[INFO] crate db 0.0.1 is already in cache
[INFO] extracting crate db 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/db/0.0.1
[INFO] extracting crate db 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/db/0.0.1
[INFO] validating manifest of db-0.0.1 on toolchain 1.36.0
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml for db-0.0.1
[ERROR]