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    <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 - Adding char const * and std::string with -DLIBCPP_DEBUG yields segfault"
   href="https://bugs.llvm.org/show_bug.cgi?id=52209">52209</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Adding char const * and std::string  with -DLIBCPP_DEBUG yields segfault
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>11.0
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Linux
          </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>e.fokken+libcpp@posteo.de
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=25371" name="attach_25371" title="full stack trace of the segfault">attachment 25371</a> <a href="attachment.cgi?id=25371&action=edit" title="full stack trace of the segfault">[details]</a></span>
full stack trace of the segfault

Compiling the following with clang++ -DLIBCPP_DEBUG -stdlib=libc++

#include <iostream>

int main() {
  std::pair<bool, double> minimum_{true, 1};

  std::cerr << "instance is below minimum of " +
std::to_string(minimum_.second)
            << "\n";

  return 0;
}

and executing yields a segfault. g++ or clang++ with libstdc++ instead output
the expected:
"instance is below minimum of 1.000000"

I've added a full stack trace.


See also <a href="https://github.com/pboettch/json-schema-validator/issues/177">https://github.com/pboettch/json-schema-validator/issues/177</a>
Hope it helps!</pre>
        </div>
      </p>


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