[Issue 21275] New: Overload resolution bypasses private access

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21275

          Issue ID: 21275
           Summary: Overload resolution bypasses private access
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: 60rntogo at gmail.com

If I define the following module:

---
module foo;

struct Foo
{
  import std : writeln;

  private int _x;

  private ref int x() return
  {
    writeln("ref int");
    return _x;
  }

  int x() const
  {
    writeln("int");
    return _x;
  }
}
---

and in another module:

---
void main()
{
  import std : writeln;
  import foo : Foo;

  auto f = Foo();
  f.x = 3;
  writeln(f);
}
---

then the program prints

---
ref int
Foo(3)
---

so I have gained access to private method x and member _x.

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