bug fix with missing coherence condition for promises

diff --git a/execution.cc b/execution.cc
index 3a630d777f060cb22598858278044d6e140cfed3..01a5fa442b0905b522f05714d95dc7eaf5fa56a2 100644 (file)
--- a/execution.cc
+++ b/execution.cc
@@ -1753,9 +1753,10 @@ bool ModelExecution::w_modification_order(ModelAction *curr, ModelVector<ModelAc
                                        added = mo_graph->addEdge(act, curr) || added;
                                else if (act->is_read()) {
                                        //if previous read accessed a null, just keep going
-                                       if (act->get_reads_from() == NULL)
-                                               continue;
-                                       added = mo_graph->addEdge(act->get_reads_from(), curr) || added;
+                                       if (act->get_reads_from() == NULL) {
+                                               added = mo_graph->addEdge(act->get_reads_from_promise(), curr) || added;
+                                       } else
+                                               added = mo_graph->addEdge(act->get_reads_from(), curr) || added;
                                }
                                break;
                        } else if (act->is_read() && !act->could_synchronize_with(curr) &&