From 5e0ec33b3d9379b78084cd59a9ebed3fc583eed6 Mon Sep 17 00:00:00 2001
From: Garret Rieger <grieger@google.com>
Date: Wed, 12 May 2021 14:46:54 -0700
Subject: [PATCH] Error when link width not in [2, 4]

---
 src/hb-repacker.hh | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/hb-repacker.hh b/src/hb-repacker.hh
index 8d222712d..e553bc622 100644
--- a/src/hb-repacker.hh
+++ b/src/hb-repacker.hh
@@ -629,26 +629,31 @@ struct graph_t
                  char* head,
                  hb_serialize_context_t* c) const
   {
-    if (link.width == 4)
+    switch (link.width)
     {
+    case 4:
       if (link.is_signed)
       {
         serialize_link_of_type<OT::HBINT32> (link, head, c);
       } else {
         serialize_link_of_type<OT::HBUINT32> (link, head, c);
       }
-    }
-    else if (link.width == 2)
-    {
+      return;
+    case 2:
       if (link.is_signed)
       {
         serialize_link_of_type<OT::HBINT16> (link, head, c);
       } else {
         serialize_link_of_type<OT::HBUINT16> (link, head, c);
       }
-    }
-    else
+      return;
+    case 3:
       serialize_link_of_type<OT::HBUINT24> (link, head, c);
+      return;
+    default:
+      // Unexpected link width.
+      assert (0);
+    }
   }
 
  public: