pytest: add (xfail) test for store load miscount.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

tests/test_gossip.py

@@ -1153,3 +1153,16 @@ def test_gossip_store_compact(node_factory, bitcoind):
     # Should restart ok.
     l2.restart()
     wait_for(lambda: l2.daemon.is_in_log('gossip_store: Read '))
+
+
+@pytest.mark.xfail(strict=True)
+@unittest.skipIf(not DEVELOPER, "need dev-compact-gossip-store")
+def test_gossip_store_compact_restart(node_factory, bitcoind):
+    l2 = setup_gossip_store_test(node_factory, bitcoind)
+
+    # Should restart ok.
+    l2.restart()
+    wait_for(lambda: l2.daemon.is_in_log('gossip_store: Read '))
+
+    # Now compact store.
+    l2.rpc.call('dev-compact-gossip-store')