[INFO] fetching crate drone-fatfs-core 0.1.0...
[INFO] extracting crate drone-fatfs-core 0.1.0 into work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/drone-fatfs-core/0.1.0
[INFO] extracting crate drone-fatfs-core 0.1.0 into work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/drone-fatfs-core/0.1.0
[INFO] validating manifest of drone-fatfs-core-0.1.0 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 drone-fatfs-core-0.1.0 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 drone-fatfs-core-0.1.0
[INFO] finished frobbing drone-fatfs-core-0.1.0
[INFO] frobbed toml for drone-fatfs-core-0.1.0 written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/drone-fatfs-core/0.1.0/Cargo.toml
[INFO] started frobbing drone-fatfs-core-0.1.0
[INFO] finished frobbing drone-fatfs-core-0.1.0
[INFO] frobbed toml for drone-fatfs-core-0.1.0 written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/drone-fatfs-core/0.1.0/Cargo.toml
[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"`
[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 `drone-fatfs-core v0.1.0 (/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/drone-fatfs-core/0.1.0)`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: crate drone-fatfs-core-0.1.0 depends on yanked crates
[ERROR]