[INFO] updating cached repository netromdk/carapace.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/netromdk/carapace.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/netromdk/carapace.rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/netromdk/carapace.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/netromdk/carapace.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/netromdk/carapace.rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/netromdk/carapace.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/netromdk/carapace.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 66835641ad8ced3b77de6129a5dbdc3ada44b00a
[INFO] sha for GitHub repo netromdk/carapace.rs: 66835641ad8ced3b77de6129a5dbdc3ada44b00a
[INFO] validating manifest of netromdk/carapace.rs 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 netromdk/carapace.rs 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 netromdk/carapace.rs
[INFO] finished frobbing netromdk/carapace.rs
[INFO] frobbed toml for netromdk/carapace.rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/netromdk/carapace.rs/Cargo.toml
[INFO] started frobbing netromdk/carapace.rs
[INFO] finished frobbing netromdk/carapace.rs
[INFO] frobbed toml for netromdk/carapace.rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/netromdk/carapace.rs/Cargo.toml
[INFO] crate netromdk/carapace.rs 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 netromdk/carapace.rs 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-2/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/netromdk/carapace.rs:/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] 1d98bb9719663f009c65ad53d6135ede5823eddfd397617ae30cb4e1990312a9
[INFO] running `"docker" "start" "-a" "1d98bb9719663f009c65ad53d6135ede5823eddfd397617ae30cb4e1990312a9"`
[INFO] [stderr]    Compiling json v0.11.13
[INFO] [stderr]    Compiling dirs v1.0.4
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling rustyline v2.1.0
[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-2.1.0/src/lib.rs:639:43
[INFO] [stderr]     |
[INFO] [stderr] 639 |             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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1d98bb9719663f009c65ad53d6135ede5823eddfd397617ae30cb4e1990312a9"`
[INFO] running `"docker" "rm" "-f" "1d98bb9719663f009c65ad53d6135ede5823eddfd397617ae30cb4e1990312a9"`
[INFO] [stdout] 1d98bb9719663f009c65ad53d6135ede5823eddfd397617ae30cb4e1990312a9