[INFO] updating cached repository https://github.com/paritytech/substrate
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/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/substrate
[INFO] [stderr]  - [deleted]             (none)     -> cmichi-send-local-authority-id-to-telemetry
[INFO] [stderr]  - [deleted]             (none)     -> gui-gav-investigate_npos
[INFO] [stderr]  - [deleted]             (none)     -> joshy-key-type-cleanup
[INFO] [stderr]  - [deleted]             (none)     -> kiz-srml-fixed
[INFO] [stderr]  - [deleted]             (none)     -> rh-fix-babe-epochs
[INFO] [stderr]    42fe3088e..d687a545a  a-sync-explicit            -> a-sync-explicit
[INFO] [stderr]  * [new branch]          andre/grandpa-voting-rules -> andre/grandpa-voting-rules
[INFO] [stderr]    79812911c..c819eac36  async_tx_pool              -> async_tx_pool
[INFO] [stderr]    6384b2f56..d6479fa6d  demi/upgrade-compatible-deps -> demi/upgrade-compatible-deps
[INFO] [stderr]    4c0d5737f..5afb476af  dm-split-babe-verification -> dm-split-babe-verification
[INFO] [stderr]  + 849e5ab73...767b306e5 gui-encodelike-storage2    -> gui-encodelike-storage2  (forced update)
[INFO] [stderr]  * [new branch]          gui-fix-linkedmap-instance -> gui-fix-linkedmap-instance
[INFO] [stderr]  * [new branch]          gui-polkadot               -> gui-polkadot
[INFO] [stderr]  * [new branch]          gui-storage-doc            -> gui-storage-doc
[INFO] [stderr]  * [new branch]          joshy-weight-experiment    -> joshy-weight-experiment
[INFO] [stderr]  * [new branch]          kiz-fix-phragmen           -> kiz-fix-phragmen
[INFO] [stderr]  * [new branch]          marcio/optimize-tree-route -> marcio/optimize-tree-route
[INFO] [stderr]  * [new branch]          marcio/polkadot-v0.5       -> marcio/polkadot-v0.5
[INFO] [stderr]    b29720e90..759ecfcaa  master                     -> master
[INFO] [stderr]    6c8963114..e0d486d61  polkadot-master            -> polkadot-master
[INFO] [stderr]    2fc0eef12..8795ccb59  sp-child-trie-refactor     -> sp-child-trie-refactor
[INFO] [stderr]    f431d63b1..d94fe48ae  sp-pow-aux                 -> sp-pow-aux
[INFO] [stderr]    75f1996ea..3171fc506  td-forks                   -> td-forks
[INFO] [stderr]    1e48f4071..f68038d62  td-logging                 -> td-logging
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 759ecfcaad312a8325b135761f7b4720dda96bc0
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/cargo-home/bin/cargo" "+fe6d05a8b32f5c66c427ca524dbcce5a7145f87e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.