[INFO] updating cached repository infinityb/btrfs-backup-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/infinityb/btrfs-backup-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/infinityb/btrfs-backup-rs" "work/ex/clippy-test-run/sources/stable/gh/infinityb/btrfs-backup-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/infinityb/btrfs-backup-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/infinityb/btrfs-backup-rs" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/infinityb/btrfs-backup-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/infinityb/btrfs-backup-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 76ffb45088748a0842d352b31e3cb447dd223221
[INFO] sha for GitHub repo infinityb/btrfs-backup-rs: 76ffb45088748a0842d352b31e3cb447dd223221
[INFO] validating manifest of infinityb/btrfs-backup-rs 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 infinityb/btrfs-backup-rs 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 infinityb/btrfs-backup-rs
[INFO] finished frobbing infinityb/btrfs-backup-rs
[INFO] frobbed toml for infinityb/btrfs-backup-rs written to work/ex/clippy-test-run/sources/stable/gh/infinityb/btrfs-backup-rs/Cargo.toml
[INFO] started frobbing infinityb/btrfs-backup-rs
[INFO] finished frobbing infinityb/btrfs-backup-rs
[INFO] frobbed toml for infinityb/btrfs-backup-rs written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/infinityb/btrfs-backup-rs/Cargo.toml
[INFO] crate infinityb/btrfs-backup-rs 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/infinityb/rust-argparse`
[INFO] [stderr] error: failed to load source for a dependency on `argparse`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/infinityb/rust-argparse#ce82950f
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to fetch into /mnt/big/crater/work/local/cargo-home/git/db/rust-argparse-0a5063b21a4d6fed
[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