[INFO] updating cached repository paulrouget/hnbrowser
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/paulrouget/hnbrowser
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/paulrouget/hnbrowser" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/paulrouget/hnbrowser"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/paulrouget/hnbrowser'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/paulrouget/hnbrowser" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/paulrouget/hnbrowser"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/paulrouget/hnbrowser'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 98123296bfedbf56367ce6d9687f1c3c8d844681
[INFO] sha for GitHub repo paulrouget/hnbrowser: 98123296bfedbf56367ce6d9687f1c3c8d844681
[INFO] validating manifest of paulrouget/hnbrowser 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 paulrouget/hnbrowser 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 paulrouget/hnbrowser
[INFO] finished frobbing paulrouget/hnbrowser
[INFO] frobbed toml for paulrouget/hnbrowser written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/paulrouget/hnbrowser/Cargo.toml
[INFO] started frobbing paulrouget/hnbrowser
[INFO] finished frobbing paulrouget/hnbrowser
[INFO] frobbed toml for paulrouget/hnbrowser written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/paulrouget/hnbrowser/Cargo.toml
[INFO] crate paulrouget/hnbrowser 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]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: failed to load source for a dependency on `libservo`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update /mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/paulrouget/servo/components/servo
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to read `/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/paulrouget/servo/components/servo/Cargo.toml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No such file or directory (os error 2)
[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