[INFO] fetching crate natural_sort 0.0.1...
[INFO] testing natural_sort-0.0.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate natural_sort 0.0.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate natural_sort 0.0.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate natural_sort 0.0.1
[INFO] finished tweaking crates.io crate natural_sort 0.0.1
[INFO] tweaked toml for crates.io crate natural_sort 0.0.1 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d3fad1a929d269ca1a19524f16be349179217560b6134bc0b602ad4cde4faa1
[INFO] running `Command { std: "docker" "start" "-a" "3d3fad1a929d269ca1a19524f16be349179217560b6134bc0b602ad4cde4faa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d3fad1a929d269ca1a19524f16be349179217560b6134bc0b602ad4cde4faa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d3fad1a929d269ca1a19524f16be349179217560b6134bc0b602ad4cde4faa1", kill_on_drop: false }`
[INFO] [stdout] 3d3fad1a929d269ca1a19524f16be349179217560b6134bc0b602ad4cde4faa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a533629ffd6a3071c9eb328e9c477086b82fcbcd75069476d77212ee8b673e50
[INFO] running `Command { std: "docker" "start" "-a" "a533629ffd6a3071c9eb328e9c477086b82fcbcd75069476d77212ee8b673e50", kill_on_drop: false }`
[INFO] [stderr]    Compiling natural_sort v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `regex`
[INFO] [stdout]   --> src/lib.rs:38:1
[INFO] [stdout]    |
[INFO] [stdout] 38 | extern crate regex;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `natural_sort` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a533629ffd6a3071c9eb328e9c477086b82fcbcd75069476d77212ee8b673e50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a533629ffd6a3071c9eb328e9c477086b82fcbcd75069476d77212ee8b673e50", kill_on_drop: false }`
[INFO] [stdout] a533629ffd6a3071c9eb328e9c477086b82fcbcd75069476d77212ee8b673e50