[gentoo-alt] bizarre problem emerging sympy on OS X

[François Bissey]

Hi,

I am puzzled by a problem I suddenly have emerging dev-python/sympy
in my prefix on OS X 10.5.8:
 * Building of dev-python/sympy-0.7.2 with CPython 2.7...
python2.7 setup.py build -b build-2.7
python2.7(34113) malloc: *** error for object 0x29f10b0: Non-aligned pointer 
being freed (2)
*** set a breakpoint in malloc_error_break to debug
Assertion failed: (ob_refcnt == 0), function ~PythonExtensionBase, file 
CXX/Python2/cxx_extensions.cxx, line 1320.
/Users/frb15/Desktop/Gentoo/var/tmp/portage/dev-
python/sympy-0.7.2/temp/environment: line 1208: 34113 Abort trap              
"$(PYTHON)" "${setup_file#*|}" "${_DISTUTILS_GLOBAL_OPTIONS[@]}" build -b 
"$(_distutils_get_build_dir)" "$@"
 
The funny thing is, if I go into the build directory and execute 
python2.7 setup.py build -b build-2.7
everything works fine. I am supposing that some environment is messing up with
the ebuild. Any ideas? Does it need to be ported to python-r1 in short order?
All other python packages I tried have been fine.

Francois