[INFO] updating cached repository kerrickstaley/hsk_flashcards
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kerrickstaley/hsk_flashcards
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kerrickstaley/hsk_flashcards" "work/ex/beta-1.38-1/sources/1.37.0/gh/kerrickstaley/hsk_flashcards"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kerrickstaley/hsk_flashcards'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kerrickstaley/hsk_flashcards" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kerrickstaley/hsk_flashcards"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kerrickstaley/hsk_flashcards'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 980cb2d89fadb6670cade0c3517a0faabfdcdc72
[INFO] sha for GitHub repo kerrickstaley/hsk_flashcards: 980cb2d89fadb6670cade0c3517a0faabfdcdc72
[INFO] validating manifest of kerrickstaley/hsk_flashcards on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kerrickstaley/hsk_flashcards on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kerrickstaley/hsk_flashcards
[INFO] finished frobbing kerrickstaley/hsk_flashcards
[INFO] frobbed toml for kerrickstaley/hsk_flashcards written to work/ex/beta-1.38-1/sources/1.37.0/gh/kerrickstaley/hsk_flashcards/Cargo.toml
[INFO] started frobbing kerrickstaley/hsk_flashcards
[INFO] finished frobbing kerrickstaley/hsk_flashcards
[INFO] frobbed toml for kerrickstaley/hsk_flashcards written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kerrickstaley/hsk_flashcards/Cargo.toml
[INFO] crate kerrickstaley/hsk_flashcards already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kerrickstaley/hsk_flashcards/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing kerrickstaley/hsk_flashcards against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kerrickstaley/hsk_flashcards:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 1a5d61d2a1747b696f9d9bf6df4cd804dcabe65bb5fb043be632c3b264e88af8
[INFO] running `"docker" "start" "-a" "1a5d61d2a1747b696f9d9bf6df4cd804dcabe65bb5fb043be632c3b264e88af8"`
[INFO] [stderr]    Compiling rusqlite v0.0.17
[INFO] [stderr]    Compiling yaml v0.2.1
[INFO] [stderr]    Compiling bitflags v0.1.1
[INFO] [stderr]    Compiling libsqlite3-sys v0.0.13
[INFO] [stderr]    Compiling csv v0.14.7
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr] error[E0463]: can't find crate for `pkg_config`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rusqlite-0.0.17/build.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate pkg_config;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `rusqlite`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-0.1.80/src/lib.rs:451:34
[INFO] [stderr]     |
[INFO] [stderr] 451 | #![cfg_attr(feature = "pattern", feature(pattern))]
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `regex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1a5d61d2a1747b696f9d9bf6df4cd804dcabe65bb5fb043be632c3b264e88af8"`
[INFO] running `"docker" "rm" "-f" "1a5d61d2a1747b696f9d9bf6df4cd804dcabe65bb5fb043be632c3b264e88af8"`
[INFO] [stdout] 1a5d61d2a1747b696f9d9bf6df4cd804dcabe65bb5fb043be632c3b264e88af8