[INFO] updating cached repository fest-im/fest
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fest-im/fest
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fest-im/fest" "work/ex/beta-1.38-1/sources/1.37.0/gh/fest-im/fest"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/fest-im/fest'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fest-im/fest" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fest-im/fest"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fest-im/fest'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2744ba1a0a9a91ce75df920058357750b66c36c3
[INFO] sha for GitHub repo fest-im/fest: 2744ba1a0a9a91ce75df920058357750b66c36c3
[INFO] validating manifest of fest-im/fest 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 fest-im/fest 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 fest-im/fest
[INFO] finished frobbing fest-im/fest
[INFO] frobbed toml for fest-im/fest written to work/ex/beta-1.38-1/sources/1.37.0/gh/fest-im/fest/Cargo.toml
[INFO] started frobbing fest-im/fest
[INFO] finished frobbing fest-im/fest
[INFO] frobbed toml for fest-im/fest written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fest-im/fest/Cargo.toml
[INFO] crate fest-im/fest 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/ruma/ruma-events`
[INFO] [stderr] error: failed to resolve patches for `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to load source for a dependency on `ruma-events`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/ruma/ruma-events?branch=synapse-workarounds#95b3a009
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '95b3a0099a3f101226b6d8bc539f29ef994a289a' 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