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    <head>
      <base href="https://llvm.org/bugs/" />
    </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 --- - Emacs clang-format functions don't work when narrowing is in effect"
   href="https://llvm.org/bugs/show_bug.cgi?id=29073">29073</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Emacs clang-format functions don't work when narrowing is in effect
          </td>
        </tr>

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

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

        <tr>
          <th>Component</th>
          <td>Formatter
          </td>
        </tr>

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

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

        <tr>
          <th>CC</th>
          <td>djasper@google.com, klimek@google.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The following invocation (to be modified depending on load path of
clang-format.el and location of the clang-format binary)

emacs -batch -q -l clang-format -eval '(progn (write-region "int a;\n" nil
"/tmp/clang.cpp") (find-file "/tmp/clang.cpp") (narrow-to-region 2 3)
(clang-format-buffer))'

results in an error

(clang-format failed with code 1: error: offset 1 is outside the file)

because clang-format-region passes only the accessible portion of the buffer to
the clang-format subprocess, not the entire buffer.  Possible (untested)
solution: In clang-format.el, replace (call-process-region (point-min)
(point-max) …) with (call-process-region nil nil …).</pre>
        </div>
      </p>
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