[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-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/U007D/rbgk"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/U007D/rbgk'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/U007D/rbgk" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/U007D/rbgk"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/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#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of U007D/rbgk on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-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-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/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-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/U007D/rbgk/Cargo.toml
[INFO] crate U007D/rbgk already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed