[INFO] updating cached repository ijanos/euler-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ijanos/euler-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ijanos/euler-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/ijanos/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ijanos/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ijanos/euler-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ijanos/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ijanos/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 64e830a51ebc5da9eda9ec618b0918c3ec208d34
[INFO] sha for GitHub repo ijanos/euler-rust: 64e830a51ebc5da9eda9ec618b0918c3ec208d34
[INFO] validating manifest of ijanos/euler-rust 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 ijanos/euler-rust 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 ijanos/euler-rust
[INFO] finished frobbing ijanos/euler-rust
[INFO] frobbed toml for ijanos/euler-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/ijanos/euler-rust/Cargo.toml
[INFO] started frobbing ijanos/euler-rust
[INFO] finished frobbing ijanos/euler-rust
[INFO] frobbed toml for ijanos/euler-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ijanos/euler-rust/Cargo.toml
[INFO] crate ijanos/euler-rust 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 ijanos/euler-rust 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-6/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/ijanos/euler-rust:/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] 4bd8947a7a47c4e61223d16a5d8e5f3b058035ecb82bf7ce7bf84d8fe7cb3b03
[INFO] running `"docker" "start" "-a" "4bd8947a7a47c4e61223d16a5d8e5f3b058035ecb82bf7ce7bf84d8fe7cb3b03"`
[INFO] [stderr]    Compiling permutohedron v0.2.2
[INFO] [stderr]    Compiling num-complex v0.1.35
[INFO] [stderr]    Compiling num-bigint v0.1.35
[INFO] [stderr]    Compiling num-rational v0.1.35
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling euler-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `zero_prefixed_literal`
[INFO] [stderr]  --> src/euler11.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[allow(zero_prefixed_literal)]
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]   --> src/euler49.rs:27:19
[INFO] [stderr]    |
[INFO] [stderr] 27 |                  .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::iter::Filter<_, _>`
[INFO] [stderr]    = help: to disambiguate the method call, write `std::iter::Iterator::flatten(v.iter()
[INFO] [stderr]                             .combinations_n(3)
[INFO] [stderr]                             .filter(|c| is_seq(c)))` 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(v.iter()
[INFO] [stderr]                             .combinations_n(3)
[INFO] [stderr]                             .filter(|c| is_seq(c)))` 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 `euler-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4bd8947a7a47c4e61223d16a5d8e5f3b058035ecb82bf7ce7bf84d8fe7cb3b03"`
[INFO] running `"docker" "rm" "-f" "4bd8947a7a47c4e61223d16a5d8e5f3b058035ecb82bf7ce7bf84d8fe7cb3b03"`
[INFO] [stdout] 4bd8947a7a47c4e61223d16a5d8e5f3b058035ecb82bf7ce7bf84d8fe7cb3b03