Reification of a type member selection doesn't account for existing type tags of the selector

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import scala.reflect.runtime.universe._

trait Foo {
  type Bar
}

object Test extends App {
  def foo[E <: Foo : TypeTag] = {
    val x = typeOf[E#Bar]
    println(x)
  }
}

19:03 ~/Projects/210x/sandbox (2.10.x)$ sli
Test.scala:9: materializing requested reflect.runtime.universe.type.TypeTag[E#Bar] using `package`.this.materializeTypeTag[E#Bar](scala.reflect.runtime.`package`.universe)
    val x = typeOf[E#Bar]
                  ^
Test.scala:9: materializing requested reflect.runtime.universe.type.TypeTag[E#Bar] using `package`.this.materializeTypeTag[E#Bar](scala.reflect.runtime.`package`.universe)
    val x = typeOf[E#Bar]
                  ^
Test.scala:9: `package`.this.materializeTypeTag[E#Bar](scala.reflect.runtime.`package`.universe) is not a valid implicit value for reflect.runtime.universe.TypeTag[E#Bar] because:
failed to typecheck the materialized tag:
cannot create a TypeTag having unresolved type parameter E#Bar: use WeakTypeTag instead
    val x = typeOf[E#Bar]
                  ^
Test.scala:9: error: No TypeTag available for E#Bar
    val x = typeOf[E#Bar]
                  ^
one error found

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-7972?orig=1
Reporter: @xeno-by
Affected Versions: 2.10.3

[scabug]

@paulp said:
You might want to look at #7278.