[INFO] updating cached repository https://github.com/ijanos/euler-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 64e830a51ebc5da9eda9ec618b0918c3ec208d34
[INFO] checking ijanos/euler-rust against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fijanos%2Feuler-rust" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ijanos/euler-rust on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ijanos/euler-rust
[INFO] finished tweaking git repo https://github.com/ijanos/euler-rust
[INFO] tweaked toml for git repo https://github.com/ijanos/euler-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ijanos/euler-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0742df17119c2b1446638e91466a4e039b097dd6caa3df6ec470f6e9a8db38a4
[INFO] running `"docker" "start" "-a" "0742df17119c2b1446638e91466a4e039b097dd6caa3df6ec470f6e9a8db38a4"`
[INFO] [stderr]     Checking permutohedron v0.2.2
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking num-rational v0.1.35
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking euler-rust v0.1.0 (/opt/rustwide/workdir)
[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] warning: build failed, waiting for other jobs to finish...
[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" "0742df17119c2b1446638e91466a4e039b097dd6caa3df6ec470f6e9a8db38a4"`
[INFO] running `"docker" "rm" "-f" "0742df17119c2b1446638e91466a4e039b097dd6caa3df6ec470f6e9a8db38a4"`
[INFO] [stdout] 0742df17119c2b1446638e91466a4e039b097dd6caa3df6ec470f6e9a8db38a4