[INFO] fetching crate undo_stack 0.2.4...
[INFO] testing undo_stack-0.2.4 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate undo_stack 0.2.4 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate undo_stack 0.2.4
[INFO] finished tweaking crates.io crate undo_stack 0.2.4
[INFO] tweaked toml for crates.io crate undo_stack 0.2.4 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate undo_stack 0.2.4 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1858a4e8e08bd245a8d0f56d2f06d93742223ddf4888faf7ec16f0c6c944e14c
[INFO] running `Command { std: "docker" "start" "-a" "1858a4e8e08bd245a8d0f56d2f06d93742223ddf4888faf7ec16f0c6c944e14c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1858a4e8e08bd245a8d0f56d2f06d93742223ddf4888faf7ec16f0c6c944e14c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1858a4e8e08bd245a8d0f56d2f06d93742223ddf4888faf7ec16f0c6c944e14c", kill_on_drop: false }`
[INFO] [stdout] 1858a4e8e08bd245a8d0f56d2f06d93742223ddf4888faf7ec16f0c6c944e14c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2930c7a38f7bb5467d53516d2d68f6fb4db5d64109aa0909e222ba063b50f076
[INFO] running `Command { std: "docker" "start" "-a" "2930c7a38f7bb5467d53516d2d68f6fb4db5d64109aa0909e222ba063b50f076", kill_on_drop: false }`
[INFO] [stderr]    Compiling undo_stack v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "2930c7a38f7bb5467d53516d2d68f6fb4db5d64109aa0909e222ba063b50f076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2930c7a38f7bb5467d53516d2d68f6fb4db5d64109aa0909e222ba063b50f076", kill_on_drop: false }`
[INFO] [stdout] 2930c7a38f7bb5467d53516d2d68f6fb4db5d64109aa0909e222ba063b50f076
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a974ddd2fe1d256310079ea8803b96abd4b190df7888fa870fb9b1a441285ebb
[INFO] running `Command { std: "docker" "start" "-a" "a974ddd2fe1d256310079ea8803b96abd4b190df7888fa870fb9b1a441285ebb", kill_on_drop: false }`
[INFO] [stderr]    Compiling undo_stack v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "a974ddd2fe1d256310079ea8803b96abd4b190df7888fa870fb9b1a441285ebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a974ddd2fe1d256310079ea8803b96abd4b190df7888fa870fb9b1a441285ebb", kill_on_drop: false }`
[INFO] [stdout] a974ddd2fe1d256310079ea8803b96abd4b190df7888fa870fb9b1a441285ebb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] dadd5e490e7c25992123867642926f37d3a33b527ca392da9561582ae64a59dd
[INFO] running `Command { std: "docker" "start" "-a" "dadd5e490e7c25992123867642926f37d3a33b527ca392da9561582ae64a59dd", 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/undo_stack-51370a7eeed0980d)
[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 undo_stack
[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" "dadd5e490e7c25992123867642926f37d3a33b527ca392da9561582ae64a59dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dadd5e490e7c25992123867642926f37d3a33b527ca392da9561582ae64a59dd", kill_on_drop: false }`
[INFO] [stdout] dadd5e490e7c25992123867642926f37d3a33b527ca392da9561582ae64a59dd