[INFO] updating cached repository 1521350289/study_rust [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/1521350289/study_rust [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/1521350289/study_rust" "work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/1521350289/study_rust"` [INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/1521350289/study_rust'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/1521350289/study_rust" "work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/1521350289/study_rust"` [INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/1521350289/study_rust'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 465080aa0100858ccb32b76f8b7c01238594347a [INFO] sha for GitHub repo 1521350289/study_rust: 465080aa0100858ccb32b76f8b7c01238594347a [INFO] validating manifest of 1521350289/study_rust 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 1521350289/study_rust [ERROR]