fix: rule confusing-naming false positive on multiple blank identifiers (#1536)

rule/confusing_naming.go

@@ -167,6 +167,11 @@ func checkStructFields(fields *ast.FieldList, structName string, w *lintConfusin
 	bl := make(map[string]bool, len(fields.List))
 	for _, f := range fields.List {
 		for _, id := range f.Names {
+			// Skip blank identifiers
+			if id.Name == "_" {
+				continue
+			}
+
 			normName := strings.ToUpper(id.Name)
 			if bl[normName] {
 				w.onFailure(lint.Failure{

testdata/confusing_naming1.go

@@ -81,3 +81,17 @@ type b[T any] struct{}
 
 func (x *b[T]) method() {
 }
+
+// Multiple blank identifiers should be allowed (for padding/alignment)
+type siginfoChild struct {
+	signo    int32
+	errno    int32
+	exitCode int32
+	_        int32
+
+	pid    int32
+	uid    uint32
+	status int32
+
+	_ [25]uint32
+}