.

wcfs/δbtail_test.go

@@ -1057,6 +1057,10 @@ func TestΔBTail(t *testing.T) {
 		// found by AllStructs (unchanged node is reparented)
 		"T1/B0:c-B1:f",
 		"T1/T-T/B0:c-T/B1:h",
+
+		// found by AllStructs (SIGSEGV in ApplyΔ)
+		"T1/T-T2/T-B1:c-B2:c/B0:g",
+		"T1/T-T/B0:g-T/B1:e",
 	}
 	// direct  tree_i -> tree_{i+1} -> _{i+2} ...   plus
 	// reverse ... tree_i <- _{i+1} <- _{i+2}