Lua - 太多的捕获。如何解决？

遇到了这个问题。如果尝试转换西里尔字母或者单词太长有太多符号就会出错

function to_string(t)
    local o = {};
    for _, v in ipairs(t) do
        local b = v < 0 and (0xff + v + 1) or v;
        table.insert(o, string.char(b));
    end
    return table.concat(o);
end
function to_bytes(s)
    local c = { s:match( (s:gsub(".", "(.)")) ) };
    local o = {};
    for _, v in pairs(c) do
        table.insert(o, v:byte());
    end
    return o;
end
local t = to_bytes("如果这里有太多的单词或者俄语文字");
local out = "\\"
local chars = #t;
for i = 1, chars do
    out = out..tostring(t[i]);
    if i < chars then
        out = out.."\\"
    end
end
out = out..""