<html>
    <head>
      <base href="http://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 --- - Gold plugin crash when given old debug info"
   href="http://llvm.org/bugs/show_bug.cgi?id=22713">22713</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Gold plugin crash when given old 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>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>DebugInfo
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>rafael.espindola@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=13951" name="attach_13951" title="testcase">attachment 13951</a> <a href="attachment.cgi?id=13951&action=edit" title="testcase">[details]</a></span>
testcase

The attached testcase is the output of "clang -gline-tables-only" on

void f(void) {}

When running

$ ld -plugin ./build/lib64/LLVMgold.so -shared 3.5.bc  -o t.so

with a trunk plugin we get a crash:

/home/espindola/llvm/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:1329: void
llvm::DwarfDebug::recordSourceLine(unsigned int, unsigned int, const
llvm::MDNode *, unsigned int): Assertion `Scope.isScope()' failed.

The issue is that UpgradeDebugInfo is called from MaterializeModule, which the
plugin tries very hard to avoid.</pre>
        </div>
      </p>
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