chore: add regression test for #19616

hamzaremmal · hamzaremmal · commit 6dc30d508abd · 2025-11-17T13:45:33.000+01:00
diff --git a/tests/pos/i19616.scala b/tests/pos/i19616.scala
@@ -0,0 +1,6 @@
+def Test: Unit =
+  val sb = new StringBuilder
+  var key = ""
+  var map = Map.empty[String, String]
+  map += key -> sb.toString()
+  map += key -> sb.toString
