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-rw-r--r--src/luaotfload-auxiliary.lua16
1 files changed, 14 insertions, 2 deletions
diff --git a/src/luaotfload-auxiliary.lua b/src/luaotfload-auxiliary.lua
index fc2a191..347d9f8 100644
--- a/src/luaotfload-auxiliary.lua
+++ b/src/luaotfload-auxiliary.lua
@@ -305,11 +305,23 @@ local indices
--- int -> (string | false)
local name_of_slot = function (codepoint)
+ if not codepoint or type (codepoint) ~= "number" then
+ logreport ("both", 0, "aux",
+ "invalid parameters to name_of_slot (%s)",
+ tostring (codepoint))
+ return false
+ end
+
if not indices then --- this will load the glyph list
local unicodes = encodings.agl.unicodes
- indices = table.swapped(unicodes)
+ if not unicodes or not next (unicodes)then
+ logreport ("both", 0, "aux",
+ "name_of_slot: failed to load the AGL.")
+ end
+ indices = table.swapped (unicodes)
end
- local glyphname = indices[codepoint]
+
+ local glyphname = indices [codepoint]
if glyphname then
return glyphname
end