Check for nil entity types

telegram/formatter/formatter.go

@@ -77,7 +77,7 @@ func MergeAdjacentEntities(entities []*client.TextEntity) []*client.TextEntity {
 	excludedIndices := make(map[int]bool)
 
 	for i, entity := range entities {
-		if excludedIndices[i] {
+		if excludedIndices[i] || entity.Type == nil {
 			continue
 		}
 
@@ -88,7 +88,7 @@ func MergeAdjacentEntities(entities []*client.TextEntity) []*client.TextEntity {
 
 		// collect continuations
 		for j, entity2 := range entities[i+1:] {
-			if entity2.Type.TextEntityTypeType() == typ && entity2.Offset == end {
+			if entity2.Type != nil && entity2.Type.TextEntityTypeType() == typ && entity2.Offset == end {
 				end += entity2.Length
 				ei[j+i+1] = true
 			}