[Minor] Skip modifying headers for skipped tasks

diff --git a/lualib/lua_mime.lua b/lualib/lua_mime.lua
index a57c2181ea7bce81a929bbcb525523f603625bee..a09ef84f80ae6d0c91060e5f8060c62c9d5625d6 100644 (file)
--- a/lualib/lua_mime.lua
+++ b/lualib/lua_mime.lua
@@ -515,6 +515,10 @@ end
 -- Adds/removes headers both internal and in the milter reply
 --]]
 exports.modify_headers = function(task, hdr_alterations)
+  if task:has_flag('skip') then
+    -- Cannot set flags for skipped (and unprocessed) task
+    return
+  end
   local add = hdr_alterations.add or {}
   local remove = hdr_alterations.remove or {}