[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-60620-1/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/1521350289/study_rust"` [INFO] [stderr] Cloning into 'work/ex/pr-60620-1/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/1521350289/study_rust'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/1521350289/study_rust" "work/ex/pr-60620-1/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/1521350289/study_rust"` [INFO] [stderr] Cloning into 'work/ex/pr-60620-1/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/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#ef01f29964df207f181bd5bcf236e41372a17273 [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]