[INFO] fetching crate rockscrew 0.2.1...
[INFO] testing rockscrew-0.2.1 against 1.95.0 for beta-1.96-2
[INFO] extracting crate rockscrew 0.2.1 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate rockscrew 0.2.1
[INFO] finished tweaking crates.io crate rockscrew 0.2.1
[INFO] tweaked toml for crates.io crate rockscrew 0.2.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rockscrew 0.2.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rockscrew 0.2.1 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.92
[INFO] [stderr]   Downloaded compio-tls v0.4.0
[INFO] [stderr]   Downloaded os_pipe v1.2.1
[INFO] [stderr]   Downloaded crossbeam-queue v0.3.11
[INFO] [stderr]   Downloaded pin-project-lite v0.2.15
[INFO] [stderr]   Downloaded proc-macro-crate v3.2.0
[INFO] [stderr]   Downloaded errno v0.3.9
[INFO] [stderr]   Downloaded compio-runtime v0.6.2
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.95
[INFO] [stderr]   Downloaded compio-process v0.3.0
[INFO] [stderr]   Downloaded compio-dispatcher v0.5.0
[INFO] [stderr]   Downloaded compio-macros v0.1.2
[INFO] [stderr]   Downloaded compio-buf v0.5.1
[INFO] [stderr]   Downloaded rustc-hash v2.0.0
[INFO] [stderr]   Downloaded compio v0.13.2
[INFO] [stderr]   Downloaded unicode-ident v1.0.14
[INFO] [stderr]   Downloaded aligned-array v1.0.1
[INFO] [stderr]   Downloaded compio-log v0.1.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.95
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.95
[INFO] [stderr]   Downloaded thiserror-impl v2.0.3
[INFO] [stderr]   Downloaded compio-net v0.6.0
[INFO] [stderr]   Downloaded compio-fs v0.6.0
[INFO] [stderr]   Downloaded either v1.13.0
[INFO] [stderr]   Downloaded tinyvec v1.8.0
[INFO] [stderr]   Downloaded nanorand v0.7.0
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.20
[INFO] [stderr]   Downloaded bitflags v2.6.0
[INFO] [stderr]   Downloaded rustversion v1.0.18
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.95
[INFO] [stderr]   Downloaded zeroize v1.8.1
[INFO] [stderr]   Downloaded log v0.4.22
[INFO] [stderr]   Downloaded bytes v1.8.0
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.95
[INFO] [stderr]   Downloaded async-task v4.7.1
[INFO] [stderr]   Downloaded thiserror v2.0.3
[INFO] [stderr]   Downloaded polling v3.7.4
[INFO] [stderr]   Downloaded socket2 v0.5.7
[INFO] [stderr]   Downloaded js-sys v0.3.72
[INFO] [stderr]   Downloaded compio-quic v0.2.0
[INFO] [stderr]   Downloaded io-uring v0.7.2
[INFO] [stderr]   Downloaded bumpalo v3.16.0
[INFO] [stderr]   Downloaded widestring v1.1.0
[INFO] [stderr]   Downloaded indexmap v2.6.0
[INFO] [stderr]   Downloaded toml_edit v0.22.22
[INFO] [stderr]   Downloaded cc v1.2.1
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.13
[INFO] [stderr]   Downloaded winnow v0.6.20
[INFO] [stderr]   Downloaded quinn-proto v0.11.9
[INFO] [stderr]   Downloaded compio-driver v0.6.1
[INFO] [stderr]   Downloaded rustls-webpki v0.102.8
[INFO] [stderr]   Downloaded httparse v1.9.5
[INFO] [stderr]   Downloaded rustls-pki-types v1.10.0
[INFO] [stderr]   Downloaded compio-io v0.5.0
[INFO] [stderr]   Downloaded rustls v0.23.19
[INFO] [stderr]   Downloaded syn v2.0.89
[INFO] [stderr]   Downloaded quote v1.0.37
[INFO] [stderr]   Downloaded rustix v0.38.41
[INFO] [stderr]   Downloaded compio-signal v0.4.0
[INFO] [stderr]   Downloaded libc v0.2.166
[INFO] [stderr]   Downloaded linux-raw-sys v0.4.14
[INFO] [stderr]   Downloaded ring v0.17.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 038f1d151ec2839e56f95a1bf9db0cacced5efccaf8ca8fb993d91327ee65d8a
[INFO] running `Command { std: "docker" "start" "-a" "038f1d151ec2839e56f95a1bf9db0cacced5efccaf8ca8fb993d91327ee65d8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "038f1d151ec2839e56f95a1bf9db0cacced5efccaf8ca8fb993d91327ee65d8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "038f1d151ec2839e56f95a1bf9db0cacced5efccaf8ca8fb993d91327ee65d8a", kill_on_drop: false }`
[INFO] [stdout] 038f1d151ec2839e56f95a1bf9db0cacced5efccaf8ca8fb993d91327ee65d8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d0aa2de932d6bee7d6e768535b8dd665e555792193b96c6fe2fb425fe30e446
[INFO] running `Command { std: "docker" "start" "-a" "4d0aa2de932d6bee7d6e768535b8dd665e555792193b96c6fe2fb425fe30e446", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling libc v0.2.166
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling pin-project-lite v0.2.15
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling io-uring v0.7.2
[INFO] [stderr]    Compiling tracing-core v0.1.33
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling compio-driver v0.6.1
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling hashbrown v0.15.2
[INFO] [stderr]    Compiling toml_datetime v0.6.8
[INFO] [stderr]    Compiling scoped-tls v1.0.1
[INFO] [stderr]    Compiling async-task v4.7.1
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling winnow v0.6.20
[INFO] [stderr]    Compiling compio-fs v0.6.0
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling httparse v1.9.5
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling compio-log v0.1.0
[INFO] [stderr]    Compiling crossbeam-channel v0.5.13
[INFO] [stderr]    Compiling crossbeam-queue v0.3.11
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling indexmap v2.6.0
[INFO] [stderr]    Compiling syn v2.0.89
[INFO] [stderr]    Compiling compio-buf v0.5.1
[INFO] [stderr]    Compiling socket2 v0.5.7
[INFO] [stderr]    Compiling os_pipe v1.2.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/compio-buf-0.5.1/src/lib.rs:8:40
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![cfg_attr(feature = "allocator_api", feature(allocator_api))]
[INFO] [stdout]   |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compio-buf` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4d0aa2de932d6bee7d6e768535b8dd665e555792193b96c6fe2fb425fe30e446", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d0aa2de932d6bee7d6e768535b8dd665e555792193b96c6fe2fb425fe30e446", kill_on_drop: false }`
[INFO] [stdout] 4d0aa2de932d6bee7d6e768535b8dd665e555792193b96c6fe2fb425fe30e446
