[INFO] crate mongo 0.0.1 is already in cache
[INFO] extracting crate mongo 0.0.1 into work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/reg/mongo/0.0.1
[INFO] extracting crate mongo 0.0.1 into work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/reg/mongo/0.0.1
[INFO] validating manifest of mongo-0.0.1 on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to build-fail:broken
[ERROR] caused by: missing Cargo.toml for mongo-0.0.1
[ERROR]