[INFO] updating cached repository birkenfeld/greptest
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/birkenfeld/greptest
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/birkenfeld/greptest" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/birkenfeld/greptest"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/birkenfeld/greptest'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/birkenfeld/greptest" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/birkenfeld/greptest"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/birkenfeld/greptest'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0bdbd5efe989197c0f85bc13202c8d5b003d4480
[INFO] sha for GitHub repo birkenfeld/greptest: 0bdbd5efe989197c0f85bc13202c8d5b003d4480
[INFO] validating manifest of birkenfeld/greptest on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of birkenfeld/greptest on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing birkenfeld/greptest
[INFO] finished frobbing birkenfeld/greptest
[INFO] frobbed toml for birkenfeld/greptest written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/birkenfeld/greptest/Cargo.toml
[INFO] started frobbing birkenfeld/greptest
[INFO] finished frobbing birkenfeld/greptest
[INFO] frobbed toml for birkenfeld/greptest written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/birkenfeld/greptest/Cargo.toml
[INFO] crate birkenfeld/greptest already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/birkenfeld/greptest/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang-nursery/regex`
[INFO] [stderr] error: failed to load source for a dependency on `regex`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/rust-lang-nursery/regex?branch=raw-bytes
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to find branch `raw-bytes`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   cannot locate local branch 'raw-bytes'; 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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed