message: test: Intermittent issue in feature_blockfilterindex_prune
diff: """Test blockfilterindex in conjunction with prune."""
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import (
  - assert_raises_rpc_error,
  + assert_equal,
  assert_greater_than,
  + assert_raises_rpc_error,
  )
  @@ -16,17 +17,18 @@ class FeatureBlockfilterindexPruneTest(BitcoinTestFramework):
  self.extra_args = [["-fastprune", "-prune=1"], ["-fastprune", "-prune=1", "-blockfilterindex=1"]]
  def run_test(self):
  - # test basic pruning compatibility & filter access of pruned blocks
  self.log.info("check if we can access a blockfilter when pruning is enabled but no blocks are actually pruned")
  + self.wait_until(lambda: self.nodes[1].getindexinfo() == {'basic block filter index': {'synced': True, 'best_block_height': 200}})
  assert len(self.nodes[1].getblockfilter(self.nodes[1].getbestblockhash())['filter']) > 0
  # Mine two batches of blocks to avoid hitting NODE_NETWORK_LIMITED_MIN_BLOCKS disconnection
  self.nodes[1].generate(250)
  self.sync_all()
  self.nodes[1].generate(250)
  self.sync_all()
  + self.wait_until(lambda: self.nodes[1].getindexinfo() == {'basic block filter index': {'synced': True, 'best_block_height': 700}})
  self.log.info("prune some blocks")
  pruneheight = self.nodes[1].pruneblockchain(400)
  - assert pruneheight != 0
  + assert_equal(pruneheight, 250)
  self.log.info("check if we can access the tips blockfilter when we have pruned some blocks")
  assert len(self.nodes[1].getblockfilter(self.nodes[1].getbestblockhash())['filter']) > 0
  self.log.info("check if we can access the blockfilter of a pruned block")
  