[INFO] updating cached repository guidao/story
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/guidao/story
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/guidao/story" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guidao/story"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guidao/story'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/guidao/story" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/guidao/story"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/guidao/story'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 39c291f3a3e44e1df792b82865b0c75e80b73ba7
[INFO] sha for GitHub repo guidao/story: 39c291f3a3e44e1df792b82865b0c75e80b73ba7
[INFO] validating manifest of guidao/story 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 guidao/story 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 guidao/story
[INFO] finished frobbing guidao/story
[INFO] frobbed toml for guidao/story written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guidao/story/Cargo.toml
[INFO] started frobbing guidao/story
[INFO] finished frobbing guidao/story
[INFO] frobbed toml for guidao/story written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/guidao/story/Cargo.toml
[INFO] crate guidao/story 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]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `ring = "^0.11.0"`
[INFO] [stderr]   candidate versions found which didn't match: 0.16.7, 0.16.6, 0.16.5, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `cookie v0.9.1`
[INFO] [stderr]     ... which is depended on by `rocket v0.3.9`
[INFO] [stderr]     ... which is depended on by `story v0.1.0 (/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/guidao/story)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed