[INFO] updating cached repository subliun/tox-dicebot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/subliun/tox-dicebot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/subliun/tox-dicebot" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/subliun/tox-dicebot"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/subliun/tox-dicebot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/subliun/tox-dicebot" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/subliun/tox-dicebot"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/subliun/tox-dicebot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7501f302a7b28417ead472dd4d025e8206e02f41
[INFO] sha for GitHub repo subliun/tox-dicebot: 7501f302a7b28417ead472dd4d025e8206e02f41
[INFO] validating manifest of subliun/tox-dicebot on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of subliun/tox-dicebot on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing subliun/tox-dicebot
[INFO] finished frobbing subliun/tox-dicebot
[INFO] frobbed toml for subliun/tox-dicebot written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/subliun/tox-dicebot/Cargo.toml
[INFO] started frobbing subliun/tox-dicebot
[INFO] finished frobbing subliun/tox-dicebot
[INFO] frobbed toml for subliun/tox-dicebot written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/subliun/tox-dicebot/Cargo.toml
[INFO] crate subliun/tox-dicebot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/subliun/tox-dicebot/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/aatxe/markov.git`
[INFO] [stderr] error: failed to load source for a dependency on `markov`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/aatxe/markov.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/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed