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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 - Reparse with #ifdef leads to error "unterminated conditional directive""
   href="https://bugs.llvm.org/show_bug.cgi?id=34547">34547</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Reparse with #ifdef leads to error "unterminated conditional directive"
          </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>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>libclang
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>nikolai.kosjar@qt.io
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>klimek@google.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>This happens for 5.0 and trunk.

 % cat $FILE
 #ifdef FOO
 void f();
 #endif
 %

Parsing this file results in no diagnostics, as expected:
 % ./c-index-test -test-load-source none $FILE                                
 %

When reparsing, wrong diagnostics are emitted:
 % CINDEXTEST_EDITING=1 ./c-index-test -test-load-source none $FILE          
 /home/nik/work/preambleBug/ifdef.cpp:1:2: error: unterminated conditional
directive
 Number FIX-ITs = 0
 /home/nik/work/preambleBug/ifdef.cpp:3:2: error: #endif without #if
 Number FIX-ITs = 0
 %</pre>
        </div>
      </p>


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