refactor(error): pop xpcall stack obviously

lua/promise-async/error.lua

@@ -66,8 +66,9 @@ end
 
 ---@param startLevel? number
 ---@param skipShortSrc? string
+---@param doPop? boolean
 ---@return PromiseAsyncError
-function Error:buildStack(startLevel, skipShortSrc)
+function Error:buildStack(startLevel, skipShortSrc, doPop)
     local level = startLevel or 1
     local value
     local thread = coroutine.running()
@@ -80,7 +81,9 @@ function Error:buildStack(startLevel, skipShortSrc)
         level = level + 1
         self:push(value)
     end
-    table.remove(self.queue)
+    if doPop then
+        self:pop()
+    end
     return self
 end
 
@@ -130,6 +133,11 @@ function Error:push(value)
     return #self.queue
 end
 
+---@return string
+function Error:pop()
+    return table.remove(self.queue)
+end
+
 ---@return any
 function Error:peek()
     return self.err

lua/promise.lua

@@ -123,8 +123,9 @@ local function handleQueue(promise)
                     return func(result)
                 end, function(errmsg)
                     if type(errmsg) == 'string' then
+                        -- pop xpcall stack
                         newPromise.err = errFactory:new(errmsg)
-                            :buildStack(3, shortSrc)
+                            :buildStack(3, shortSrc, true)
                         return tostring(newPromise.err)
                     end
                     return errmsg
@@ -180,8 +181,9 @@ local function wrapExecutor(promise, executor, self)
         end
     end, function(errmsg)
         if type(errmsg) == 'string' then
+            -- pop xpcall stack
             promise.err = errFactory:new(errmsg)
-                :buildStack(3, shortSrc)
+                :buildStack(3, shortSrc, true)
             return tostring(promise.err)
         end
         return errmsg