[INFO] updating cached repository Francososa/grep-baby
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Francososa/grep-baby
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Francososa/grep-baby" "work/ex/beta-1.37-6/sources/1.36.0/gh/Francososa/grep-baby"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Francososa/grep-baby'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Francososa/grep-baby" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Francososa/grep-baby"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Francososa/grep-baby'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 45799ec2c0f05909a13056f4a223f4e5ce03ec25
[INFO] sha for GitHub repo Francososa/grep-baby: 45799ec2c0f05909a13056f4a223f4e5ce03ec25
[INFO] validating manifest of Francososa/grep-baby on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Francososa/grep-baby on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Francososa/grep-baby
[INFO] finished frobbing Francososa/grep-baby
[INFO] frobbed toml for Francososa/grep-baby written to work/ex/beta-1.37-6/sources/1.36.0/gh/Francososa/grep-baby/Cargo.toml
[INFO] started frobbing Francososa/grep-baby
[INFO] finished frobbing Francososa/grep-baby
[INFO] frobbed toml for Francososa/grep-baby written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Francososa/grep-baby/Cargo.toml
[INFO] crate Francososa/grep-baby already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Francososa/grep-baby against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Francososa/grep-baby:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 9e3e1334fd8e5c710230be5e4ce2a7defe81868bc9a5c75e99a1f21f21177228
[INFO] running `"docker" "start" "-a" "9e3e1334fd8e5c710230be5e4ce2a7defe81868bc9a5c75e99a1f21f21177228"`
[INFO] [stderr]    Compiling libc v0.2.49
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling grep-baby v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]   --> src/main.rs:44:21
[INFO] [stderr]    |
[INFO] [stderr] 44 |         let stdin = io::stdin();
[INFO] [stderr]    |                     ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0433`.
[INFO] [stderr] error: Could not compile `grep-baby`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9e3e1334fd8e5c710230be5e4ce2a7defe81868bc9a5c75e99a1f21f21177228"`
[INFO] running `"docker" "rm" "-f" "9e3e1334fd8e5c710230be5e4ce2a7defe81868bc9a5c75e99a1f21f21177228"`
[INFO] [stdout] 9e3e1334fd8e5c710230be5e4ce2a7defe81868bc9a5c75e99a1f21f21177228