<html>
    <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 --- - Assertion failed: (I != Vec.end() && "list does not contain decl"), function remove, file ../../tools/clang/include/clang/AST/DeclContextInternals.h, line 116."
   href="https://llvm.org/bugs/show_bug.cgi?id=26917">26917</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Assertion failed: (I != Vec.end() && "list does not contain decl"), function remove, file ../../tools/clang/include/clang/AST/DeclContextInternals.h, line 116.
          </td>
        </tr>

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

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

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

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>#!/bin/bash

cat > reduced.c <<-EOF
  #import <resolv.h>
EOF

mkdir -p "${PWD}/ModuleCache"
bin/clang -cc1 -triple x86_64-apple-macosx10.11.0 -emit-pch -fmodules
-fimplicit-module-maps -fmodules-cache-path=${PWD}/ModuleCache -o $$.pch.pch -x
c-header - <<< '#include <dlfcn.h>'
bin/clang -cc1 -triple x86_64-apple-macosx10.11.0 -emit-obj -include-pch
$$.pch.pch -fmodules -fimplicit-module-maps
-fmodules-cache-path=${PWD}/ModuleCache -o $$.o -x c reduced.c

This relies on a Darwin host due to the header usage.  Ive not had a chance to
reduce this further into a standalone test case unfortunately.  This was
against SVN r263285.</pre>
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