[INFO] updating cached repository ryanisaacg/ld42
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ryanisaacg/ld42
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ryanisaacg/ld42" "work/ex/beta-1.38-1/sources/1.37.0/gh/ryanisaacg/ld42"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ryanisaacg/ld42'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ryanisaacg/ld42" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ryanisaacg/ld42"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ryanisaacg/ld42'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 65a21aa8ea0aa2f396d88c8d95f94e1e738c9ecd
[INFO] sha for GitHub repo ryanisaacg/ld42: 65a21aa8ea0aa2f396d88c8d95f94e1e738c9ecd
[INFO] validating manifest of ryanisaacg/ld42 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ryanisaacg/ld42 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ryanisaacg/ld42
[INFO] finished frobbing ryanisaacg/ld42
[INFO] frobbed toml for ryanisaacg/ld42 written to work/ex/beta-1.38-1/sources/1.37.0/gh/ryanisaacg/ld42/Cargo.toml
[INFO] started frobbing ryanisaacg/ld42
[INFO] finished frobbing ryanisaacg/ld42
[INFO] frobbed toml for ryanisaacg/ld42 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ryanisaacg/ld42/Cargo.toml
[INFO] crate ryanisaacg/ld42 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/ryanisaacg/quicksilver`
[INFO] [stderr] error: failed to load source for a dependency on `quicksilver`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/ryanisaacg/quicksilver?branch=ludum-dare#85969cb5
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '85969cb566099aa28046d215f1e55a132b9a512f' 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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed