[INFO] updating cached repository shhac/env-gen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shhac/env-gen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shhac/env-gen" "work/ex/beta-1.38-1/sources/1.37.0/gh/shhac/env-gen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/shhac/env-gen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shhac/env-gen" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shhac/env-gen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shhac/env-gen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 043da9bc420448cba3d6b26c62c76d7d2efa9d0e
[INFO] sha for GitHub repo shhac/env-gen: 043da9bc420448cba3d6b26c62c76d7d2efa9d0e
[INFO] validating manifest of shhac/env-gen 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 shhac/env-gen 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 shhac/env-gen
[INFO] finished frobbing shhac/env-gen
[INFO] frobbed toml for shhac/env-gen written to work/ex/beta-1.38-1/sources/1.37.0/gh/shhac/env-gen/Cargo.toml
[INFO] started frobbing shhac/env-gen
[INFO] finished frobbing shhac/env-gen
[INFO] frobbed toml for shhac/env-gen written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shhac/env-gen/Cargo.toml
[INFO] crate shhac/env-gen 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 shhac/env-gen 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/shhac/env-gen:/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] d9618f9462b2da80fbf07f66eede52026a97f1b761732503ea7e133077f5fcea
[INFO] running `"docker" "start" "-a" "d9618f9462b2da80fbf07f66eede52026a97f1b761732503ea7e133077f5fcea"`
[INFO] [stderr]    Compiling yaml-rust v0.4.3
[INFO] [stderr]    Compiling env-gen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `super::question`
[INFO] [stderr]  --> src/ask.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use super::question;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^ no `question` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `super::question`
[INFO] [stderr]  --> src/yaml.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use super::question;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^ no `question` in the root
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around pattern
[INFO] [stderr]   --> src/yaml.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     for (a) in v["answers"] {
[INFO] [stderr]    |         ^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: `&yaml::yaml_rust::Yaml` is not an iterator
[INFO] [stderr]   --> src/yaml.rs:28:17
[INFO] [stderr]    |
[INFO] [stderr] 28 |   for (k, v) in doc {
[INFO] [stderr]    |                 ^^^ `&yaml::yaml_rust::Yaml` is not an iterator
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::iter::Iterator` is not implemented for `&yaml::yaml_rust::Yaml`
[INFO] [stderr]    = note: required by `std::iter::IntoIterator::into_iter`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/yaml.rs:54:25
[INFO] [stderr]    |
[INFO] [stderr] 54 |   return dump_questions(&y);
[INFO] [stderr]    |                         ^^ expected enum `yaml::yaml_rust::Yaml`, found struct `std::vec::Vec`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&yaml::yaml_rust::Yaml`
[INFO] [stderr]               found type `&std::vec::Vec<yaml::yaml_rust::Yaml>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `env-gen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d9618f9462b2da80fbf07f66eede52026a97f1b761732503ea7e133077f5fcea"`
[INFO] running `"docker" "rm" "-f" "d9618f9462b2da80fbf07f66eede52026a97f1b761732503ea7e133077f5fcea"`
[INFO] [stdout] d9618f9462b2da80fbf07f66eede52026a97f1b761732503ea7e133077f5fcea