[INFO] fetching crate multibuffer 0.1.0...
[INFO] testing multibuffer-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate multibuffer 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate multibuffer 0.1.0
[INFO] finished tweaking crates.io crate multibuffer 0.1.0
[INFO] tweaked toml for crates.io crate multibuffer 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate multibuffer 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] crate crates.io crate multibuffer 0.1.0 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] fb369d83ea0b4b6d4becbb42a4c837c4ad5803df44e6f6abcae61d6f9db91827
[INFO] running `Command { std: "docker" "start" "-a" "fb369d83ea0b4b6d4becbb42a4c837c4ad5803df44e6f6abcae61d6f9db91827", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb369d83ea0b4b6d4becbb42a4c837c4ad5803df44e6f6abcae61d6f9db91827", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb369d83ea0b4b6d4becbb42a4c837c4ad5803df44e6f6abcae61d6f9db91827", kill_on_drop: false }`
[INFO] [stdout] fb369d83ea0b4b6d4becbb42a4c837c4ad5803df44e6f6abcae61d6f9db91827
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b75e7ae33f0b1968bb41cd027c30bbc1c5607ea24e0994494149ea0f342817a2
[INFO] running `Command { std: "docker" "start" "-a" "b75e7ae33f0b1968bb41cd027c30bbc1c5607ea24e0994494149ea0f342817a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling multibuffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "b75e7ae33f0b1968bb41cd027c30bbc1c5607ea24e0994494149ea0f342817a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b75e7ae33f0b1968bb41cd027c30bbc1c5607ea24e0994494149ea0f342817a2", kill_on_drop: false }`
[INFO] [stdout] b75e7ae33f0b1968bb41cd027c30bbc1c5607ea24e0994494149ea0f342817a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] f442b327aa4472e13480ab9bcf3e2dc7d46c0f98570cec7b416ed1ea297aaac8
[INFO] running `Command { std: "docker" "start" "-a" "f442b327aa4472e13480ab9bcf3e2dc7d46c0f98570cec7b416ed1ea297aaac8", kill_on_drop: false }`
[INFO] [stderr]    Compiling multibuffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "f442b327aa4472e13480ab9bcf3e2dc7d46c0f98570cec7b416ed1ea297aaac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f442b327aa4472e13480ab9bcf3e2dc7d46c0f98570cec7b416ed1ea297aaac8", kill_on_drop: false }`
[INFO] [stdout] f442b327aa4472e13480ab9bcf3e2dc7d46c0f98570cec7b416ed1ea297aaac8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2bb010f369f1f3418ceaaacda72cf8442edf893abe32d2880ff64c53a6cfaa2d
[INFO] running `Command { std: "docker" "start" "-a" "2bb010f369f1f3418ceaaacda72cf8442edf893abe32d2880ff64c53a6cfaa2d", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/multibuffer-4ef5fe92efd7d2be)
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_multibuffer ... ok
[INFO] [stderr]    Doc-tests multibuffer
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 28) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2bb010f369f1f3418ceaaacda72cf8442edf893abe32d2880ff64c53a6cfaa2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb010f369f1f3418ceaaacda72cf8442edf893abe32d2880ff64c53a6cfaa2d", kill_on_drop: false }`
[INFO] [stdout] 2bb010f369f1f3418ceaaacda72cf8442edf893abe32d2880ff64c53a6cfaa2d