Index: colin.p
===================================================================
--- colin.p	(nonexistent)
+++ colin.p	(revision 19442)
@@ -0,0 +1,11 @@
+# trigger div-by-zero:
+# two colinear horizontal edges
+3 3
+5 3
+7 3
+
+# and a point far
+5 6
+
+
+
Index: colin2.p
===================================================================
--- colin2.p	(nonexistent)
+++ colin2.p	(revision 19442)
@@ -0,0 +1,11 @@
+# trigger div-by-zero:
+# two almost colinear (almost) horizontal edges
+3 3
+5 3.01
+7 3
+
+# and a point far
+5 6
+
+
+