[INFO] fetching crate tracing-browser-subscriber 0.2.0...
[INFO] testing tracing-browser-subscriber-0.2.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate tracing-browser-subscriber 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate tracing-browser-subscriber 0.2.0
[INFO] finished tweaking crates.io crate tracing-browser-subscriber 0.2.0
[INFO] tweaked toml for crates.io crate tracing-browser-subscriber 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tracing-browser-subscriber 0.2.0 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 50 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] b9d5c4537abd1b6f607e5bdc4b8bf0d705f9edd054bbafa2ba70e359934cb8d3
[INFO] running `Command { std: "docker" "start" "-a" "b9d5c4537abd1b6f607e5bdc4b8bf0d705f9edd054bbafa2ba70e359934cb8d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9d5c4537abd1b6f607e5bdc4b8bf0d705f9edd054bbafa2ba70e359934cb8d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9d5c4537abd1b6f607e5bdc4b8bf0d705f9edd054bbafa2ba70e359934cb8d3", kill_on_drop: false }`
[INFO] [stdout] b9d5c4537abd1b6f607e5bdc4b8bf0d705f9edd054bbafa2ba70e359934cb8d3
[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] abdeb1e2328a174994b34dc8d328230e51ab3cf7e6cad39a793a3bfdb5fb778e
[INFO] running `Command { std: "docker" "start" "-a" "abdeb1e2328a174994b34dc8d328230e51ab3cf7e6cad39a793a3bfdb5fb778e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling tracing-subscriber v0.3.20
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.104
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.54
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.104
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.104
[INFO] [stderr]    Compiling wasm-bindgen v0.2.104
[INFO] [stderr]    Compiling js-sys v0.3.81
[INFO] [stderr]    Compiling wasm-bindgen-futures v0.4.54
[INFO] [stderr]    Compiling wasm-bindgen-test v0.3.54
[INFO] [stderr]    Compiling tracing-browser-subscriber v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.93s
[INFO] running `Command { std: "docker" "inspect" "abdeb1e2328a174994b34dc8d328230e51ab3cf7e6cad39a793a3bfdb5fb778e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abdeb1e2328a174994b34dc8d328230e51ab3cf7e6cad39a793a3bfdb5fb778e", kill_on_drop: false }`
[INFO] [stdout] abdeb1e2328a174994b34dc8d328230e51ab3cf7e6cad39a793a3bfdb5fb778e
[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] 64fa7f42c93797a1e464240cff6ec15a329d5475a9963230c751d93077f47859
[INFO] running `Command { std: "docker" "start" "-a" "64fa7f42c93797a1e464240cff6ec15a329d5475a9963230c751d93077f47859", kill_on_drop: false }`
[INFO] [stderr]    Compiling tracing-browser-subscriber v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "64fa7f42c93797a1e464240cff6ec15a329d5475a9963230c751d93077f47859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64fa7f42c93797a1e464240cff6ec15a329d5475a9963230c751d93077f47859", kill_on_drop: false }`
[INFO] [stdout] 64fa7f42c93797a1e464240cff6ec15a329d5475a9963230c751d93077f47859
[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", kill_on_drop: false }`
[INFO] [stdout] f906ae49a8ead12e23eb0c01a06b9cf89807a128d528a43125fd77e8a692e48e
[INFO] running `Command { std: "docker" "start" "-a" "f906ae49a8ead12e23eb0c01a06b9cf89807a128d528a43125fd77e8a692e48e", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tracing_browser_subscriber-3ca115e387c02a09)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tracing_browser_subscriber
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f906ae49a8ead12e23eb0c01a06b9cf89807a128d528a43125fd77e8a692e48e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f906ae49a8ead12e23eb0c01a06b9cf89807a128d528a43125fd77e8a692e48e", kill_on_drop: false }`
[INFO] [stdout] f906ae49a8ead12e23eb0c01a06b9cf89807a128d528a43125fd77e8a692e48e