[INFO] cloning repository tiden0614/completable-future-rs
[INFO] running `"git" "clone" "--bare" "git://github.com/tiden0614/completable-future-rs.git" "work/cache/sources/gh/tiden0614/completable-future-rs"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/tiden0614/completable-future-rs'...
[INFO] running `"git" "clone" "work/cache/sources/gh/tiden0614/completable-future-rs" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/tiden0614/completable-future-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/tiden0614/completable-future-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tiden0614/completable-future-rs" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/tiden0614/completable-future-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/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#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tiden0614/completable-future-rs on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-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-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/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-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/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/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/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/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-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/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/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]