<html>
    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - make_shared accesses protected constructors"
   href="https://llvm.org/bugs/show_bug.cgi?id=28929">28929</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>make_shared accesses protected constructors
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libc++
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.9
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>All Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>aaron@aaronballman.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Consider the following code:

#include <memory>

struct S {
private:
  S();

 public:
   void f() { (void)std::make_shared<S>(); }
};

struct T {
protected:
  T();

 public:
   void f() { (void)std::make_shared<T>(); }
};

S::f() will fail to compile because S::S() is private, but T::f() does not fail
to compile with a protected constructor. Giving the class a data member, or
marking the class as final, will cause T::f() to fail as well. Likely caused by
use of EBO.</pre>
        </div>
      </p>
      <hr>
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      <ul>
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