[INFO] cloning repository zowens/rusty-scheme
[INFO] running `"git" "clone" "--bare" "git://github.com/zowens/rusty-scheme.git" "work/cache/sources/gh/zowens/rusty-scheme"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/zowens/rusty-scheme'...
[INFO] running `"git" "clone" "work/cache/sources/gh/zowens/rusty-scheme" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/zowens/rusty-scheme"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/zowens/rusty-scheme'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zowens/rusty-scheme" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/zowens/rusty-scheme"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/zowens/rusty-scheme'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 96a2e1856d279d2c8c1a09b25d2aa7a3e0df08f7
[INFO] sha for GitHub repo zowens/rusty-scheme: 96a2e1856d279d2c8c1a09b25d2aa7a3e0df08f7
[INFO] validating manifest of zowens/rusty-scheme 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 zowens/rusty-scheme 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 zowens/rusty-scheme
[INFO] finished frobbing zowens/rusty-scheme
[INFO] frobbed toml for zowens/rusty-scheme written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/zowens/rusty-scheme/Cargo.toml
[INFO] started frobbing zowens/rusty-scheme
[INFO] finished frobbing zowens/rusty-scheme
[INFO] frobbed toml for zowens/rusty-scheme written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/zowens/rusty-scheme/Cargo.toml
[INFO] crate zowens/rusty-scheme 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]     Blocking waiting for file lock on the git checkouts
[INFO] [stderr]     Updating git repository `https://github.com/goffrie/plex`
[INFO] [stderr]     Updating git repository `https://github.com/rustyhorde/repl`
[INFO] [stderr]     Updating git repository `https://github.com/goffrie/lalr`
[INFO] [stderr]     Updating git repository `https://github.com/goffrie/regex-dfa`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/zowens/rusty-scheme/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