Add regression test

Author: nicolasstucki

tests/pos-macros/i11782.scala

@@ -0,0 +1,12 @@
+import scala.quoted._
+
+trait X[A] { def x(a: A): Boolean }
+
+def hmm[A](using Quotes, Type[A]): Expr[Unit] = {
+  def sadFace(f: (Expr[A]) => Expr[Boolean]): Expr[X[A]] = '{
+    new X[A] {
+      override def x(a: A) = ${f('a)}
+    }
+  }
+  '{()}
+}