[INFO] crate imag-counter 0.4.0 is already in cache
[INFO] extracting crate imag-counter 0.4.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/imag-counter/0.4.0
[INFO] extracting crate imag-counter 0.4.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/imag-counter/0.4.0
[INFO] validating manifest of imag-counter-0.4.0 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 imag-counter-0.4.0 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 imag-counter-0.4.0
[INFO] finished frobbing imag-counter-0.4.0
[INFO] frobbed toml for imag-counter-0.4.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/imag-counter/0.4.0/Cargo.toml
[INFO] started frobbing imag-counter-0.4.0
[INFO] finished frobbing imag-counter-0.4.0
[INFO] frobbed toml for imag-counter-0.4.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/imag-counter/0.4.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing imag-counter-0.4.0 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-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/imag-counter/0.4.0:/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] 20d3ef1e1b11b094c62b02f4ddf591d67338d7e7a9ed3705507370deaa21faeb
[INFO] running `"docker" "start" "-a" "20d3ef1e1b11b094c62b02f4ddf591d67338d7e7a9ed3705507370deaa21faeb"`
[INFO] [stderr]    Compiling handlebars v0.29.1
[INFO] [stderr]    Compiling libimagcounter v0.4.0
[INFO] [stderr]    Compiling libimagrt v0.4.0
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/libimagrt-0.4.0/src/configuration.rs:270:10
[INFO] [stderr]     |
[INFO] [stderr] 270 |         .flatten()
[INFO] [stderr]     |          ^^^^^^^ multiple `flatten` found
[INFO] [stderr]     |
[INFO] [stderr]     = note: candidate #1 is defined in an impl of the trait `std::iter::Iterator` for the type `std::slice::Iter<'_, _>`
[INFO] [stderr]     = help: to disambiguate the method call, write `std::iter::Iterator::flatten(vec![
[INFO] [stderr]                     vec![searchpath.clone()],
[INFO] [stderr]                     gen_vars(searchpath.clone(), variants.clone(), &modifier),
[INFO] [stderr]             
[INFO] [stderr]                     env::var("HOME").map(|home| gen_vars(PathBuf::from(home), variants.clone(), &modifier))
[INFO] [stderr]                                     .unwrap_or(vec![]),
[INFO] [stderr]             
[INFO] [stderr]                     xdg_basedir::get_data_home().map(|data_dir| gen_vars(data_dir, variants.clone(), &modifier))
[INFO] [stderr]                                                 .unwrap_or(vec![]),
[INFO] [stderr]                 ].iter())` instead
[INFO] [stderr]     = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `_`
[INFO] [stderr]     = help: to disambiguate the method call, write `itertools::Itertools::flatten(vec![
[INFO] [stderr]                     vec![searchpath.clone()],
[INFO] [stderr]                     gen_vars(searchpath.clone(), variants.clone(), &modifier),
[INFO] [stderr]             
[INFO] [stderr]                     env::var("HOME").map(|home| gen_vars(PathBuf::from(home), variants.clone(), &modifier))
[INFO] [stderr]                                     .unwrap_or(vec![]),
[INFO] [stderr]             
[INFO] [stderr]                     xdg_basedir::get_data_home().map(|data_dir| gen_vars(data_dir, variants.clone(), &modifier))
[INFO] [stderr]                                                 .unwrap_or(vec![]),
[INFO] [stderr]                 ].iter())` instead
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0034`.
[INFO] [stderr] error: Could not compile `libimagrt`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "20d3ef1e1b11b094c62b02f4ddf591d67338d7e7a9ed3705507370deaa21faeb"`
[INFO] running `"docker" "rm" "-f" "20d3ef1e1b11b094c62b02f4ddf591d67338d7e7a9ed3705507370deaa21faeb"`
[INFO] [stdout] 20d3ef1e1b11b094c62b02f4ddf591d67338d7e7a9ed3705507370deaa21faeb