--- libdwarf_frame.c	(revision 351450)
+++ libdwarf_frame.c	(working copy)
@@ -458,6 +458,13 @@ 
 
 	offset = 0;
 	while (offset < ds->ds_size) {
+		/* 
+		  If the size of the section is greater than 0 and its type is 
+		  NOBITS, then ds_data is NULL and this function should 
+		  never have been called.
+		*/
+		assert(ds->ds_data != NULL);
+
 		entry_off = offset;
 		length = dbg->read(ds->ds_data, &offset, 4);
 		if (length == 0xffffffff) {