.

wcfs/δbtail_test.go

@@ -519,6 +519,10 @@ func TestΔBTail(t *testing.T) {
 		// degenerate topology from ZODB tests
 		"T4/T2-T/T-T-T6,10/B1:a-B3:b-T-T-T/T-B7:c-B11:d/B5:e",
 		"T/B1:e,5:d,7:c,8:b,11:a", // -3 +8
+
+		// was leading treegen to generate corrupt trees
+		"T/T1/T-T/B0:g-B1:e,2:d,3:h",
+		"T1/T-T3/B0:g-T-T/B1:e,2:d-B3:h",
 	}
 	// direct  tree_i -> tree_{i+1} -> _{i+2} ...   plus
 	// reverse ... tree_i <- _{i+1} <- _{i+2}