Workaround issue #5161

Author: nicolasstucki

tests/run-with-compiler/i3876-c.scala

@@ -1,7 +1,7 @@
 import scala.quoted._
 object Test {
   def main(args: Array[String]): Unit = {
-    implicit val toolbox: scala.quoted.Toolbox = scala.quoted.Toolbox.make(getClass.getClassLoader)
+    implicit def toolbox: scala.quoted.Toolbox = scala.quoted.Toolbox.make(getClass.getClassLoader)
 
     val x: Expr[Int] = '{3}