[INFO] cloning repository pshc/rusthack
[INFO] running `"git" "clone" "--bare" "git://github.com/pshc/rusthack.git" "work/cache/sources/gh/pshc/rusthack"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/pshc/rusthack'...
[INFO] running `"git" "clone" "work/cache/sources/gh/pshc/rusthack" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/pshc/rusthack"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/pshc/rusthack'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pshc/rusthack" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/pshc/rusthack"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/pshc/rusthack'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1a4d538badad95ed7fc35e02b22a07e2196983cf
[INFO] sha for GitHub repo pshc/rusthack: 1a4d538badad95ed7fc35e02b22a07e2196983cf
[INFO] validating manifest of pshc/rusthack on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pshc/rusthack on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pshc/rusthack
[INFO] finished frobbing pshc/rusthack
[INFO] frobbed toml for pshc/rusthack written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/pshc/rusthack/Cargo.toml
[INFO] started frobbing pshc/rusthack
[INFO] finished frobbing pshc/rusthack
[INFO] frobbed toml for pshc/rusthack written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/pshc/rusthack/Cargo.toml
[INFO] crate pshc/rusthack has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/pshc/rusthack/Cargo.lock needs to be updated but --locked was passed to prevent this
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed