Merge pull request #8184 from dotty-staging/fix-8178

Fix #8178: add test

Author: nicolasstucki

tests/run-staging/i8178.scala

@@ -0,0 +1,15 @@
+import scala.quoted._
+import scala.quoted.staging._
+
+def foo(n: Int, t: Expr[Int])(using QuoteContext): Expr[Int] =
+  if (n == 0) t
+  else '{ val a = ${Expr(n)}; ${foo(n - 1, 'a)} + $t  }
+
+@main def Test = {
+  // make available the necessary toolbox for runtime code generation
+  given Toolbox = Toolbox.make(getClass.getClassLoader)
+
+  val f: Int = run { foo(2, Expr(5)) }
+
+  println(f)
+}