[INFO] updating cached repository tiden0614/completable-future-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tiden0614/completable-future-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tiden0614/completable-future-rs" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tiden0614/completable-future-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tiden0614/completable-future-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tiden0614/completable-future-rs" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tiden0614/completable-future-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tiden0614/completable-future-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1c066b3cc3aa4493ea1ff7e54880be31372631c8
[INFO] sha for GitHub repo tiden0614/completable-future-rs: 1c066b3cc3aa4493ea1ff7e54880be31372631c8
[INFO] validating manifest of tiden0614/completable-future-rs on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tiden0614/completable-future-rs on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tiden0614/completable-future-rs
[INFO] finished frobbing tiden0614/completable-future-rs
[INFO] frobbed toml for tiden0614/completable-future-rs written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tiden0614/completable-future-rs/Cargo.toml
[INFO] started frobbing tiden0614/completable-future-rs
[INFO] finished frobbing tiden0614/completable-future-rs
[INFO] frobbed toml for tiden0614/completable-future-rs written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tiden0614/completable-future-rs/Cargo.toml
[INFO] crate tiden0614/completable-future-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tiden0614/completable-future-rs/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `futures = "^0.2.1"`
[INFO] [stderr]   candidate versions found which didn't match: 0.1.28, 0.1.27, 0.1.26, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `completable_future v0.2.0 (/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tiden0614/completable-future-rs)`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: crate tiden0614/completable-future-rs depends on yanked crates
[ERROR]