Index: src/route-rnd/regression/crbs/index.in
===================================================================
--- src/route-rnd/regression/crbs/index.in	(revision 1437)
+++ src/route-rnd/regression/crbs/index.in	(revision 1438)
@@ -31,5 +31,8 @@
 all conflicts can be resolved by smart layer assignment, without detours or
 vias.
 
+@ pcb_2dip
+Two dip8 randomly aligned with random connections, on two layers.
+
 @ pcb_many_small
 A random board with many small pins.
Index: src/route-rnd/regression/crbs/pcb_2dip.tdx
===================================================================
--- src/route-rnd/regression/crbs/pcb_2dip.tdx	(nonexistent)
+++ src/route-rnd/regression/crbs/pcb_2dip.tdx	(revision 1438)
@@ -0,0 +1,92 @@
+tEDAx v1
+
+begin stackup v1 board_stackup
+ layer 3.top_copper top copper
+  lprop 3.top_copper display-color #8b2323
+ layer 8.bottom_copper bottom copper
+  lprop 8.bottom_copper display-color #3a5fcd
+end stackup
+
+begin polyline v1 pstk_0x56085929b880_0x56085911f3a0
+ v -0.916 -0.916
+ v 0.916 -0.916
+ v 0.916 0.916
+ v -0.916 0.916
+end polyline
+begin polyline v1 pstk_0x5608592a5be0_0x56085911f3a0
+ v -0.916 -0.916
+ v 0.916 -0.916
+ v 0.916 0.916
+ v -0.916 0.916
+end polyline
+begin layernet v1 3.top_copper
+ poly pcb/443/470 pcbrnd1 tmd pstk_0x56085929b880_0x56085911f3a0 12.7 14.605
+ line pcb/443/471 pcbrnd6 tmd 20.32 14.605 20.32 14.605 1.832 0.1
+ line pcb/443/472 pcbrnd2 tmd 12.7 17.145 12.7 17.145 1.832 0.1
+ line pcb/443/473 pcbrnd5 tmd 20.32 17.145 20.32 17.145 1.832 0.1
+ line pcb/443/474 pcbrnd3 tmd 12.7 19.685 12.7 19.685 1.832 0.1
+ line pcb/443/475 pcbrnd3 tmd 20.32 19.685 20.32 19.685 1.832 0.1
+ line pcb/443/476 pcbrnd4 tmd 12.7 22.225 12.7 22.225 1.832 0.1
+ line pcb/443/477 pcbrnd2 tmd 20.32 22.225 20.32 22.225 1.832 0.1
+ poly pcb/583/610 pcbrnd1 tmd pstk_0x5608592a5be0_0x56085911f3a0 35.56 19.685
+ line pcb/583/611 - tmd 43.18 19.685 43.18 19.685 1.832 0.1
+ line pcb/583/612 pcbrnd6 tmd 35.56 22.225 35.56 22.225 1.832 0.1
+ line pcb/583/613 pcbrnd5 tmd 43.18 22.225 43.18 22.225 1.832 0.1
+ line pcb/583/614 pcbrnd4 tmd 35.56 24.765 35.56 24.765 1.832 0.1
+ line pcb/583/615 pcbrnd3 tmd 43.18 24.765 43.18 24.765 1.832 0.1
+ line pcb/583/616 pcbrnd4 tmd 35.56 27.305 35.56 27.305 1.832 0.1
+ line pcb/583/617 pcbrnd1 tmd 43.18 27.305 43.18 27.305 1.832 0.1
+end layernet
+
+begin polyline v1 pstk_0x56085929b880_0x56085911f5a0
+ v -0.916 -0.916
+ v 0.916 -0.916
+ v 0.916 0.916
+ v -0.916 0.916
+end polyline
+begin polyline v1 pstk_0x5608592a5be0_0x56085911f5a0
+ v -0.916 -0.916
+ v 0.916 -0.916
+ v 0.916 0.916
+ v -0.916 0.916
+end polyline
+begin layernet v1 8.bottom_copper
+ poly pcb/443/470 pcbrnd1 tmd pstk_0x56085929b880_0x56085911f5a0 12.7 14.605
+ line pcb/443/471 pcbrnd6 tmd 20.32 14.605 20.32 14.605 1.832 0.1
+ line pcb/443/472 pcbrnd2 tmd 12.7 17.145 12.7 17.145 1.832 0.1
+ line pcb/443/473 pcbrnd5 tmd 20.32 17.145 20.32 17.145 1.832 0.1
+ line pcb/443/474 pcbrnd3 tmd 12.7 19.685 12.7 19.685 1.832 0.1
+ line pcb/443/475 pcbrnd3 tmd 20.32 19.685 20.32 19.685 1.832 0.1
+ line pcb/443/476 pcbrnd4 tmd 12.7 22.225 12.7 22.225 1.832 0.1
+ line pcb/443/477 pcbrnd2 tmd 20.32 22.225 20.32 22.225 1.832 0.1
+ poly pcb/583/610 pcbrnd1 tmd pstk_0x5608592a5be0_0x56085911f5a0 35.56 19.685
+ line pcb/583/611 - tmd 43.18 19.685 43.18 19.685 1.832 0.1
+ line pcb/583/612 pcbrnd6 tmd 35.56 22.225 35.56 22.225 1.832 0.1
+ line pcb/583/613 pcbrnd5 tmd 43.18 22.225 43.18 22.225 1.832 0.1
+ line pcb/583/614 pcbrnd4 tmd 35.56 24.765 35.56 24.765 1.832 0.1
+ line pcb/583/615 pcbrnd3 tmd 43.18 24.765 43.18 24.765 1.832 0.1
+ line pcb/583/616 pcbrnd4 tmd 35.56 27.305 35.56 27.305 1.832 0.1
+ line pcb/583/617 pcbrnd1 tmd 43.18 27.305 43.18 27.305 1.832 0.1
+end layernet
+
+
+begin route_req v1 -
+ stackup board_stackup
+ via pcb/443/470 pcbrnd1 tmd 12.7 14.605 0.8 0
+ via pcb/443/471 pcbrnd6 tmd 20.32 14.605 0.8 0
+ via pcb/443/472 pcbrnd2 tmd 12.7 17.145 0.8 0
+ via pcb/443/473 pcbrnd5 tmd 20.32 17.145 0.8 0
+ via pcb/443/474 pcbrnd3 tmd 12.7 19.685 0.8 0
+ via pcb/443/475 pcbrnd3 tmd 20.32 19.685 0.8 0
+ via pcb/443/476 pcbrnd4 tmd 12.7 22.225 0.8 0
+ via pcb/443/477 pcbrnd2 tmd 20.32 22.225 0.8 0
+ via pcb/583/610 pcbrnd1 tmd 35.56 19.685 0.8 0
+ via pcb/583/611 - tmd 43.18 19.685 0.8 0
+ via pcb/583/612 pcbrnd6 tmd 35.56 22.225 0.8 0
+ via pcb/583/613 pcbrnd5 tmd 43.18 22.225 0.8 0
+ via pcb/583/614 pcbrnd4 tmd 35.56 24.765 0.8 0
+ via pcb/583/615 pcbrnd3 tmd 43.18 24.765 0.8 0
+ via pcb/583/616 pcbrnd4 tmd 35.56 27.305 0.8 0
+ via pcb/583/617 pcbrnd1 tmd 43.18 27.305 0.8 0
+ route_all
+end route_req