bit op (require Lua 5.3)

[luatex-ja/luatexja.git] / src / ltj-ruby.lua

diff --git a/src/ltj-ruby.lua b/src/ltj-ruby.lua
index 782835d..5f66166 100644 (file)
--- a/src/ltj-ruby.lua
+++ b/src/ltj-ruby.lua
@@ -584,7 +584,7 @@ luatexbase.add_to_callback('hpack_filter', pre_high, 'ltj.ruby.pre', 100)
 local post_lown
 do
    local function write_aux(wv, num, bool)
-      local id = has_attr(wv, attr_ruby_id)
+      local id = has_attr(wv, attr_ruby_id) or 0
       if id>0 and cache_handle then
          cache_handle:write(
             'lrob[' .. tostring(id) .. ']=' .. num .. '\nlrob[' .. tostring(-id) .. ']=' .. tostring(bool) .. '\n')