X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=action.cc;h=757b3d1d2fcc53bf1ed86a711785a84f808d1883;hb=c4c6c997cb5d2d651d4dfa76390a42592432d266;hp=5f83c3f5604524692e88e1c9478db7bb9f7216fc;hpb=a0db445e3ecfedce6a85b7b381416b5c363a0614;p=model-checker.git

diff --git a/action.cc b/action.cc
index 5f83c3f..757b3d1 100644
--- 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 */
 }
 
 /**