[INFO] cloning repository lucarlig/rust_challenges
[INFO] running `"git" "clone" "--bare" "git://github.com/lucarlig/rust_challenges.git" "work/cache/sources/gh/lucarlig/rust_challenges"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/lucarlig/rust_challenges'...
[INFO] running `"git" "clone" "work/cache/sources/gh/lucarlig/rust_challenges" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/lucarlig/rust_challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/lucarlig/rust_challenges'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lucarlig/rust_challenges" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/lucarlig/rust_challenges"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/lucarlig/rust_challenges'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f46d818520a830f7dd27769884242a5799126371
[INFO] sha for GitHub repo lucarlig/rust_challenges: f46d818520a830f7dd27769884242a5799126371
[INFO] validating manifest of lucarlig/rust_challenges on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to build-fail:broken
[ERROR] caused by: missing Cargo.toml for lucarlig/rust_challenges
[ERROR]