[INFO] fetching crate realm_io 0.5.3...
[INFO] testing realm_io-0.5.3 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate realm_io 0.5.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate realm_io 0.5.3
[INFO] finished tweaking crates.io crate realm_io 0.5.3
[INFO] tweaked toml for crates.io crate realm_io 0.5.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate realm_io 0.5.3 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 realm_io 0.5.3 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 53ce3736ef3402a05e1f778bb43ea0cacec3b17131007e3bcce124a10a8e2dda
[INFO] running `Command { std: "docker" "start" "-a" "53ce3736ef3402a05e1f778bb43ea0cacec3b17131007e3bcce124a10a8e2dda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53ce3736ef3402a05e1f778bb43ea0cacec3b17131007e3bcce124a10a8e2dda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53ce3736ef3402a05e1f778bb43ea0cacec3b17131007e3bcce124a10a8e2dda", kill_on_drop: false }`
[INFO] [stdout] 53ce3736ef3402a05e1f778bb43ea0cacec3b17131007e3bcce124a10a8e2dda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 6ca42ee17a4a41777a876eb721892a523e76147f21880a916815a5036e850e1c
[INFO] running `Command { std: "docker" "start" "-a" "6ca42ee17a4a41777a876eb721892a523e76147f21880a916815a5036e850e1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling pin-project-lite v0.2.16
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling realm_io v0.5.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.01s
[INFO] running `Command { std: "docker" "inspect" "6ca42ee17a4a41777a876eb721892a523e76147f21880a916815a5036e850e1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ca42ee17a4a41777a876eb721892a523e76147f21880a916815a5036e850e1c", kill_on_drop: false }`
[INFO] [stdout] 6ca42ee17a4a41777a876eb721892a523e76147f21880a916815a5036e850e1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] cc202d5881c09fe96932a3d9d0cd42db200d589798fe423f1ce2eac3c2d819d3
[INFO] running `Command { std: "docker" "start" "-a" "cc202d5881c09fe96932a3d9d0cd42db200d589798fe423f1ce2eac3c2d819d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling realm_io v0.5.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "cc202d5881c09fe96932a3d9d0cd42db200d589798fe423f1ce2eac3c2d819d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc202d5881c09fe96932a3d9d0cd42db200d589798fe423f1ce2eac3c2d819d3", kill_on_drop: false }`
[INFO] [stdout] cc202d5881c09fe96932a3d9d0cd42db200d589798fe423f1ce2eac3c2d819d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] fc52c817c28e5a0f671817d0b098599f044aac42372b20a335f3984a7d4fe982
[INFO] running `Command { std: "docker" "start" "-a" "fc52c817c28e5a0f671817d0b098599f044aac42372b20a335f3984a7d4fe982", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/realm_io-d46fc31b1a4ca3aa)
[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 realm_io
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:18
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(doc, feature(doc_cfg))]
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 1 previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-09-21-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --color auto --crate-name realm_io --test src/lib.rs --test-run-directory /opt/rustwide/workdir -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern libc=/opt/rustwide/target/debug/deps/liblibc-a033ff8e3a2aed60.rlib --extern realm_io=/opt/rustwide/target/debug/deps/librealm_io-2756b6c53de5bc10.rlib --extern socket2=/opt/rustwide/target/debug/deps/libsocket2-1c541a0c682e6d98.rlib --extern tokio=/opt/rustwide/target/debug/deps/libtokio-82cd0a08fd12b5f7.rlib -C embed-bitcode=no --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("brutal-shutdown", "default", "peek", "statistic"))' --cap-lints=warn --error-format human` (exit status: 1)
[INFO] [stderr] note: test exited abnormally; to see the full output pass --no-capture to the harness.
[INFO] running `Command { std: "docker" "inspect" "fc52c817c28e5a0f671817d0b098599f044aac42372b20a335f3984a7d4fe982", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc52c817c28e5a0f671817d0b098599f044aac42372b20a335f3984a7d4fe982", kill_on_drop: false }`
[INFO] [stdout] fc52c817c28e5a0f671817d0b098599f044aac42372b20a335f3984a7d4fe982