[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-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/c4dr01d/Carbon"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/c4dr01d/Carbon'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/c4dr01d/Carbon" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/c4dr01d/Carbon"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/c4dr01d/Carbon'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] aa502ed59219a4493d57bd99bfa90a8eab35ff20
[INFO] sha for GitHub repo c4dr01d/Carbon: aa502ed59219a4493d57bd99bfa90a8eab35ff20
[INFO] validating manifest of c4dr01d/Carbon on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[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]