@@ -809,12 +809,11 @@
 end
 
 function ct.parse_span(str,ctx)
 	local function delimited(start, stop, s)
-		-- local r = { pcall(ss.str.delimit, 'utf8', start, stop, s) }
-		-- if r[1] then return table.unpack(r, 2) end
-		-- ctx:fail(tostring(e))
-		return ss.str.delimit(ss.str.enc.utf8, start, stop, s)
+		local r = { pcall(ss.str.delimit, nil, start, stop, s) }
+		if r[1] then return table.unpack(r, 2) end
+		ctx:fail(tostring(r[2]))
 	end
 	local buf = ""
 	local spans = {}
 	local function flush()