[INFO] updating cached repository CPearring/rover-gui
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CPearring/rover-gui
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CPearring/rover-gui" "work/ex/clippy-test-run/sources/stable/gh/CPearring/rover-gui"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/CPearring/rover-gui'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CPearring/rover-gui" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/CPearring/rover-gui"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/CPearring/rover-gui'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2899843c5b60b3f6ce4405fe150ef470e3a20b39
[INFO] sha for GitHub repo CPearring/rover-gui: 2899843c5b60b3f6ce4405fe150ef470e3a20b39
[INFO] validating manifest of CPearring/rover-gui on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CPearring/rover-gui on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing CPearring/rover-gui
[INFO] finished frobbing CPearring/rover-gui
[INFO] frobbed toml for CPearring/rover-gui written to work/ex/clippy-test-run/sources/stable/gh/CPearring/rover-gui/Cargo.toml
[INFO] started frobbing CPearring/rover-gui
[INFO] finished frobbing CPearring/rover-gui
[INFO] frobbed toml for CPearring/rover-gui written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/CPearring/rover-gui/Cargo.toml
[INFO] crate CPearring/rover-gui has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `https://github.com/pistondevelopers/event`
[INFO] [stderr] error: failed to load source for a dependency on `pistoncore-event`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/pistondevelopers/event#c51e721f
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to fetch into /mnt/big/crater/work/local/cargo-home/git/db/event-dedf5ad125ed649a
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to authenticate when downloading repository
[INFO] [stderr] attempted to find username/password via git's `credential.helper` support, but failed
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to acquire username/password from local configuration
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed