[INFO] fetching crate json-write 0.0.2...
[INFO] testing json-write-0.0.2 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate json-write 0.0.2 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate json-write 0.0.2
[INFO] finished tweaking crates.io crate json-write 0.0.2
[INFO] tweaked toml for crates.io crate json-write 0.0.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate json-write 0.0.2 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] crate crates.io crate json-write 0.0.2 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 5e38776fdfa0cbf1f329919d16c43f893189f208d9eb751560f6d0961375315e
[INFO] running `Command { std: "docker" "start" "-a" "5e38776fdfa0cbf1f329919d16c43f893189f208d9eb751560f6d0961375315e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e38776fdfa0cbf1f329919d16c43f893189f208d9eb751560f6d0961375315e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e38776fdfa0cbf1f329919d16c43f893189f208d9eb751560f6d0961375315e", kill_on_drop: false }`
[INFO] [stdout] 5e38776fdfa0cbf1f329919d16c43f893189f208d9eb751560f6d0961375315e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a6c5d5fa30c6d66c2ed79298703b07d6eadc7a06fedbd78c071f0605b2b9f085
[INFO] running `Command { std: "docker" "start" "-a" "a6c5d5fa30c6d66c2ed79298703b07d6eadc7a06fedbd78c071f0605b2b9f085", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-write v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "a6c5d5fa30c6d66c2ed79298703b07d6eadc7a06fedbd78c071f0605b2b9f085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6c5d5fa30c6d66c2ed79298703b07d6eadc7a06fedbd78c071f0605b2b9f085", kill_on_drop: false }`
[INFO] [stdout] a6c5d5fa30c6d66c2ed79298703b07d6eadc7a06fedbd78c071f0605b2b9f085
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a8e9550578ec75361ee0d75a312117fcbdeae3b19f7a2f703651e4575f3dc719
[INFO] running `Command { std: "docker" "start" "-a" "a8e9550578ec75361ee0d75a312117fcbdeae3b19f7a2f703651e4575f3dc719", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling rustix v1.0.8
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling linux-raw-sys v0.9.4
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling bitflags v2.9.1
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling anstyle-parse v0.2.0
[INFO] [stderr]    Compiling anstyle-query v1.0.0
[INFO] [stderr]    Compiling colorchoice v1.0.0
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling wait-timeout v0.2.1
[INFO] [stderr]    Compiling bit-vec v0.8.0
[INFO] [stderr]    Compiling anstream v0.6.11
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling rand_xorshift v0.4.0
[INFO] [stderr]    Compiling rand v0.9.1
[INFO] [stderr]    Compiling bit-set v0.8.0
[INFO] [stderr]    Compiling snapbox-macros v0.3.10
[INFO] [stderr]    Compiling unarray v0.1.4
[INFO] [stderr]    Compiling similar v2.2.1
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling ryu v1.0.13
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling snapbox v0.6.21
[INFO] [stderr]    Compiling tempfile v3.20.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling proptest v1.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling serde_json v1.0.142
[INFO] [stderr]    Compiling json-write v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 26.97s
[INFO] running `Command { std: "docker" "inspect" "a8e9550578ec75361ee0d75a312117fcbdeae3b19f7a2f703651e4575f3dc719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8e9550578ec75361ee0d75a312117fcbdeae3b19f7a2f703651e4575f3dc719", kill_on_drop: false }`
[INFO] [stdout] a8e9550578ec75361ee0d75a312117fcbdeae3b19f7a2f703651e4575f3dc719
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] c97e6109e4df483655e7f8ed067f599c2a8a492186a31b15ae28d0c8bcb8f172
[INFO] running `Command { std: "docker" "start" "-a" "c97e6109e4df483655e7f8ed067f599c2a8a492186a31b15ae28d0c8bcb8f172", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/json_write-a84ab1bec7cf4ac6)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests json_write
[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] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/write.rs - write::JsonWrite::value (line 35) ... ok
[INFO] [stdout] test src/lib.rs - (line 5) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.33s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c97e6109e4df483655e7f8ed067f599c2a8a492186a31b15ae28d0c8bcb8f172", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c97e6109e4df483655e7f8ed067f599c2a8a492186a31b15ae28d0c8bcb8f172", kill_on_drop: false }`
[INFO] [stdout] c97e6109e4df483655e7f8ed067f599c2a8a492186a31b15ae28d0c8bcb8f172