[INFO] updating cached repository TheHitchhiker/cli
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/TheHitchhiker/cli
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/TheHitchhiker/cli" "work/ex/beta-1.38-1/sources/1.37.0/gh/TheHitchhiker/cli"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/TheHitchhiker/cli'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/TheHitchhiker/cli" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TheHitchhiker/cli"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TheHitchhiker/cli'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4bab0c723faaa297940b106d0fcc3872f4b80435
[INFO] sha for GitHub repo TheHitchhiker/cli: 4bab0c723faaa297940b106d0fcc3872f4b80435
[INFO] validating manifest of TheHitchhiker/cli 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 TheHitchhiker/cli 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 TheHitchhiker/cli
[INFO] finished frobbing TheHitchhiker/cli
[INFO] frobbed toml for TheHitchhiker/cli written to work/ex/beta-1.38-1/sources/1.37.0/gh/TheHitchhiker/cli/Cargo.toml
[INFO] started frobbing TheHitchhiker/cli
[INFO] finished frobbing TheHitchhiker/cli
[INFO] frobbed toml for TheHitchhiker/cli written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/TheHitchhiker/cli/Cargo.toml
[INFO] crate TheHitchhiker/cli 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 TheHitchhiker/cli 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-5/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/TheHitchhiker/cli:/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] 376d55ef32b454125b34d181dc655a2ff1449561caae1c33a77c9e661a102892
[INFO] running `"docker" "start" "-a" "376d55ef32b454125b34d181dc655a2ff1449561caae1c33a77c9e661a102892"`
[INFO] [stderr]    Compiling rust-shell v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]   --> src/commands/echo.rs:23:51
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let message: String = params.iter().map(|x| x.as_ref()).collect();
[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 `rust-shell`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "376d55ef32b454125b34d181dc655a2ff1449561caae1c33a77c9e661a102892"`
[INFO] running `"docker" "rm" "-f" "376d55ef32b454125b34d181dc655a2ff1449561caae1c33a77c9e661a102892"`
[INFO] [stdout] 376d55ef32b454125b34d181dc655a2ff1449561caae1c33a77c9e661a102892