[INFO] updating cached repository florianjacob/dsn-traveller
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/florianjacob/dsn-traveller
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/florianjacob/dsn-traveller" "work/ex/beta-1.38-1/sources/1.37.0/gh/florianjacob/dsn-traveller"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/florianjacob/dsn-traveller'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/florianjacob/dsn-traveller" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/florianjacob/dsn-traveller"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/florianjacob/dsn-traveller'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3276ba984d118e083e1fba8b9a99bfa3387294e0
[INFO] sha for GitHub repo florianjacob/dsn-traveller: 3276ba984d118e083e1fba8b9a99bfa3387294e0
[INFO] validating manifest of florianjacob/dsn-traveller 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 florianjacob/dsn-traveller 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 florianjacob/dsn-traveller
[INFO] removed path dependency matrixgraph from florianjacob/dsn-traveller
[INFO] finished frobbing florianjacob/dsn-traveller
[INFO] frobbed toml for florianjacob/dsn-traveller written to work/ex/beta-1.38-1/sources/1.37.0/gh/florianjacob/dsn-traveller/Cargo.toml
[INFO] started frobbing florianjacob/dsn-traveller
[INFO] removed path dependency matrixgraph from florianjacob/dsn-traveller
[INFO] finished frobbing florianjacob/dsn-traveller
[INFO] frobbed toml for florianjacob/dsn-traveller written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/florianjacob/dsn-traveller/Cargo.toml
[INFO] crate florianjacob/dsn-traveller 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 crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/florianjacob/dsn-traveller/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" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/tokio-rs/tokio`
[INFO] [stderr] error: failed to resolve patches for `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   patch for `tokio-async-await` in `https://github.com/rust-lang/crates.io-index` did not resolve to any crates. If this is unexpected, you may wish to consult: https://github.com/rust-lang/cargo/issues/4678
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed