[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-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/FranklinChen/rust-string-quickchecked"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/FranklinChen/rust-string-quickchecked'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FranklinChen/rust-string-quickchecked" "work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/FranklinChen/rust-string-quickchecked"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/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#6ea4036cd20a4b1ab1d56e555108c21735ff6946
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of FranklinChen/rust-string-quickchecked on toolchain try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-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-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/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-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/FranklinChen/rust-string-quickchecked/Cargo.toml
[INFO] crate FranklinChen/rust-string-quickchecked already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed