[INFO] fetching crate multibuffer 0.1.0...
[INFO] testing multibuffer-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate multibuffer 0.1.0 into /workspace/builds/worker-6-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-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate multibuffer 0.1.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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-2025-10-28" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f10884baad79c1cd9c6ff8c1ab1fd7ec8e7d4488f827462ad2315585178a0fa3
[INFO] running `Command { std: "docker" "start" "-a" "f10884baad79c1cd9c6ff8c1ab1fd7ec8e7d4488f827462ad2315585178a0fa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f10884baad79c1cd9c6ff8c1ab1fd7ec8e7d4488f827462ad2315585178a0fa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f10884baad79c1cd9c6ff8c1ab1fd7ec8e7d4488f827462ad2315585178a0fa3", kill_on_drop: false }`
[INFO] [stdout] f10884baad79c1cd9c6ff8c1ab1fd7ec8e7d4488f827462ad2315585178a0fa3
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85d20ab3bb575f24029c9983247cdbce1f45f5c7836b7ff9e028ef0aa26612ae
[INFO] running `Command { std: "docker" "start" "-a" "85d20ab3bb575f24029c9983247cdbce1f45f5c7836b7ff9e028ef0aa26612ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling multibuffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "85d20ab3bb575f24029c9983247cdbce1f45f5c7836b7ff9e028ef0aa26612ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85d20ab3bb575f24029c9983247cdbce1f45f5c7836b7ff9e028ef0aa26612ae", kill_on_drop: false }`
[INFO] [stdout] 85d20ab3bb575f24029c9983247cdbce1f45f5c7836b7ff9e028ef0aa26612ae
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4e37cd7fcb312a79f177863c7beded9155f8fe1b0c68aa6f824415b54b15442
[INFO] running `Command { std: "docker" "start" "-a" "d4e37cd7fcb312a79f177863c7beded9155f8fe1b0c68aa6f824415b54b15442", kill_on_drop: false }`
[INFO] [stderr]    Compiling multibuffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "d4e37cd7fcb312a79f177863c7beded9155f8fe1b0c68aa6f824415b54b15442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4e37cd7fcb312a79f177863c7beded9155f8fe1b0c68aa6f824415b54b15442", kill_on_drop: false }`
[INFO] [stdout] d4e37cd7fcb312a79f177863c7beded9155f8fe1b0c68aa6f824415b54b15442
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fc853517598380e188997af39f49c6ec0bbd43ace34df787297cb10491b1f738
[INFO] running `Command { std: "docker" "start" "-a" "fc853517598380e188997af39f49c6ec0bbd43ace34df787297cb10491b1f738", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/multibuffer-4ef5fe92efd7d2be)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_multibuffer ... 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] [stderr]    Doc-tests multibuffer
[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] [stdout] all doctests ran in 0.35s; merged doctests compilation took 0.34s
[INFO] running `Command { std: "docker" "inspect" "fc853517598380e188997af39f49c6ec0bbd43ace34df787297cb10491b1f738", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc853517598380e188997af39f49c6ec0bbd43ace34df787297cb10491b1f738", kill_on_drop: false }`
[INFO] [stdout] fc853517598380e188997af39f49c6ec0bbd43ace34df787297cb10491b1f738