[INFO] updating cached repository rdavidso/sheepsheadbot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rdavidso/sheepsheadbot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rdavidso/sheepsheadbot" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/rdavidso/sheepsheadbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/rdavidso/sheepsheadbot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rdavidso/sheepsheadbot" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/rdavidso/sheepsheadbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/rdavidso/sheepsheadbot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0aeca3a32377f0a5f58577cec9a5e420ede0d188
[INFO] sha for GitHub repo rdavidso/sheepsheadbot: 0aeca3a32377f0a5f58577cec9a5e420ede0d188
[INFO] validating manifest of rdavidso/sheepsheadbot on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rdavidso/sheepsheadbot on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rdavidso/sheepsheadbot
[INFO] finished frobbing rdavidso/sheepsheadbot
[INFO] frobbed toml for rdavidso/sheepsheadbot written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/rdavidso/sheepsheadbot/Cargo.toml
[INFO] started frobbing rdavidso/sheepsheadbot
[INFO] finished frobbing rdavidso/sheepsheadbot
[INFO] frobbed toml for rdavidso/sheepsheadbot written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/rdavidso/sheepsheadbot/Cargo.toml
[INFO] crate rdavidso/sheepsheadbot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/rdavidso/sheepsheadbot/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/aatxe/irc.git`
[INFO] [stderr] error: failed to load source for a dependency on `irc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/aatxe/irc.git
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to find branch `master`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   cannot locate local branch 'master'; class=Reference (4); code=NotFound (-3)
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed