SERVER-41465 fassert when applying operations for transactions on secondaries

Author: jasonjhchan

src/mongo/db/repl/transaction_oplog_application.cpp

@@ -342,8 +342,7 @@ Status _applyPrepareTransaction(OperationContext* opCtx,
     transaction.unstashTransactionResources(opCtx, "prepareTransaction");
 
     auto status = _applyOperationsForTransaction(opCtx, ops, oplogApplicationMode);
-    if (!status.isOK())
-        return status;
+    fassert(31137, status.isOK());
 
     if (MONGO_FAIL_POINT(applyOpsHangBeforePreparingTransaction)) {
         LOG(0) << "Hit applyOpsHangBeforePreparingTransaction failpoint";