[INFO] fetching crate libimagref 0.3.0...
[INFO] extracting crate libimagref 0.3.0 into work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/libimagref/0.3.0
[INFO] extracting crate libimagref 0.3.0 into work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/libimagref/0.3.0
[INFO] validating manifest of libimagref-0.3.0 on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of libimagref-0.3.0 on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing libimagref-0.3.0
[INFO] finished frobbing libimagref-0.3.0
[INFO] frobbed toml for libimagref-0.3.0 written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/libimagref/0.3.0/Cargo.toml
[INFO] started frobbing libimagref-0.3.0
[INFO] finished frobbing libimagref-0.3.0
[INFO] frobbed toml for libimagref-0.3.0 written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/reg/libimagref/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libimagentrylist v0.3.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking libimagref-0.3.0 against master#9f06855064ed06a50c496577b21ca50f92a2e67d for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-3/master#9f06855064ed06a50c496577b21ca50f92a2e67d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/reg/libimagref/0.3.0:/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=forbid" "-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" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9eb273a5a9f8a9e0767ac81aa4b11840a357cafc99f1f98c4e538fe4247130cd
[INFO] running `"docker" "start" "-a" "9eb273a5a9f8a9e0767ac81aa4b11840a357cafc99f1f98c4e538fe4247130cd"`
[INFO] [stderr]     Checking boolinator v2.4.0
[INFO] [stderr]     Checking version v2.0.1
[INFO] [stderr]     Checking libimagerror v0.3.0
[INFO] [stderr]     Checking semver-parser v0.6.2
[INFO] [stderr]     Checking libimagutil v0.3.0
[INFO] [stderr]     Checking semver v0.5.1
[INFO] [stderr]     Checking libimagstore v0.3.0
[INFO] [stderr]     Checking libimagentrylist v0.3.0
[INFO] [stderr]     Checking libimagref v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> src/reference.rs:531:22
[INFO] [stderr]     |
[INFO] [stderr] 531 |                     .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]     = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `_`
[INFO] [stderr] 
[INFO] [stderr] error: unused import: `itertools::Itertools`
[INFO] [stderr]    --> src/reference.rs:493:13
[INFO] [stderr]     |
[INFO] [stderr] 493 |         use itertools::Itertools;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:28:5
[INFO] [stderr]     |
[INFO] [stderr] 28  |     unused_imports,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0034`.
[INFO] [stderr] error: Could not compile `libimagref`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0034]: multiple applicable items in scope
[INFO] [stderr]    --> src/reference.rs:531:22
[INFO] [stderr]     |
[INFO] [stderr] 531 |                     .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]     = note: candidate #2 is defined in an impl of the trait `itertools::Itertools` for the type `_`
[INFO] [stderr] 
[INFO] [stderr] error: unused import: `itertools::Itertools`
[INFO] [stderr]    --> src/reference.rs:493:13
[INFO] [stderr]     |
[INFO] [stderr] 493 |         use itertools::Itertools;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:28:5
[INFO] [stderr]     |
[INFO] [stderr] 28  |     unused_imports,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0034`.
[INFO] [stderr] error: Could not compile `libimagref`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9eb273a5a9f8a9e0767ac81aa4b11840a357cafc99f1f98c4e538fe4247130cd"`
[INFO] running `"docker" "rm" "-f" "9eb273a5a9f8a9e0767ac81aa4b11840a357cafc99f1f98c4e538fe4247130cd"`
[INFO] [stdout] 9eb273a5a9f8a9e0767ac81aa4b11840a357cafc99f1f98c4e538fe4247130cd