Index: src_plugins/io_eagle/read.c
===================================================================
--- src_plugins/io_eagle/read.c	(revision 20919)
+++ src_plugins/io_eagle/read.c	(revision 20920)
@@ -785,6 +785,7 @@
 		case EAGLE_PSH_OCTAGON:
 #warning TODO need octagon shape generation function/API accessible from read.c padstack creation function
 		case EAGLE_PSH_ROUND:
+			assert(dx == dy);
 		case EAGLE_PSH_LONG:
 			shapes[0].layer_mask = PCB_LYT_TOP | PCB_LYT_MASK;
 			shapes[0].comb = PCB_LYC_SUB + PCB_LYC_AUTO;