signrawtransactionwithkey: report error when missing redeemScript/witnessScript param

src/rpc/rawtransaction_util.cpp

@@ -221,6 +221,9 @@ UniValue SignTransaction(CMutableTransaction& mtx, const UniValue& prevTxsUnival
                     // Automatically also add the P2WSH wrapped version of the script (to deal with P2SH-P2WSH).
                     keystore->AddCScript(GetScriptForWitness(witnessScript));
                 }
+                if (rs.isNull() && ws.isNull()) {
+                    throw JSONRPCError(RPC_INVALID_PARAMETER, "Missing redeemScript/witnessScript");
+                }
             }
         }
     }