[INFO] updating cached repository c4dr01d/Carbon
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/c4dr01d/Carbon
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/c4dr01d/Carbon" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/c4dr01d/Carbon"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/c4dr01d/Carbon'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/c4dr01d/Carbon" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/c4dr01d/Carbon"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/c4dr01d/Carbon'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b958ec4ef8dbb1d8b3528e92892de20598ebd3b9
[INFO] sha for GitHub repo c4dr01d/Carbon: b958ec4ef8dbb1d8b3528e92892de20598ebd3b9
[INFO] validating manifest of c4dr01d/Carbon on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml for c4dr01d/Carbon
[ERROR]