Fix #10011: Set missing span of extension selection

Author: nicolasstucki

compiler/src/dotty/tools/dotc/typer/Typer.scala

@@ -556,6 +556,7 @@ class Typer extends Namer
 
     def typeSelectOnTerm(using Context): Tree =
       typedSelect(tree, pt, typedExpr(tree.qualifier, selectionProto(tree.name, pt, this)))
+        .withSpan(tree.span)
         .computeNullable()
 
     def typeSelectOnType(qual: untpd.Tree)(using Context) =

tests/run-macros/i10011/Macro_1.scala

@@ -0,0 +1,8 @@
+import scala.quoted._
+
+inline def printPos[T](inline expr: T): (Int, Int) =
+  ${ printPos('expr) }
+
+private def printPos[T](expr: Expr[T])(using QuoteContext): Expr[(Int, Int)] =
+  val pos = expr.unseal.pos
+  Expr((pos.start, pos.end))

tests/run-macros/i10011/Test_2.scala

@@ -0,0 +1,6 @@
+
+extension [T](a: T) def foo: Any = ???
+
+@main def Test =
+  val foo = printPos(Some(1).foo)
+  assert(foo == (79, 90))