.

wcfs/δbtail_test.go

@@ -1484,6 +1484,10 @@ func TestΔBTail(t *testing.T) {
 		"T1/T-T/B0:g-T2/B1:h-B2:g",
 		"T/T1/T-T2/B0:e-B1:f-B2:g",
 
+		// found by AllStructs (union: node is reachable from multiple parents)
+		"T4/T1-T/T-T2-B4:c/T-T-T/B0:f-B1:h-B2:g,3:b",
+		"T1/T-T/T-T2/T-T-T/B0:f-B1:h-B2:f",
+
 		// XXX TODO classify
 		"T2/B1:a-B7:g", "T2,8/B1:a-B7:g-B9:i",