.

wcfs/internal/xbtree/rangeset.go

@@ -25,6 +25,8 @@ import (
 	"sort"
 )
 
+const debugRangeSet = true
+
 // Range represents [lo,hi) Key range.
 type Range struct {
 	lo  Key
@@ -55,6 +57,13 @@ func (S *RangeSet) Del(k Key) {
 
 // AddRange adds Range r to the set.
 func (S *RangeSet) AddRange(r Range) {
+	if debugRangeSet {
+		fmt.Printf("\n\nAddRange:\n")
+		fmt.Printf("  S: %s\n", S)
+		fmt.Printf("  r: %s\n", r)
+		defer fmt.Printf("->S: %s\n", S)
+	}
+
 	S.verify()
 	defer S.verify()