Fix for #17445

compiler/src/scala/quoted/runtime/impl/QuotesImpl.scala

@@ -540,8 +540,14 @@ class QuotesImpl private (using val ctx: Context) extends Quotes, QuoteUnpickler
 
       def overloaded(qualifier: Term, name: String, targs: List[TypeRepr], args: List[Term], returnType: TypeRepr): Term =
         withDefaultPos(tpd.applyOverloaded(qualifier, name.toTermName, args, targs, returnType))
+
       def copy(original: Tree)(qualifier: Term, name: String): Select =
+        val sym = original.symbol
+        if sym.name.is(NameKinds.DefaultGetterName) && sym.name.toString == name then
+          tpd.cpy.Select(original)(qualifier, sym.name)
+        else
         tpd.cpy.Select(original)(qualifier, name.toTermName)
+
       def unapply(x: Select): (Term, String) =
         (x.qualifier, x.name.toString)
     end Select

tests/pos-macros/i17445/Macro_1.scala

@@ -0,0 +1,21 @@
+package i17445
+
+import scala.quoted.*
+import scala.collection.*
+
+
+object Macro {
+
+    inline def changeIndexWhere[A](inline expr: A): A =
+      ${ changeIndexWhereImpl('expr) }
+
+    def changeIndexWhereImpl[A: Type](expr: Expr[A])(using Quotes): Expr[A] = {
+        import quotes.reflect.*
+        val r0 = expr.asTerm
+        val checker = new TreeMap() {}
+        println(r0.getClass().getSimpleName())
+        val r = checker.transformTerm(r0)(Symbol.spliceOwner)
+        r.asExprOf[A]
+    }
+
+}

tests/pos-macros/i17445/Test_2.scala

@@ -0,0 +1,9 @@
+//> using options -Ydebug
+package i17445
+
+def complileMe:Int =
+  Macro.changeIndexWhere {
+    val arr = Array(1, 2, 3)
+    val result = arr.indexWhere(_ == 2)
+    result
+  }