Add regression test

Closes #9363

Author: nicolasstucki

tests/pos/i9363.scala

@@ -0,0 +1,8 @@
+class Foo:
+  protected inline def fooProtected: Int = 12
+
+object Foo extends Foo:
+  inline def foo: Int = fooProtected
+
+object Bar:
+  def bar: Int = Foo.foo