<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 - clang assert when using PragmaLoopHint with c++11 attribute."
   href="https://bugs.llvm.org/show_bug.cgi?id=46336">46336</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>clang assert when using PragmaLoopHint  with c++11 attribute.
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>All
          </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>jennifer.yu@intel.com
          </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>The following test assert.  This is regress from change of 
commit 9c2e770034d04a0966b84cac14a9e3fb3b0d4ab7

bash-4.4$ clang -cc1 x.cpp
clang: /export/iusers/jyu2/git/llorg/llvm/clang/lib/Parse/ParseStmt.cpp:2199:
clang::StmtResult
clang::Parser::ParsePragmaLoopHint(clang::Parser::StmtVector&,
clang::Parser::ParsedStmtContext, clang::SourceLocation*,
clang::Parser::ParsedAttributesWithRange&): Assertion
`Attrs.Range.getBegin().isInvalid() && "start of attribute range already set"'
failed.
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace, preprocessed source, and associated run script.


bash-4.4$ cat x.cpp

void foo(int i) {
  switch (i) {
  case 1:
    #pragma unroll
    [[fallthrough]];
  case 2:
    for (int i = 0; i < 10; ++i);
    break;
  }
}</pre>
        </div>
      </p>


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