[INFO] updating cached repository ereichert/dranger-ffmpeg-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ereichert/dranger-ffmpeg-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ereichert/dranger-ffmpeg-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/ereichert/dranger-ffmpeg-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ereichert/dranger-ffmpeg-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ereichert/dranger-ffmpeg-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ereichert/dranger-ffmpeg-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ereichert/dranger-ffmpeg-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d5942314571efb58f901f9a3d8d10684ae8b13be
[INFO] sha for GitHub repo ereichert/dranger-ffmpeg-rs: d5942314571efb58f901f9a3d8d10684ae8b13be
[INFO] validating manifest of ereichert/dranger-ffmpeg-rs 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 ereichert/dranger-ffmpeg-rs 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 ereichert/dranger-ffmpeg-rs
[INFO] finished frobbing ereichert/dranger-ffmpeg-rs
[INFO] frobbed toml for ereichert/dranger-ffmpeg-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/ereichert/dranger-ffmpeg-rs/Cargo.toml
[INFO] started frobbing ereichert/dranger-ffmpeg-rs
[INFO] finished frobbing ereichert/dranger-ffmpeg-rs
[INFO] frobbed toml for ereichert/dranger-ffmpeg-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ereichert/dranger-ffmpeg-rs/Cargo.toml
[INFO] crate ereichert/dranger-ffmpeg-rs 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]     Updating git repository `https://github.com/trafficland/rust-ffmpeg-sys.git`
[INFO] [stderr] error: failed to load source for a dependency on `ffmpeg-sys`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/trafficland/rust-ffmpeg-sys.git?rev=c944c6370478e887b0cd95ed3968d23bde55d929#c944c637
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec 'c944c6370478e887b0cd95ed3968d23bde55d929' 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