action: bugfix - reads-from value should be VALUE_NONE for new actions

[model-checker.git] / action.cc

diff --git a/action.cc b/action.cc
index 5f83c3f5604524692e88e1c9478db7bb9f7216fc..757b3d1d2fcc53bf1ed86a711785a84f808d1883 100644 (file)
--- a/action.cc
+++ b/action.cc
@@ -394,7 +394,9 @@ uint64_t ModelAction::get_reads_from_value() const
        ASSERT(is_read());
        if (reads_from)
                return reads_from->get_write_value();
-       return reads_from_promise->get_value();
+       else if (reads_from_promise)
+               return reads_from_promise->get_value();
+       return VALUE_NONE; /* Only for new actions with no reads-from */
 }
 
 /**