<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 compiler crashes"
   href="https://bugs.llvm.org/show_bug.cgi?id=42898">42898</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Clang compiler crashes
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>6.0
          </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++17
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>agner@agner.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>blitzrakete@gmail.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=22345" name="attach_22345" title="Test case">attachment 22345</a> <a href="attachment.cgi?id=22345&action=edit" title="Test case">[details]</a></span>
Test case

The attached test case makes clang crash.

The error is detected on Clang version 6.0.0-1ubuntu2 under Windows subsystem
for Linux, Win 10.

The error does not occur under Cygwin64.

clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)

Complete crash report is included as a comment in test.cpp

Command line: clang -m64 -std=c++17 -O2 -mavx  test.cpp

I cannot produce a minimal test case because the error disappears even when I
remove seemingly irrelevant code.</pre>
        </div>
      </p>


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