[INFO] updating cached repository lyapinvi/rust-sandbox-mandelbrot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lyapinvi/rust-sandbox-mandelbrot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lyapinvi/rust-sandbox-mandelbrot" "work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/lyapinvi/rust-sandbox-mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/lyapinvi/rust-sandbox-mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lyapinvi/rust-sandbox-mandelbrot" "work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/lyapinvi/rust-sandbox-mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/lyapinvi/rust-sandbox-mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4a6df888bf03834c80a417c04096986dc31b2d33
[INFO] sha for GitHub repo lyapinvi/rust-sandbox-mandelbrot: 4a6df888bf03834c80a417c04096986dc31b2d33
[INFO] validating manifest of lyapinvi/rust-sandbox-mandelbrot on toolchain master#2bde39b8edce6463e1c37f8a8082a875e7b536b1
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lyapinvi/rust-sandbox-mandelbrot on toolchain try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lyapinvi/rust-sandbox-mandelbrot
[INFO] finished frobbing lyapinvi/rust-sandbox-mandelbrot
[INFO] frobbed toml for lyapinvi/rust-sandbox-mandelbrot written to work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/lyapinvi/rust-sandbox-mandelbrot/Cargo.toml
[INFO] started frobbing lyapinvi/rust-sandbox-mandelbrot
[INFO] finished frobbing lyapinvi/rust-sandbox-mandelbrot
[INFO] frobbed toml for lyapinvi/rust-sandbox-mandelbrot written to work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/lyapinvi/rust-sandbox-mandelbrot/Cargo.toml
[INFO] crate lyapinvi/rust-sandbox-mandelbrot has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/lyapinvi/rust-sandbox-mandelbrot/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" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed