[INFO] crate service_world 0.1.1 is already in cache
[INFO] extracting crate service_world 0.1.1 into work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/service_world/0.1.1
[INFO] extracting crate service_world 0.1.1 into work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/reg/service_world/0.1.1
[INFO] validating manifest of service_world-0.1.1 on toolchain master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of service_world-0.1.1 on toolchain try#26f8d250bb3c8a85e812cf663c730ef9e0df9315
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing service_world-0.1.1
[INFO] finished frobbing service_world-0.1.1
[INFO] frobbed toml for service_world-0.1.1 written to work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/service_world/0.1.1/Cargo.toml
[INFO] started frobbing service_world-0.1.1
[INFO] finished frobbing service_world-0.1.1
[INFO] frobbed toml for service_world-0.1.1 written to work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/reg/service_world/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr] error: failed to select a version for the requirement `ring = "^0.11.0"`
[INFO] [stderr]   candidate versions found which didn't match: 0.14.1, 0.14.0, 0.13.5, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `cookie v0.9.1`
[INFO] [stderr]     ... which is depended on by `rocket v0.3.6`
[INFO] [stderr]     ... which is depended on by `service_world v0.1.1 (/mnt/big/crater/work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/service_world/0.1.1)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed