[INFO] updating cached repository williewillus/advent_of_code_2017
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/williewillus/advent_of_code_2017
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/williewillus/advent_of_code_2017" "work/ex/beta-1.38-1/sources/1.37.0/gh/williewillus/advent_of_code_2017"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/williewillus/advent_of_code_2017'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/williewillus/advent_of_code_2017" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/williewillus/advent_of_code_2017"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/williewillus/advent_of_code_2017'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] be3e7bb52d75fb1e7372657045e3cd4f6858dfd7
[INFO] sha for GitHub repo williewillus/advent_of_code_2017: be3e7bb52d75fb1e7372657045e3cd4f6858dfd7
[INFO] validating manifest of williewillus/advent_of_code_2017 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 williewillus/advent_of_code_2017 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 williewillus/advent_of_code_2017
[INFO] finished frobbing williewillus/advent_of_code_2017
[INFO] frobbed toml for williewillus/advent_of_code_2017 written to work/ex/beta-1.38-1/sources/1.37.0/gh/williewillus/advent_of_code_2017/Cargo.toml
[INFO] started frobbing williewillus/advent_of_code_2017
[INFO] finished frobbing williewillus/advent_of_code_2017
[INFO] frobbed toml for williewillus/advent_of_code_2017 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/williewillus/advent_of_code_2017/Cargo.toml
[INFO] crate williewillus/advent_of_code_2017 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing williewillus/advent_of_code_2017 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/williewillus/advent_of_code_2017:/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] ce3b9f8792a21b5cadc292270517bc116275bc0ef47655a02ae3baccb67460e6
[INFO] running `"docker" "start" "-a" "ce3b9f8792a21b5cadc292270517bc116275bc0ef47655a02ae3baccb67460e6"`
[INFO] [stderr]    Compiling fixedbitset v0.1.8
[INFO] [stderr]    Compiling enum-set v0.0.7
[INFO] [stderr]    Compiling ordermap v0.3.2
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]    Compiling xattr v0.1.11
[INFO] [stderr]    Compiling filetime v0.1.14
[INFO] [stderr]    Compiling itertools v0.7.4
[INFO] [stderr]    Compiling regex v0.2.3
[INFO] [stderr]    Compiling tar v0.4.14
[INFO] [stderr]    Compiling bzip2 v0.3.2
[INFO] [stderr]    Compiling libpcre-sys v0.2.2
[INFO] [stderr]    Compiling pathfinding v0.6.8
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pathfinding-0.6.8/src/connected_components.rs:106:18
[INFO] [stderr]     |
[INFO] [stderr] 106 |                 .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::Map<_, _>`
[INFO] [stderr]     = help: to disambiguate the method call, write `std::iter::Iterator::flatten(gs.into_iter()
[INFO] [stderr]                             .map(|(i, _)| groups[i].clone()))` 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(gs.into_iter()
[INFO] [stderr]                             .map(|(i, _)| groups[i].clone()))` 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 `pathfinding`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ce3b9f8792a21b5cadc292270517bc116275bc0ef47655a02ae3baccb67460e6"`
[INFO] running `"docker" "rm" "-f" "ce3b9f8792a21b5cadc292270517bc116275bc0ef47655a02ae3baccb67460e6"`
[INFO] [stdout] ce3b9f8792a21b5cadc292270517bc116275bc0ef47655a02ae3baccb67460e6