[INFO] updating cached repository https://github.com/linkerd/linkerd2-proxy
[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/linkerd/linkerd2-proxy
[INFO] [stderr]  - [deleted]         (none)     -> alex/trace_labels
[INFO] [stderr]  - [deleted]         (none)     -> ver/ci-docker-host
[INFO] [stderr]  * [new branch]      alex/fmt_metric           -> alex/fmt_metric
[INFO] [stderr]    6d18aca..a5157c4  alex/instrument-exporter  -> alex/instrument-exporter
[INFO] [stderr]  * [new branch]      alex/instrument-exporter2 -> alex/instrument-exporter2
[INFO] [stderr]  + fb35327...6dd24bd eliza/tap-headers         -> eliza/tap-headers  (forced update)
[INFO] [stderr]    1382f0d..b15735b  master                    -> master
[INFO] [stderr]  * [new tag]         release/v2.73.0           -> release/v2.73.0
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b15735b5c5370bb23116a9ca8d89edb217d12f0c
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/cargo-home/bin/cargo" "+b19afc12c4f781e95f168f2fdea339c972f14ae2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.