<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 --- - [ms] longjmp doesn't work with /MD (or /MDd) in 64-bit binaries with optimizations"
   href="http://llvm.org/bugs/show_bug.cgi?id=22421">22421</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[ms] longjmp doesn't work with /MD (or /MDd) in 64-bit binaries with optimizations
          </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>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>Frontend
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>nicolasweber@gmx.de
          </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>D:\src\llvm-ninja-rel64>type jmp_set.cc
#include <setjmp.h>

struct Base {
  virtual void vfun(int argc, char* argv[]) {};
  virtual bool fail() {}
};

struct Sub : Base {
  bool f(int argc, char* argv[]) {
    jmp_buf buf;
    if (setjmp(buf))
        return fail();

    int sum = 0;
    for (int i = 0; i < argc; ++i)
      sum += argv[i][0];

    longjmp(buf, 1);
  }
  virtual void vfun(int argc, char* argv[]) {
    f(argc, argv);
  }
};

int main(int argc, char* argv[]) {
  Base* b = new Sub;
  b->vfun(argc, argv);
}

D:\src\llvm-ninja-rel64>bin\clang-cl -m64 jmp_set.cc /MD
jmp_set.cc(5,24) :  warning: control reaches end of non-void function
[-Wreturn-type]
  virtual bool fail() {}
                       ^
1 warning generated.

D:\src\llvm-ninja-rel64>jmp_set


crashes!</pre>
        </div>
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