Merge pull request #68442 from CaoShuFeng/json-patch

vendor: bump github.com/evanphx/json-patch

vendor/github.com/evanphx/json-patch/README.md

@@ -15,7 +15,7 @@ go get -u github.com/evanphx/json-patch
 ```
 
 **Stable Versions**:
-* Version 3: `go get -u gopkg.in/evanphx/json-patch.v3`
+* Version 4: `go get -u gopkg.in/evanphx/json-patch.v4`
 
 (previous versions below `v3` are unavailable)
 

vendor/github.com/evanphx/json-patch/patch.go

@@ -236,7 +236,7 @@ func (o operation) path() string {
 }
 
 func (o operation) from() string {
-	if obj, ok := o["from"]; ok && obj != nil{
+	if obj, ok := o["from"]; ok && obj != nil {
 		var op string
 
 		err := json.Unmarshal(*obj, &op)
@@ -389,17 +389,13 @@ func (d *partialArray) add(key string, val *lazyNode) error {
 
 	cur := *d
 
-	if idx < 0 {
-		idx *= -1
-
-		if idx > len(ary) {
-			return fmt.Errorf("Unable to access invalid index: %d", idx)
-		}
-		idx = len(ary) - idx
-	}
-	if idx < 0 || idx >= len(ary) || idx > len(cur) {
+	if idx < -len(ary) || idx >= len(ary) {
 		return fmt.Errorf("Unable to access invalid index: %d", idx)
 	}
+
+	if idx < 0 {
+		idx += len(ary)
+	}
 	copy(ary[0:idx], cur[0:idx])
 	ary[idx] = val
 	copy(ary[idx+1:], cur[idx:])
@@ -430,9 +426,12 @@ func (d *partialArray) remove(key string) error {
 
 	cur := *d
 
-	if idx >= len(cur) {
+	if idx < -len(cur) || idx >= len(cur) {
 		return fmt.Errorf("Unable to remove invalid index: %d", idx)
 	}
+	if idx < 0 {
+		idx += len(cur)
+	}
 
 	ary := make([]*lazyNode, len(cur)-1)
 
@@ -535,6 +534,8 @@ func (p Patch) test(doc *container, op operation) error {
 			return nil
 		}
 		return fmt.Errorf("Testing value %s failed", path)
+	} else if op.value() == nil {
+		return fmt.Errorf("Testing value %s failed", path)
 	}
 
 	if val.equal(op.value()) {