xpyb version 1.2-2build1 FTBFS on i386 in precise

This is a semi-automatic report based on the latest archive rebuild results [1].
Apologies if it reaches you in error.

Excerpt from the buildlog:

python2.7 ../../src/py_client.py -p /usr/lib/python2.7/dist-packages /usr/share/xcb/xproto.xml
Traceback (most recent call last):
  File "../../src/py_client.py", line 620, in <module>
    module.generate()
  File "/usr/lib/python2.7/dist-packages/xcbgen/state.py", line 101, in generate
    item.out(name)
  File "../../src/py_client.py", line 360, in py_struct
    _py_complex(self, name)
  File "../../src/py_client.py", line 324, in _py_complex
    _py(' self.%s = xcb.List(self, count, %s, %s, %d)', _n(field.field_name), _py_get_expr(field.type.expr), field.py_listtype, field.py_listsize)
  File "../../src/py_client.py", line 275, in _py_get_expr
    lenexp = _py_get_length_field(expr)
  File "../../src/py_client.py", line 261, in _py_get_length_field
    if hasattr(expr.parent.parent, "opcode"):
AttributeError: 'ListType' object has no attribute 'parent'
make[3]: *** [xproto.py] Error 1
make[3]: Leaving directory `/build/buildd/xpyb-1.2/build-python2.7/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/xpyb-1.2/build-python2.7'
make[1]: *** [override_dh_auto_build] Error 2
make[1]: Leaving directory `/build/buildd/xpyb-1.2'
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20120212-1143
FAILED [dpkg-buildpackage died]

The full buidlog can be found at https://launchpad.net/ubuntu/+archive/test-rebuild-20120201/+build/3176798/+files/buildlog_ubuntu-precise-i386.xpyb_1.2-2build1_FAILEDTOBUILD.txt.gz.

[1] http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20120201-precise.html