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      <base href="https://llvm.org/bugs/" />
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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 --- - Regression(r273807): Assertion failed: UndefinedSubrange || ElementSize == Size when building chrome/win with debug info"
   href="https://llvm.org/bugs/show_bug.cgi?id=28311">28311</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Regression(r273807): Assertion failed: UndefinedSubrange || ElementSize == Size when building chrome/win with debug info
          </td>
        </tr>

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

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

        <tr>
          <th>Component</th>
          <td>DebugInfo
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>nicolasweber@gmx.de
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre><a href="https://build.chromium.org/p/chromium.fyi/builders/CrWinAsan/builds/3718/steps/compile/logs/stdio">https://build.chromium.org/p/chromium.fyi/builders/CrWinAsan/builds/3718/steps/compile/logs/stdio</a>

[602/30294] CXX obj\third_party\modp_b64\modp_b64_win64.modp_b64.obj
FAILED: obj/third_party/modp_b64/modp_b64_win64.modp_b64.obj 
ninja -t msvc -e environment.x64 --
"..\..\third_party/llvm-build/Release+Asserts/bin/clang-cl" -m64 /nologo
/showIncludes /FC @obj\third_party\modp_b64\modp_b64_win64.modp_b64.obj.rsp /c
..\..\third_party\modp_b64\modp_b64.cc
/Foobj\third_party\modp_b64\modp_b64_win64.modp_b64.obj
/Fdobj\third_party\modp_b64\modp_b64_win64.cc.pdb 
Assertion failed: UndefinedSubrange || ElementSize == Size, file
C:\b\build\slave\CrWinAsan\build\src\third_party\llvm\lib\CodeGen\AsmPrinter\CodeViewDebug.cpp,
line 961
Wrote crash dump file
"C:\Users\CHROME~1\AppData\Local\Temp\clang-cl.exe-d44a56.dmp"
#0 0x0000000140a03255
(C:\b\build\slave\CrWinAsan\build\src\third_party\llvm-build\Release+Asserts\bin\clang-cl.exe+0xfe3255)


That's very early in the build, so I'd expect this to repro eg in self-host
clang builds (or when building any project really).</pre>
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