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-rw-r--r--tex/context/base/mkiv/font-otc.lua6
1 files changed, 6 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/font-otc.lua b/tex/context/base/mkiv/font-otc.lua
index 67b77b111..f83c3e8ec 100644
--- a/tex/context/base/mkiv/font-otc.lua
+++ b/tex/context/base/mkiv/font-otc.lua
@@ -142,6 +142,12 @@ local function addfeature(data,feature,specifications,prepareonly)
local descriptions = data.descriptions
local resources = data.resources
+
+ if not descriptions or not resources then
+ report_otf("missing specification")
+ return
+ end
+
local features = resources.features
local sequences = resources.sequences