[INFO] fetching crate iocore 0.110.1...
[INFO] testing iocore-0.110.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate iocore 0.110.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate iocore 0.110.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iocore 0.110.1
[INFO] finished tweaking crates.io crate iocore 0.110.1
[INFO] tweaked toml for crates.io crate iocore 0.110.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sanitation v0.0.0
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0bc18ff5ee79f8e6d460ab0474c28b484158a209182e0e5a469368edb3cdd2d
[INFO] running `Command { std: "docker" "start" "-a" "c0bc18ff5ee79f8e6d460ab0474c28b484158a209182e0e5a469368edb3cdd2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0bc18ff5ee79f8e6d460ab0474c28b484158a209182e0e5a469368edb3cdd2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0bc18ff5ee79f8e6d460ab0474c28b484158a209182e0e5a469368edb3cdd2d", kill_on_drop: false }`
[INFO] [stdout] c0bc18ff5ee79f8e6d460ab0474c28b484158a209182e0e5a469368edb3cdd2d
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d05252fa02288472b3de3478fc385cd1f510947cd2c225deea8c67c0dfed43c1
[INFO] running `Command { std: "docker" "start" "-a" "d05252fa02288472b3de3478fc385cd1f510947cd2c225deea8c67c0dfed43c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling option-ext v0.2.0
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling iana-time-zone v0.1.59
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling sanitation v0.0.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling dirs-sys v0.4.1
[INFO] [stderr]    Compiling dirs v5.0.1
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling os_str_bytes v6.6.1
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling bstr v1.9.0
[INFO] [stderr]    Compiling regex v1.10.2
[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-6f17d22bba15001f/regex-1.10.2/src/lib.rs:1317:42
[INFO] [stdout]      |
[INFO] [stdout] 1317 | #![cfg_attr(feature = "pattern", feature(pattern))]
[INFO] [stdout]      |                                          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regex` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d05252fa02288472b3de3478fc385cd1f510947cd2c225deea8c67c0dfed43c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d05252fa02288472b3de3478fc385cd1f510947cd2c225deea8c67c0dfed43c1", kill_on_drop: false }`
[INFO] [stdout] d05252fa02288472b3de3478fc385cd1f510947cd2c225deea8c67c0dfed43c1
