[INFO] cloning repository susytech/superstring
[INFO] running `"git" "clone" "--bare" "git://github.com/susytech/superstring.git" "work/cache/sources/gh/susytech/superstring"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/susytech/superstring'...
[INFO] [stderr] warning: You appear to have cloned an empty repository.
[INFO] running `"git" "clone" "work/cache/sources/gh/susytech/superstring" "work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/susytech/superstring"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/susytech/superstring'...
[INFO] [stderr] warning: You appear to have cloned an empty repository.
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/susytech/superstring" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/susytech/superstring"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/susytech/superstring'...
[INFO] [stderr] warning: You appear to have cloned an empty repository.
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] HEAD
[INFO] sha for GitHub repo susytech/superstring: HEAD
[INFO] validating manifest of susytech/superstring on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml for susytech/superstring
[ERROR]