[INFO] crate md_grid 0.2.1 is already in cache
[INFO] extracting crate md_grid 0.2.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/md_grid/0.2.1
[INFO] extracting crate md_grid 0.2.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/md_grid/0.2.1
[INFO] validating manifest of md_grid-0.2.1 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 md_grid-0.2.1 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 md_grid-0.2.1
[INFO] removed 2 missing examples
[INFO] finished frobbing md_grid-0.2.1
[INFO] frobbed toml for md_grid-0.2.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/md_grid/0.2.1/Cargo.toml
[INFO] started frobbing md_grid-0.2.1
[INFO] removed 2 missing examples
[INFO] finished frobbing md_grid-0.2.1
[INFO] frobbed toml for md_grid-0.2.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/md_grid/0.2.1/Cargo.toml
[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 md_grid-0.2.1 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/md_grid/0.2.1:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f0f3cb8d3aa2555f5a7cc3b7450125c45472d117d2badfbf84d6fde4dd1b79f6
[INFO] running `"docker" "start" "-a" "f0f3cb8d3aa2555f5a7cc3b7450125c45472d117d2badfbf84d6fde4dd1b79f6"`
[INFO] [stderr]    Compiling md_grid v0.2.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "f0f3cb8d3aa2555f5a7cc3b7450125c45472d117d2badfbf84d6fde4dd1b79f6"`
[INFO] running `"docker" "rm" "-f" "f0f3cb8d3aa2555f5a7cc3b7450125c45472d117d2badfbf84d6fde4dd1b79f6"`
[INFO] [stdout] f0f3cb8d3aa2555f5a7cc3b7450125c45472d117d2badfbf84d6fde4dd1b79f6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/md_grid/0.2.1:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a3c64ac53c63ac64d3b617c6987f2a45c62ff958cabba6038c8323320cbed08e
[INFO] running `"docker" "start" "-a" "a3c64ac53c63ac64d3b617c6987f2a45c62ff958cabba6038c8323320cbed08e"`
[INFO] [stderr]    Compiling md_grid v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `prettytable`
[INFO] [stderr]  --> examples/chessboard.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | extern crate prettytable;
[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 `md_grid`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0463]: can't find crate for `prettytable`
[INFO] [stderr]  --> examples/simple_grid.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | extern crate prettytable;
[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 `md_grid`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a3c64ac53c63ac64d3b617c6987f2a45c62ff958cabba6038c8323320cbed08e"`
[INFO] running `"docker" "rm" "-f" "a3c64ac53c63ac64d3b617c6987f2a45c62ff958cabba6038c8323320cbed08e"`
[INFO] [stdout] a3c64ac53c63ac64d3b617c6987f2a45c62ff958cabba6038c8323320cbed08e