Merge 6c7ebcc into merged_master (Bitcoin PR bitcoin/bitcoin#27422)

Author: delta1

test/functional/rpc_scantxoutset.py

@@ -126,6 +126,9 @@ def run_test(self):
         assert_equal(self.nodes[0].scantxoutset("status"), None)
         assert_equal(self.nodes[0].scantxoutset("abort"), False)
 
+        # check that first arg is needed
+        assert_raises_rpc_error(-1, "scantxoutset \"action\" ( [scanobjects,...] )", self.nodes[0].scantxoutset)
+
         # Check that second arg is needed for start
         assert_raises_rpc_error(-1, "scanobjects argument is required for the start action", self.nodes[0].scantxoutset, "start")