[INFO] updating cached repository tong92/sicp
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tong92/sicp
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tong92/sicp" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/tong92/sicp"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/tong92/sicp'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tong92/sicp" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/tong92/sicp"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/tong92/sicp'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] af0ba0b5b10460184013b3b6a9917657998a10a7
[INFO] sha for GitHub repo tong92/sicp: af0ba0b5b10460184013b3b6a9917657998a10a7
[INFO] validating manifest of tong92/sicp on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to build-fail:broken
[ERROR] caused by: missing Cargo.toml for tong92/sicp
[ERROR]