[INFO] cloning repository burtonageo/gpu_mandlebrot
[INFO] running `"git" "clone" "--bare" "git://github.com/burtonageo/gpu_mandlebrot.git" "work/cache/sources/gh/burtonageo/gpu_mandlebrot"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/burtonageo/gpu_mandlebrot'...
[INFO] running `"git" "clone" "work/cache/sources/gh/burtonageo/gpu_mandlebrot" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/burtonageo/gpu_mandlebrot"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/burtonageo/gpu_mandlebrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/burtonageo/gpu_mandlebrot" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/burtonageo/gpu_mandlebrot"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/burtonageo/gpu_mandlebrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a8521c68ca1a67ca00095ecd2ca51054d980dc32
[INFO] sha for GitHub repo burtonageo/gpu_mandlebrot: a8521c68ca1a67ca00095ecd2ca51054d980dc32
[INFO] validating manifest of burtonageo/gpu_mandlebrot 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 burtonageo/gpu_mandlebrot 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 burtonageo/gpu_mandlebrot
[INFO] finished frobbing burtonageo/gpu_mandlebrot
[INFO] frobbed toml for burtonageo/gpu_mandlebrot written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/burtonageo/gpu_mandlebrot/Cargo.toml
[INFO] started frobbing burtonageo/gpu_mandlebrot
[INFO] finished frobbing burtonageo/gpu_mandlebrot
[INFO] frobbed toml for burtonageo/gpu_mandlebrot written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/burtonageo/gpu_mandlebrot/Cargo.toml
[INFO] crate burtonageo/gpu_mandlebrot 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/burtonageo/gpu_mandlebrot/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