<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </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 - Regression: Linker error: Required destructor"
   href="https://bugs.llvm.org/show_bug.cgi?id=45343">45343</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Regression: Linker error: Required destructor
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>10.0
          </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>enhancement
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>-New Bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>jvapen@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Duplicate of <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Regression: Linker error: Required destructor"
   href="show_bug.cgi?id=45342">BUG45342</a> as something went wrong logging it -> internal error of
the bug tracker

// C:\LLVM_9_0_0\bin\clang-cl.exe /c /EHsc /std:c++17 -w t.cpp /Fot_09.obj
// C:\LLVM_10_0_0\bin\clang-cl.exe /c /EHsc /std:c++17 -w t.cpp /Fot_10.obj
// dumpbin.exe /symbols t_09.obj >t_09.symbols
// dumpbin.exe /symbols t_10.obj >t_10.symbols
class I {
public:
  virtual ~I() = default;
};
class B : public virtual I {
public:
  virtual ~B() = default;
};
class C final : public virtual I, public B {
public:
  explicit C();
  virtual ~C();
};
void f() {
  auto c = new C{};
  delete c;
}

Missing symbol when trying to link ~I
Part of t_10.symbols:
020 00000000 UNDEF  notype       External     | ??1I@@UEAA@XZ (public: virtual
__cdecl I::~I(void))

In LLVM 9.0.0 this symbol ain't required to link, in LLVM 10.0.0 it suddently
becomes required.</pre>
        </div>
      </p>


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