[INFO] updating cached repository https://github.com/paritytech/polkadot
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/paritytech/polkadot
[INFO] [stderr]  * [new branch]        andre/v0.6.1         -> andre/v0.6.1
[INFO] [stderr]  + d8ff0534...979e1982 bkchr-cumulus-branch -> bkchr-cumulus-branch  (forced update)
[INFO] [stderr]  * [new branch]        dd-kusama-cc2-readme -> dd-kusama-cc2-readme
[INFO] [stderr]    de62f9bc..09bdb4df  gav-parathreads      -> gav-parathreads
[INFO] [stderr]    a551f849..d517dbeb  master               -> master
[INFO] [stderr]  * [new branch]        td-accounts-rpc      -> td-accounts-rpc
[INFO] [stderr]    b9d2b35b..5020fa48  v0.6                 -> v0.6
[INFO] [stderr]  * [new tag]           delete               -> delete
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d517dbeb1d27b8068952e086c9ae472d49b707bd
[ERROR] this task or one of its parent failed!
[ERROR] command `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.