fix a case combining the use of existential op and metatable op. raise error when use existential op in the left part in an assignment.

1 files changed, 23 insertions, 5 deletions

diff --git a/spec/outputs/existential.lua b/spec/outputs/existential.lua
index 4a64c49..b594218 100644
--- a/spec/outputs/existential.lua
+++ b/spec/outputs/existential.lua
@@ -148,9 +148,27 @@ end)() ~= nil) or (function()
         end
         return nil
 end)()
-local _with_0 = io.open("test.txt", "w")
-if _with_0 ~= nil then
-        _with_0:write("hello")
-        _with_0:close()
+do
+        local _with_0 = io.open("test.txt", "w")
+        if _with_0 ~= nil then
+                _with_0:write("hello")
+                _with_0:close()
+        end
+end
+if tb ~= nil then
+        local _obj_1 = getmetatable(tb).__a
+        if _obj_1 ~= nil then
+                _obj_1(123)
+        end
+end
+do
+        local _with_0
+        local _obj_1 = getmetatable(tb)
+        if _obj_1 ~= nil then
+                _with_0 = getmetatable(_obj_1).__index
+        end
+        if _with_0 ~= nil then
+                _with_0.a = 1
+        end
 end
-return _with_0
+return nil