use update instead of union

charles-cooper · Oct 27, 2024 · 240d9d2 · 240d9d2
1 parent d3967f5
commit 240d9d2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/vyper/venom/analysis/liveness.py b/vyper/venom/analysis/liveness.py
@@ -64,7 +64,7 @@ def _calculate_out_vars(self, bb: IRBasicBlock) -> bool:
         bb.out_vars = OrderedSet()
         for out_bb in bb.cfg_out:
             target_vars = self.input_vars_from(bb, out_bb)
-            bb.out_vars = bb.out_vars.union(target_vars)
+            bb.out_vars.update(target_vars)
         return out_vars != bb.out_vars
 
     # calculate the input variables into self from source