[INFO] updating cached repository shade/jothello
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shade/jothello
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shade/jothello" "work/ex/beta-1.38-1/sources/1.37.0/gh/shade/jothello"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/shade/jothello'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shade/jothello" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shade/jothello"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shade/jothello'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f43fe14411cce8d0405d6a490dd3afe277f01851
[INFO] sha for GitHub repo shade/jothello: f43fe14411cce8d0405d6a490dd3afe277f01851
[INFO] validating manifest of shade/jothello 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 shade/jothello 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 shade/jothello
[INFO] finished frobbing shade/jothello
[INFO] frobbed toml for shade/jothello written to work/ex/beta-1.38-1/sources/1.37.0/gh/shade/jothello/Cargo.toml
[INFO] started frobbing shade/jothello
[INFO] finished frobbing shade/jothello
[INFO] frobbed toml for shade/jothello written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shade/jothello/Cargo.toml
[INFO] crate shade/jothello 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 shade/jothello 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/shade/jothello:/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] a2326ab2cd940a0c1c5e7b93e0d24a38d6cc9b9c7af3c0453c0153ef44a5cafe
[INFO] running `"docker" "start" "-a" "a2326ab2cd940a0c1c5e7b93e0d24a38d6cc9b9c7af3c0453c0153ef44a5cafe"`
[INFO] [stderr]    Compiling jothello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0277]: `{float}` is not an iterator
[INFO] [stderr]   --> src/build.rs:10:18
[INFO] [stderr]    |
[INFO] [stderr] 10 |     for black in 0.8 {
[INFO] [stderr]    |                  ^^^ `{float}` is not an iterator
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::iter::Iterator` is not implemented for `{float}`
[INFO] [stderr]    = note: required by `std::iter::IntoIterator::into_iter`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `jothello`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a2326ab2cd940a0c1c5e7b93e0d24a38d6cc9b9c7af3c0453c0153ef44a5cafe"`
[INFO] running `"docker" "rm" "-f" "a2326ab2cd940a0c1c5e7b93e0d24a38d6cc9b9c7af3c0453c0153ef44a5cafe"`
[INFO] [stdout] a2326ab2cd940a0c1c5e7b93e0d24a38d6cc9b9c7af3c0453c0153ef44a5cafe