dash-spv: non-exclusive peer disconnection test times out on Ubuntu ARM

[thepastaclaw]

Ubuntu ARM SPV non-exclusive peer disconnection test timeout

Summary

dash-spv has an intermittent CI failure in
tests_disconnect::test_sync_with_peer_disconnection_non_exclusive on the
Ubuntu ARM SPV job.

This was seen on PR #749, whose diff only touches key-wallet-ffi files, while
this failure is in dash-spv reconnect/discovery behavior.

Failing CI

• PR: fix(ffi): free transaction byte buffers correctly #749
• Run: https://github.com/dashpay/rust-dashcore/actions/runs/25588850729
• Job: https://github.com/dashpay/rust-dashcore/actions/runs/25588850729/job/75122682765
• Artifact: https://github.com/dashpay/rust-dashcore/actions/runs/25588850729/artifacts/6892053328

Failure mode

The test timed out after forcing three peer disconnections:

thread 'tests_disconnect::test_sync_with_peer_disconnection_non_exclusive'
panicked at dash-spv/tests/dashd_sync/helpers.rs:283:17:
Timeout after 3 disconnections. Current progress: ...
headers: WaitingForConnections, tip_height: 16000, target_height: 40000
filter_headers: WaitForEvents, current_height: 8000, target_height: 40000
filters: WaitingForConnections, stored_height: 1999, target_height: 40000
blocks: WaitForEvents, last_processed: 1188, requested: 42, downloaded: 14

The same run passed the other SPV jobs (Ubuntu / spv, Windows / spv, and
macOS / spv). The base branch CI for v0.42-dev at
53130869e5b9343ae59016323e5e5269e717a8fd also passed Ubuntu ARM / spv
shortly afterwards in run 25589413352.

Why this appears flaky / pre-existing

PR #749 changes only:

• key-wallet-ffi/FFI_API.md
• key-wallet-ffi/src/transaction.rs
• key-wallet-ffi/src/transaction_tests.rs

It does not touch dash-spv, peer discovery, reconnect handling, or the failing
test. The failure is a timeout/race-like stall in the non-exclusive reconnect
path after forced peer disconnects on Ubuntu ARM.

Reproduction

With dashd test data configured as in CI:

cargo test -p dash-spv --test dashd_sync \
  tests_disconnect::test_sync_with_peer_disconnection_non_exclusive \
  -- --exact --nocapture

CI sets these environment variables via contrib/setup-dashd.py / workflow
setup:

• DASHD_PATH
• DASHD_TEST_DATA
• RUST_BACKTRACE=1

[xdustinface]

Just a flaky run which already gets addressed in #746