C++ crash on hppa

[Will Newton <will@misconception.org.uk>]

I have a package that works perfectly on i386 but crashes on hppa. The code 
is not anything that would be directly affected by the underlying hardware - 
it makes no assumptions based on endianess or word size - and the crash 
occurs because of a free of a null pointer inside the STL. I have attached 
the backtrace. I'm really quite stumped by this one, so any help would be 
greatly appreciated.

(gdb) bt
#0  0x4071210c in __libc_free (mem=0x0) at malloc.c:3142
#1  0x0002e95c in std::__malloc_alloc_template<0>::deallocate(void*, unsigned)
    ()
#2  0x0002de54 in std::__default_alloc_template<true, 0>::deallocate(void*, 
unsigned) ()
#3  0x0002cd40 in std::allocator<char>::deallocate(char*, unsigned) ()
#4  0x0002aa20 in std::string::_Rep::_M_destroy(std::allocator<char> const&) 
()
#5  0x00028230 in std::string::_Rep::_M_dispose(std::allocator<char> const&) 
()
#6  0x00028a58 in std::string::assign(std::string const&) ()
#7  0x4019e93c in Aqsis::CqOptions::InitialiseDefaultOptions() (
    this=0x402c2a9c) at /usr/include/c++/3.2/bits/basic_string.h:338
#8  0x4019d9dc in CqOptions (this=0x402c2a9c) at options.cpp:193
#9  0x401e81c0 in __static_initialization_and_destruction_0 (__initialize_p=1,
    __priority=65535) at renderer.cpp:50
#10 0x402061ec in _GLOBAL__I__ZN5Aqsis13pCurrRendererE ()
    at /usr/include/c++/3.2/bits/stl_iterator.h:622
#11 0x40272be8 in __do_global_ctors_aux () from /usr/lib/libaqsis.so.0
#12 0x4015dc4c in _init () from /usr/lib/libaqsis.so.0
#13 0x4000cf8c in call_init () from /lib/ld.so.1
#14 0x4000d0fc in _dl_init () from /lib/ld.so.1
#15 0x400023dc in _dl_start_user () from /lib/ld.so.1
(gdb)

Thanks,