[INFO] updating cached repository FranklinChen/rust-string-quickchecked
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/FranklinChen/rust-string-quickchecked
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/FranklinChen/rust-string-quickchecked" "work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/FranklinChen/rust-string-quickchecked"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/FranklinChen/rust-string-quickchecked'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FranklinChen/rust-string-quickchecked" "work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/FranklinChen/rust-string-quickchecked"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/FranklinChen/rust-string-quickchecked'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6fc5f6874e4282eb0704ddafd78a0f12842fe4dc
[INFO] sha for GitHub repo FranklinChen/rust-string-quickchecked: 6fc5f6874e4282eb0704ddafd78a0f12842fe4dc
[INFO] validating manifest of FranklinChen/rust-string-quickchecked on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of FranklinChen/rust-string-quickchecked on toolchain try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing FranklinChen/rust-string-quickchecked
[INFO] finished frobbing FranklinChen/rust-string-quickchecked
[INFO] frobbed toml for FranklinChen/rust-string-quickchecked written to work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/FranklinChen/rust-string-quickchecked/Cargo.toml
[INFO] started frobbing FranklinChen/rust-string-quickchecked
[INFO] finished frobbing FranklinChen/rust-string-quickchecked
[INFO] frobbed toml for FranklinChen/rust-string-quickchecked written to work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/FranklinChen/rust-string-quickchecked/Cargo.toml
[INFO] crate FranklinChen/rust-string-quickchecked has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: failed to load source for a dependency on `quickcheck`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/BurntSushi/quickcheck#ae5af3a6
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse manifest at `/mnt/big/crater/work/local/cargo-home/git/checkouts/quickcheck-4a9a66ec744c4e98/ae5af3a/quickcheck_macros/Cargo.toml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   invalid type: map, expected a string for key `lib`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed