[Fix] Do not set output type if list application failed

diff --git a/lualib/lua_selectors/init.lua b/lualib/lua_selectors/init.lua
index 6cdd11584b10d14792ab5fc4385a9a2792d86565..811c5cd50319b4eea588026154fef48cfd54de04 100644 (file)
--- a/lualib/lua_selectors/init.lua
+++ b/lualib/lua_selectors/init.lua
@@ -121,7 +121,9 @@ local function process_selector(task, sel)
         end,
             fun.map(function(list_elt)
               local ret, ty = meth.process(list_elt, pt, meth.args)
-              etype = ty
+              if ret then
+                etype = ty
+              end
               return ret
             end, input)))
         if input and etype then