<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 - Memory Region command causes segfault"
   href="https://bugs.llvm.org/show_bug.cgi?id=37577">37577</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Memory Region command causes segfault
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>lldb
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </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>All Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>lldb-dev@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>maxshavrick@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=20336" name="attach_20336" title="Screenshot of it">attachment 20336</a> <a href="attachment.cgi?id=20336&action=edit" title="Screenshot of it">[details]</a></span>
Screenshot of it

(* This is lldb lldb-902.0.79.2\n Swift-4.1 *)

When using `memory region` command twice, there is a segmentation fault. Steps
as follows:

$lldb ./test_program
(lldb) process launch --stop-at-entry
(lldb) ni
(lldb) ni
(lldb) register read rsp
     rsp = 0x00007ffeefbff5c8
(lldb) memory region 0x00007ffeefbff5c8
(lldb) memory region

Note the last memory region line I do not pass an address to. Should show the
help screen again. 

Thank you
Max</pre>
        </div>
      </p>


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