--- a/mde/gui/widget/layout.d	Sun Aug 31 15:59:17 2008 +0100
+++ b/mde/gui/widget/layout.d	Thu Sep 11 11:33:51 2008 +0100
@@ -428,8 +428,10 @@
                 debug assert (i > 0, "getCell: l < pos[0] (code error)");
                 --i;
             }					// now (l >= pos[i])
-            if (l >= pos[i] + width[i])		// between columns
+            if (l >= pos[i] + width[i]) {	// between columns
+                debug assert (i+1 < minWidth.length, "getCell: l >= pos[$-1] + width[$-1] (code error)");
                 return -i - 1;			// note: i might be 0 so cannot just return -i
+            }
             return i;
         }