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      <base href="https://bugs.llvm.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [FileCheck] FILECHECK_DUMP_INPUT_ON_FAILURE and FILECHECK_OPTS should be usable for FileCheck test suite"
   href="https://bugs.llvm.org/show_bug.cgi?id=40284">40284</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[FileCheck] FILECHECK_DUMP_INPUT_ON_FAILURE and FILECHECK_OPTS should be usable for FileCheck test suite
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Test Suite
          </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>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>lit
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>dan@su-root.co.uk
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>daniel@zuster.org, jdenny.ornl@gmail.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Right now setting FILECHECK_DUMP_INPUT_ON_FAILURE and/or FILECHECK_OPTS in
environment variables can break running the FileCheck test suite because this
changes the output of the FileCheck under test.

We should fix this so that we make a distinction between the FileCheck under
test and the FileCheck being used to check FileCheck by unsetting the
environment variables for the former.

A simpler work around is available in <a href="https://reviews.llvm.org/D56541">https://reviews.llvm.org/D56541</a> but it is
not an ideal solution.</pre>
        </div>
      </p>


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