Regression test for minimized ticket

Author: som-snytt

tests/warn/i22727.scala

@@ -0,0 +1,15 @@
+
+//> using options -Werror
+
+object Main {
+  type IXY = (Int, Int)
+
+  extension (xy: IXY) {
+    def map(f: Int => Int): (Int, Int) = (f(xy._1), f(xy._2))
+  }
+
+  def main(args: Array[String]): Unit = {
+    val a = (0, 1)
+    println(a)
+  }
+}