[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-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/1521350289/study_rust"` [INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/1521350289/study_rust'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/1521350289/study_rust" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/1521350289/study_rust"` [INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/1521350289/study_rust'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] fe3ea32740d5ce399159506be726428505bdc798 [INFO] sha for GitHub repo 1521350289/study_rust: fe3ea32740d5ce399159506be726428505bdc798 [INFO] validating manifest of 1521350289/study_rust on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e [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]