[INFO] crate futures-shuttle 0.2.1 is already in cache
[INFO] extracting crate futures-shuttle 0.2.1 into work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/futures-shuttle/0.2.1
[INFO] extracting crate futures-shuttle 0.2.1 into work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/futures-shuttle/0.2.1
[INFO] validating manifest of futures-shuttle-0.2.1 on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of futures-shuttle-0.2.1 on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing futures-shuttle-0.2.1
[INFO] finished frobbing futures-shuttle-0.2.1
[INFO] frobbed toml for futures-shuttle-0.2.1 written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/futures-shuttle/0.2.1/Cargo.toml
[INFO] started frobbing futures-shuttle-0.2.1
[INFO] finished frobbing futures-shuttle-0.2.1
[INFO] frobbed toml for futures-shuttle-0.2.1 written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/futures-shuttle/0.2.1/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr] error: failed to select a version for the requirement `futures = "^0.2.0"`
[INFO] [stderr]   candidate versions found which didn't match: 0.1.27, 0.1.26, 0.1.25, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `futures-shuttle v0.2.1 (/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/futures-shuttle/0.2.1)`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: crate futures-shuttle-0.2.1 depends on yanked crates
[ERROR]