<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 - Wrong return type in std::strchr"
   href="https://bugs.llvm.org/show_bug.cgi?id=44169">44169</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Wrong return type in std::strchr
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>9.0
          </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>C++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>bert@bertptrs.nl
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=22876" name="attach_22876" title="Minimal example showcasing the bug">attachment 22876</a> <a href="attachment.cgi?id=22876&action=edit" title="Minimal example showcasing the bug">[details]</a></span>
Minimal example showcasing the bug

According to the standard, the return type of std::strchr should be of the same
constness as the input string. This means that if you provide a char*, you
should get a char*, and if you provide a const char*, you should get a const
char* back.

It seems that Clang 9 (using libstdc++ 6.0.27 as the standard library
implementation) returns a char* regardless of input constness.

Attached is a simple program that reproduces the issue. It compiles when using
GCC (version 9.2) but doesn't in Clang.</pre>
        </div>
      </p>


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