[INFO] updating cached repository U007D/rbgk
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/U007D/rbgk
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/U007D/rbgk" "work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/U007D/rbgk"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/U007D/rbgk'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/U007D/rbgk" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/U007D/rbgk"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/U007D/rbgk'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 754d2bf7be126ec97f0351b35564540b0ac35ae2
[INFO] sha for GitHub repo U007D/rbgk: 754d2bf7be126ec97f0351b35564540b0ac35ae2
[INFO] validating manifest of U007D/rbgk on toolchain master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of U007D/rbgk on toolchain try#bad365140e1e8233b42b21af70a407f14ce5fec5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing U007D/rbgk
[INFO] finished frobbing U007D/rbgk
[INFO] frobbed toml for U007D/rbgk written to work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/U007D/rbgk/Cargo.toml
[INFO] started frobbing U007D/rbgk
[INFO] finished frobbing U007D/rbgk
[INFO] frobbed toml for U007D/rbgk written to work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/U007D/rbgk/Cargo.toml
[INFO] crate U007D/rbgk has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `ssh://git@github.com/humanenginuity/hesl`
[INFO] [stderr] error: failed to load source for a dependency on `hesl`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update ssh://git@github.com/humanenginuity/hesl#91260e27
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to fetch into /mnt/big/crater/work/local/cargo-home/git/db/hesl-a034b94ec2eaecb0
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to authenticate when downloading repository
[INFO] [stderr] attempted ssh-agent authentication, but none of the usernames `git` succeeded
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   error authenticating: no auth sock variable; class=Ssh (23)
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed