[LLVMbugs] [Bug 11124] New: Virtual inheritance segfault

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=11124

           Summary: Virtual inheritance segfault
           Product: clang
           Version: 2.9
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: tomboshoven at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


The following C++ code gives a segfault when executed.

struct Base
{
    const int text;
    Base():text(1) {}
    Base(int aText)
    : text(aText) {}
};
struct SubA : public virtual Base
{
protected:
  int x;
public:
  SubA(int aX)
  : x(aX) {}
};
class SubB : public virtual Base
{};
struct Diamond : public SubA, public SubB
{
    Diamond(int text)
    : Base(text), SubA(5), SubB() {}

    void printText()
    {
        if(text != 2)
          __builtin_abort();
        if(x!=5)
          __builtin_abort();
    }
};

int main(int, char**)
{
    Diamond x(2);
    x.printText();
}

Incidentally, the same problem existed as a regression in gcc:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50618

Compilation was done on clang version 2.9 (tags/RELEASE_29/final).
Target: x86_64-unknown-linux-gnu.
Default Arch Linux distribution.

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