[INFO] updating cached repository blinry/minitools
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/blinry/minitools
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/blinry/minitools" "work/ex/beta-1.38-1/sources/1.37.0/gh/blinry/minitools"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/blinry/minitools'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/blinry/minitools" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blinry/minitools"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blinry/minitools'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e58ad49382493e250baa41a13721ece694cfc3a4
[INFO] sha for GitHub repo blinry/minitools: e58ad49382493e250baa41a13721ece694cfc3a4
[INFO] validating manifest of blinry/minitools 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 blinry/minitools 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 blinry/minitools
[INFO] finished frobbing blinry/minitools
[INFO] frobbed toml for blinry/minitools written to work/ex/beta-1.38-1/sources/1.37.0/gh/blinry/minitools/Cargo.toml
[INFO] started frobbing blinry/minitools
[INFO] finished frobbing blinry/minitools
[INFO] frobbed toml for blinry/minitools written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blinry/minitools/Cargo.toml
[INFO] crate blinry/minitools 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing blinry/minitools 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/blinry/minitools:/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] 0f2accc7c07b3566fe78df11210c336962fea37ec246f4ec2818d2e7ad0046f0
[INFO] running `"docker" "start" "-a" "0f2accc7c07b3566fe78df11210c336962fea37ec246f4ec2818d2e7ad0046f0"`
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling tempfile v3.0.7
[INFO] [stderr]    Compiling rustyline v3.0.0
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustyline-3.0.0/src/lib.rs:655:43
[INFO] [stderr]     |
[INFO] [stderr] 655 |             editor.add_history_entry(line.as_ref());
[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 E0283`.
[INFO] [stderr] error: Could not compile `rustyline`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0f2accc7c07b3566fe78df11210c336962fea37ec246f4ec2818d2e7ad0046f0"`
[INFO] running `"docker" "rm" "-f" "0f2accc7c07b3566fe78df11210c336962fea37ec246f4ec2818d2e7ad0046f0"`
[INFO] [stdout] 0f2accc7c07b3566fe78df11210c336962fea37ec246f4ec2818d2e7ad0046f0