[INFO] updating cached repository mayflower/zvelf
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mayflower/zvelf
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mayflower/zvelf" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mayflower/zvelf"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mayflower/zvelf'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mayflower/zvelf" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mayflower/zvelf"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mayflower/zvelf'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bc9bc71d8364f6d1ef64b810a3278afe53127c8f
[INFO] sha for GitHub repo mayflower/zvelf: bc9bc71d8364f6d1ef64b810a3278afe53127c8f
[INFO] validating manifest of mayflower/zvelf 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 mayflower/zvelf 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 mayflower/zvelf
[INFO] finished frobbing mayflower/zvelf
[INFO] frobbed toml for mayflower/zvelf written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/mayflower/zvelf/Cargo.toml
[INFO] started frobbing mayflower/zvelf
[INFO] finished frobbing mayflower/zvelf
[INFO] frobbed toml for mayflower/zvelf written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/mayflower/zvelf/Cargo.toml
[INFO] crate mayflower/zvelf 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 git repository `https://github.com/mayflower/xmas-elf`
[INFO] [stderr] error: failed to load source for a dependency on `xmas-elf`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/mayflower/xmas-elf?branch=cleanup#035b3629
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '035b36292486f8ade064484e3de7d3b6519e4448' not found; 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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed