fix runtime errors

3 files changed, 11 insertions, 4 deletions

diff --git a/script/core/noder.lua b/script/core/noder.lua
index 40a0bb82..a63a1c25 100644
--- a/script/core/noder.lua
+++ b/script/core/noder.lua
@@ -313,7 +313,10 @@ local getKeyMap = util.switch()
     : call(function (source)
         local name = source[1]
         if source.typeGeneric then
-            return 'dg:' .. source.typeGeneric[name][1].start, nil
+            local first = source.typeGeneric[name][1]
+            if first then
+                return 'dg:' .. first.start, nil
+            end
         else
             return 'dn:' .. name, nil
         end
diff --git a/script/core/searcher.lua b/script/core/searcher.lua
index 38124580..e75293f1 100644
--- a/script/core/searcher.lua
+++ b/script/core/searcher.lua
@@ -335,9 +335,9 @@ local genercCache = {
 local function flushGeneric()
     --清除来自泛型的临时对象
     for _, closure in next, genercCache.closureCache do
-        local noders = getNoders(closure)
-        removeID(noders, getID(closure))
         if closure then
+            local noders = getNoders(closure)
+            removeID(noders, getID(closure))
             local values = closure.values
             for i = 1, #values do
                 local value = values[i]
diff --git a/script/provider/markdown.lua b/script/provider/markdown.lua
index a8adbbef..c5765571 100644
--- a/script/provider/markdown.lua
+++ b/script/provider/markdown.lua
@@ -17,7 +17,11 @@ local function checkSplitLine(self)
 end
 
 function mt:add(language, text)
-    if not text or #text == 0 then
+    if not text then
+        return
+    end
+    text = tostring(text)
+    if #text == 0 then
         return
     end