[INFO] cloning repository dcampbell24/rusty_skyscrapers
[INFO] running `"git" "clone" "--bare" "git://github.com/dcampbell24/rusty_skyscrapers.git" "work/cache/sources/gh/dcampbell24/rusty_skyscrapers"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/dcampbell24/rusty_skyscrapers'...
[INFO] running `"git" "clone" "work/cache/sources/gh/dcampbell24/rusty_skyscrapers" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/dcampbell24/rusty_skyscrapers"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/dcampbell24/rusty_skyscrapers'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dcampbell24/rusty_skyscrapers" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/dcampbell24/rusty_skyscrapers"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/dcampbell24/rusty_skyscrapers'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c65709e1cc3a53b6788ca3abb530b10c9a7d4018
[INFO] sha for GitHub repo dcampbell24/rusty_skyscrapers: c65709e1cc3a53b6788ca3abb530b10c9a7d4018
[INFO] validating manifest of dcampbell24/rusty_skyscrapers 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 dcampbell24/rusty_skyscrapers 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 dcampbell24/rusty_skyscrapers
[INFO] finished frobbing dcampbell24/rusty_skyscrapers
[INFO] frobbed toml for dcampbell24/rusty_skyscrapers written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/dcampbell24/rusty_skyscrapers/Cargo.toml
[INFO] started frobbing dcampbell24/rusty_skyscrapers
[INFO] finished frobbing dcampbell24/rusty_skyscrapers
[INFO] frobbed toml for dcampbell24/rusty_skyscrapers written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/dcampbell24/rusty_skyscrapers/Cargo.toml
[INFO] crate dcampbell24/rusty_skyscrapers 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/dcampbell24/rusty_skyscrapers/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