[INFO] updating cached repository xlnx/rusty-frontend
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/xlnx/rusty-frontend
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/xlnx/rusty-frontend" "work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/xlnx/rusty-frontend"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/xlnx/rusty-frontend'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/xlnx/rusty-frontend" "work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/xlnx/rusty-frontend"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/xlnx/rusty-frontend'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 754ecd9e12321db7996a9667ce06ab229b2dca2f
[INFO] sha for GitHub repo xlnx/rusty-frontend: 754ecd9e12321db7996a9667ce06ab229b2dca2f
[INFO] validating manifest of xlnx/rusty-frontend on toolchain master#efe2f32a6b8217425f361ec7c206910c611c03ee
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml for xlnx/rusty-frontend
[ERROR]