[INFO] fetching crate greprf 0.1.0...
[INFO] testing greprf-0.1.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate greprf 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate greprf 0.1.0 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 greprf 0.1.0
[INFO] finished tweaking crates.io crate greprf 0.1.0
[INFO] tweaked toml for crates.io crate greprf 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate greprf 0.1.0 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustix v0.38.15
[INFO] [stderr]   Downloaded linux-raw-sys v0.4.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ac6dacd25e25536604176dc172d4a332f27a27a18686334a3b369e5286e1a8f7
[INFO] running `Command { std: "docker" "start" "-a" "ac6dacd25e25536604176dc172d4a332f27a27a18686334a3b369e5286e1a8f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac6dacd25e25536604176dc172d4a332f27a27a18686334a3b369e5286e1a8f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac6dacd25e25536604176dc172d4a332f27a27a18686334a3b369e5286e1a8f7", kill_on_drop: false }`
[INFO] [stdout] ac6dacd25e25536604176dc172d4a332f27a27a18686334a3b369e5286e1a8f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b5ccdc2361ed84c90126a5a8aba31e818fc6fb81d589d5411d79c8a56fb330dd
[INFO] running `Command { std: "docker" "start" "-a" "b5ccdc2361ed84c90126a5a8aba31e818fc6fb81d589d5411d79c8a56fb330dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling rustix v0.38.15
[INFO] [stderr]    Compiling unicase v2.7.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.8
[INFO] [stderr]    Compiling bitflags v2.4.0
[INFO] [stderr]    Compiling anstyle-query v1.0.0
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling colorchoice v1.0.0
[INFO] [stderr]    Compiling anstyle v1.0.4
[INFO] [stderr]    Compiling anstyle-parse v0.2.2
[INFO] [stderr]    Compiling memchr v2.6.3
[INFO] [stderr]    Compiling clap_lex v0.5.1
[INFO] [stderr]    Compiling regex-syntax v0.7.5
[INFO] [stderr]    Compiling const-oid v0.9.5
[INFO] [stderr]    Compiling keccak v0.1.4
[INFO] [stderr]    Compiling base64 v0.21.4
[INFO] [stderr]    Compiling anstream v0.6.4
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling sha3 v0.10.8
[INFO] [stderr]    Compiling aho-corasick v1.1.1
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]    Compiling terminal_size v0.3.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling clap_builder v4.4.6
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex-automata v0.3.9
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]    Compiling regex v1.9.6
[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-1.9.6/src/lib.rs:1307:42
[INFO] [stdout]      |
[INFO] [stdout] 1307 | #![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" "b5ccdc2361ed84c90126a5a8aba31e818fc6fb81d589d5411d79c8a56fb330dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5ccdc2361ed84c90126a5a8aba31e818fc6fb81d589d5411d79c8a56fb330dd", kill_on_drop: false }`
[INFO] [stdout] b5ccdc2361ed84c90126a5a8aba31e818fc6fb81d589d5411d79c8a56fb330dd
