32m: [32mBEFORE[0m
[INFO] [stdout]     [2;3mat[0m src/lib.rs:383
[INFO] [stdout] 
[INFO] [stdout]   [2m2026-04-27T02:16:55.249652Z[0m [32m INFO[0m [1;32mtracing_json_span_fields::tests[0m[32m: [32mAFTER[0m
[INFO] [stdout]     [2;3mat[0m src/lib.rs:393
[INFO] [stdout] 
[INFO] [stdout] test tests::two_spans_same_fields ... ok
[INFO] [stdout] test tests::one_span_some_fields ... ok
[INFO] [stdout] test tests::without_any_spans ... ok
[INFO] [stdout] test tests::two_spans_same_fields_including_event ... ok
[INFO] [stdout] test tests::two_events_from_two_spans ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tracing_json_span_fields
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 32) ... ok
[INFO] [stdout] test src/lib.rs - (line 7) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.45s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2fb6fb73105d34a99d5ad0265d4d9a9923b76a1734897544f46893e256e411ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fb6fb73105d34a99d5ad0265d4d9a9923b76a1734897544f46893e256e411ee", kill_on_drop: false }`
[INFO] [stdout] 2fb6fb73105d34a99d5ad0265d4d9a9923b76a1734897544f46893e256e411ee
