[INFO] crate sarkara 0.10.0-alpha.4 is already in cache
[INFO] extracting crate sarkara 0.10.0-alpha.4 into work/ex/beta-1.37-6/sources/1.36.0/reg/sarkara/0.10.0-alpha.4
[INFO] extracting crate sarkara 0.10.0-alpha.4 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/sarkara/0.10.0-alpha.4
[INFO] validating manifest of sarkara-0.10.0-alpha.4 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sarkara-0.10.0-alpha.4 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sarkara-0.10.0-alpha.4
[INFO] finished frobbing sarkara-0.10.0-alpha.4
[INFO] frobbed toml for sarkara-0.10.0-alpha.4 written to work/ex/beta-1.37-6/sources/1.36.0/reg/sarkara/0.10.0-alpha.4/Cargo.toml
[INFO] started frobbing sarkara-0.10.0-alpha.4
[INFO] finished frobbing sarkara-0.10.0-alpha.4
[INFO] frobbed toml for sarkara-0.10.0-alpha.4 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/sarkara/0.10.0-alpha.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `subtle = "^0.6"`
[INFO] [stderr]   candidate versions found which didn't match: 2.1.1, 2.1.0, 2.0.0, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `kyber v0.2.0-alpha.2`
[INFO] [stderr]     ... which is depended on by `sarkara v0.10.0-alpha.4 (/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/sarkara/0.10.0-alpha.4)`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: crate sarkara-0.10.0-alpha.4 depends on yanked crates
[ERROR]