ticket #36312

diff --git a/src/ltj-jfont.lua b/src/ltj-jfont.lua
index febcc97..207d0e0 100644 (file)
--- a/src/ltj-jfont.lua
+++ b/src/ltj-jfont.lua
@@ -269,6 +269,7 @@ do
                       '\\endcsname=\\relax')
         return
       end
+      if not f then return end
       update_jfm_cache(j, f.size)
       local ad = identifiers[fn].parameters
       local sz = metrics[j].size_cache[f.size]