At the URL you will find a simple test case.  I had others run this case on
their mac, and it was 
confirmed to die in the front end.  Changing backends did not alter the error
message at all.  Error 
message (as noted in file) was:

testcase.cpp: In member function `T& Array<T>::append() [with T =
double[4][4]]':
testcase.cpp:147: internal compiler error: Bus error

Here's a reduced testcase:

---
typedef unsigned int size_t;
extern "C++" {
  inline void* operator new(size_t, void* __p) throw() { return __p; }
  inline void* operator new[](size_t, void* __p) throw() { return __p; }
}
typedef double Ty[4];

void foo(Ty *XX) {
  new(XX) Ty();
}
---

I don't have time right this second to look into this any more, but hopefully
I'll get it fixed by tonight.

-Chris

Okay, this was actually a trivial bug to fix.  Here's the testcase:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050221/024325.html

and here's the patch:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050221/024326.html

Thanks for the report!

-Chris