.

wcfs/δbtail_test.go

@@ -1034,6 +1034,10 @@ func TestΔBTail(t *testing.T) {
 		// 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",
+
+		// was leading to wrongly computed trackIdx2
+		"T2/T1-T/B0:g-B1:b-T/B2:b,3:a",
+		"T2/T1-T/T-T-B2:a/B0:c-B1:g",
 	}
 	// direct  tree_i -> tree_{i+1} -> _{i+2} ...   plus
 	// reverse ... tree_i <- _{i+1} <- _{i+2}