[INFO] cloning repository https://github.com/Dylan-DPC/cargo-stabilize
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Dylan-DPC/cargo-stabilize" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDylan-DPC%2Fcargo-stabilize", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDylan-DPC%2Fcargo-stabilize'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33f6bc0d22f9d2c5f4f7ca3633f0a0090c769633
[INFO] checking Dylan-DPC/cargo-stabilize against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDylan-DPC%2Fcargo-stabilize" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Dylan-DPC/cargo-stabilize on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Dylan-DPC/cargo-stabilize
[INFO] finished tweaking git repo https://github.com/Dylan-DPC/cargo-stabilize
[INFO] tweaked toml for git repo https://github.com/Dylan-DPC/cargo-stabilize written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Dylan-DPC/cargo-stabilize already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cb05078e53ed33a930032c38b4f38387deadd222bc727e46827ec4c16c8dc060
[INFO] running `Command { std: "docker" "start" "-a" "cb05078e53ed33a930032c38b4f38387deadd222bc727e46827ec4c16c8dc060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb05078e53ed33a930032c38b4f38387deadd222bc727e46827ec4c16c8dc060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb05078e53ed33a930032c38b4f38387deadd222bc727e46827ec4c16c8dc060", kill_on_drop: false }`
[INFO] [stdout] cb05078e53ed33a930032c38b4f38387deadd222bc727e46827ec4c16c8dc060
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcf8c6fae5e0c1bb0b59d2cca59fde7ebdbb67661e992364952b240b048a35ca
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bcf8c6fae5e0c1bb0b59d2cca59fde7ebdbb67661e992364952b240b048a35ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling clap_derive v0.3.0 (https://github.com/clap-rs/clap_derive#2622165b)
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-1.3.1/src/lib.rs:617:34
[INFO] [stdout]     |
[INFO] [stdout] 617 | #![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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bcf8c6fae5e0c1bb0b59d2cca59fde7ebdbb67661e992364952b240b048a35ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcf8c6fae5e0c1bb0b59d2cca59fde7ebdbb67661e992364952b240b048a35ca", kill_on_drop: false }`
[INFO] [stdout] bcf8c6fae5e0c1bb0b59d2cca59fde7ebdbb67661e992364952b240b048a35ca