[INFO] fetching crate sync_cow 0.1.1...
[INFO] testing sync_cow-0.1.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate sync_cow 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate sync_cow 0.1.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate sync_cow 0.1.1
[INFO] tweaked toml for crates.io crate sync_cow 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sync_cow 0.1.1 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 sync_cow 0.1.1 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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d152b57ad6a79fb07541b7818a43a521cab45baddad950c7447526aae9c87631
[INFO] running `Command { std: "docker" "start" "-a" "d152b57ad6a79fb07541b7818a43a521cab45baddad950c7447526aae9c87631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d152b57ad6a79fb07541b7818a43a521cab45baddad950c7447526aae9c87631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d152b57ad6a79fb07541b7818a43a521cab45baddad950c7447526aae9c87631", kill_on_drop: false }`
[INFO] [stdout] d152b57ad6a79fb07541b7818a43a521cab45baddad950c7447526aae9c87631
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b39a3b2ea8473c4ae325a68d31a0e75d4a1651eb2469b3d6fcfd8e3dceccb1c9
[INFO] running `Command { std: "docker" "start" "-a" "b39a3b2ea8473c4ae325a68d31a0e75d4a1651eb2469b3d6fcfd8e3dceccb1c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling sync_cow v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "b39a3b2ea8473c4ae325a68d31a0e75d4a1651eb2469b3d6fcfd8e3dceccb1c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b39a3b2ea8473c4ae325a68d31a0e75d4a1651eb2469b3d6fcfd8e3dceccb1c9", kill_on_drop: false }`
[INFO] [stdout] b39a3b2ea8473c4ae325a68d31a0e75d4a1651eb2469b3d6fcfd8e3dceccb1c9
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cac92d4e8ac9a14de2a02e3ddff987f76635eaec8279cabc42686d0663714bcf
[INFO] running `Command { std: "docker" "start" "-a" "cac92d4e8ac9a14de2a02e3ddff987f76635eaec8279cabc42686d0663714bcf", kill_on_drop: false }`
[INFO] [stderr]    Compiling sync_cow v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "cac92d4e8ac9a14de2a02e3ddff987f76635eaec8279cabc42686d0663714bcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cac92d4e8ac9a14de2a02e3ddff987f76635eaec8279cabc42686d0663714bcf", kill_on_drop: false }`
[INFO] [stdout] cac92d4e8ac9a14de2a02e3ddff987f76635eaec8279cabc42686d0663714bcf
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 05b9ce9d2712cef1238e3ea8f63c0fcec98b33476bd6a602c6cf2fb69631cb09
[INFO] running `Command { std: "docker" "start" "-a" "05b9ce9d2712cef1238e3ea8f63c0fcec98b33476bd6a602c6cf2fb69631cb09", 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/sync_cow-c0171f764fe2d4eb)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::cow_faster_than_rwlock_nosleep ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.95s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sync_cow
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - SyncCow<T>::edit (line 50) ... ok
[INFO] [stdout] test src/lib.rs - SyncCow<T>::read (line 104) ... ok
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.22s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "05b9ce9d2712cef1238e3ea8f63c0fcec98b33476bd6a602c6cf2fb69631cb09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05b9ce9d2712cef1238e3ea8f63c0fcec98b33476bd6a602c6cf2fb69631cb09", kill_on_drop: false }`
[INFO] [stdout] 05b9ce9d2712cef1238e3ea8f63c0fcec98b33476bd6a602c6cf2fb69631cb09