[INFO] crate iot_hub 0.0.2 is already in cache
[INFO] extracting crate iot_hub 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/iot_hub/0.0.2
[INFO] extracting crate iot_hub 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/iot_hub/0.0.2
[INFO] validating manifest of iot_hub-0.0.2 on toolchain 1.37.0
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml for iot_hub-0.0.2
[ERROR]