<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 - use-after-free or Assertion `Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofDat a()'."
   href="https://bugs.llvm.org/show_bug.cgi?id=33485">33485</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>use-after-free or Assertion `Tok.is(tok::eof) && Tok.getEofData() == AttrEnd.getEofDat a()'.
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </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>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>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>kcc@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>r305508, x86_64 linux. 

echo Y2Fzc/9Ge2M8KEYoKEazRig7OykpKSko | base64 -d  | clang -x c++ - 

tools/clang/lib/Parse/ParseExprCXX.cpp:3173: ExprResult
clang::Parser::ParseCXXAmbiguousParenExpression(clang::Parser::ParenParseOpt
ion &, ParsedType &, clang::BalancedDelimiterTracker &,
clang::ColonProtectionRAIIObject &): Assertion `Tok.is(tok::eof) &&
Tok.getEofData() == AttrEnd.getEofData()' failed.

in a no-assert build this manifests as 20-byte read-heap-use-after-free in
clang::TokenLexer::Lex(clang::Token&) 

found by clang-fuzzer</pre>
        </div>
      </p>


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