--- /dev/null
+DESCRIPTION OF PROBLEM:
+=======================
+
+The example map, maps/segmentation_fault.map, contains an example of this
+bug. q3map2 might segfault while compiling this map. This sort of thing
+might happen in certain intermediate versions of q3map2 while work is being
+done on fixing the math accuracy. The bug may not have happened in older
+version of q3map2, before the math accuracy issues were addressed.
+
+To trigger the bug, compile the map; you don't need -vis or -light. Only
+-bsp (the first q3map2 stage) is necessary to trigger the bug. The only
+entities in the map are a light and a info_player_deathmatch, so the map will
+compile for any Q3 mod.
+
+Here is a description of the problem brush (brush #0):
+
+ side 0: -z face
+ side 1: +z face
+ side 2: -y face
+ side 3: +x face
+ side 4: +y face
+ side 5: -x face
+ side 6: problem side "accidentally showed up" :-)
+
+Side 6 is actually a superfluous plane and will be NULL'ed out in the code.
+If the code does not handle a NULL'ed out winding correctly, it will
+segfault.