[INFO] updating cached repository brson/featuretest
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/brson/featuretest
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/brson/featuretest" "work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/brson/featuretest"`
[INFO] [stderr] Cloning into 'work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/brson/featuretest'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/brson/featuretest" "work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/brson/featuretest"`
[INFO] [stderr] Cloning into 'work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/brson/featuretest'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 274fb33838a586fe048e03fa0d74168db13c194c
[INFO] sha for GitHub repo brson/featuretest: 274fb33838a586fe048e03fa0d74168db13c194c
[INFO] validating manifest of brson/featuretest on toolchain master#589beb979c0f1a9736e02e578913db88398c3ba5
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of brson/featuretest on toolchain try#42445ded8fd34235a676755cb5d079658ed51f6a
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+42445ded8fd34235a676755cb5d079658ed51f6a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing brson/featuretest
[INFO] removed path dependency a from brson/featuretest
[INFO] removed path dependency b from brson/featuretest
[INFO] removed path dependency c from brson/featuretest
[INFO] removed path dependency d from brson/featuretest
[INFO] finished frobbing brson/featuretest
[INFO] frobbed toml for brson/featuretest written to work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/brson/featuretest/Cargo.toml
[INFO] started frobbing brson/featuretest
[INFO] removed path dependency a from brson/featuretest
[INFO] removed path dependency b from brson/featuretest
[INFO] removed path dependency c from brson/featuretest
[INFO] removed path dependency d from brson/featuretest
[INFO] finished frobbing brson/featuretest
[INFO] frobbed toml for brson/featuretest written to work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/brson/featuretest/Cargo.toml
[INFO] crate brson/featuretest already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: no matching package named `c` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `featuretest v0.1.0 (/mnt/crater-raid/crater/work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/brson/featuretest)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed