diff --git a/services/gitdiff/gitdiff.go b/services/gitdiff/gitdiff.go
index 9f038c874..8768b960f 100644
--- a/services/gitdiff/gitdiff.go
+++ b/services/gitdiff/gitdiff.go
@@ -1288,6 +1288,14 @@ func CommentAsDiff(c *models.Comment) (*Diff, error) {
 
 // CommentMustAsDiff executes AsDiff and logs the error instead of returning
 func CommentMustAsDiff(c *models.Comment) *Diff {
+	if c == nil {
+		return nil
+	}
+	defer func() {
+		if err := recover(); err != nil {
+			log.Error("PANIC whilst retrieving diff for comment[%d] Error: %v\nStack: %s", c.ID, err, log.Stack(2))
+		}
+	}()
 	diff, err := CommentAsDiff(c)
 	if err != nil {
 		log.Warn("CommentMustAsDiff: %v", err)