#0  pkgPolicy::GetCandidateVer (this=0x9275e78, Pkg=...) at policy.cc:180
        Prio = <optimized out>
        VF = {<pkgCache::Iterator<pkgCache::VerFile, pkgCache::VerFileIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::VerFile, int, pkgCache::VerFile*, pkgCache::VerFile&>> = {<No data fields>}, _vptr.Iterator = 0x156b50, S = 0xb6114960, Owner = 0x9276848}, <No data fields>}
        instVer = false
        Ver = {<pkgCache::Iterator<pkgCache::Version, pkgCache::VerIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::Version, int, pkgCache::Version*, pkgCache::Version&>> = {<No data fields>}, _vptr.Iterator = 0x1569c0, S = 0xb6127600, Owner = 0x9276848}, <No data fields>}
        Max = 0
        Pref = {<pkgCache::Iterator<pkgCache::Version, pkgCache::VerIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::Version, int, pkgCache::Version*, pkgCache::Version&>> = {<No data fields>}, _vptr.Iterator = 0x1569c0, S = 0xb5cbc000, Owner = 0x9276848}, <No data fields>}
        MaxAlt = 0
        PrefAlt = {<pkgCache::Iterator<pkgCache::Version, pkgCache::VerIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::Version, int, pkgCache::Version*, pkgCache::Version&>> = {<No data fields>}, _vptr.Iterator = <optimized out>, S = 0x0, Owner = 0x0}, <No data fields>}
#1  0x00bc42a2 in GetCandidateVer (Pkg=<optimized out>, this=<optimized out>) at ../build/include/apt-pkg/depcache.h:355
No locals.
#2  pkgDepCache::Init (this=0x9263a08, Prog=0xbf8ca024) at depcache.cc:149
        State = @0xb5b17768
        I = {<pkgCache::Iterator<pkgCache::Package, pkgCache::PkgIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::Package, int, pkgCache::Package*, pkgCache::Package&>> = {<No data fields>}, _vptr.Iterator = 0xc97648, S = 0xb6042e20, Owner = 0x9276848}, HashIndex = 913}
        actions = {cache = @0x9263a08, released = false}
        Done = -1246660760
#3  0x00bf7339 in pkgCacheFile::BuildDepCache (this=0x9262ac0, Progress=0xbf8ca024) at cachefile.cc:143
No locals.
#4  0x00bf73d4 in pkgCacheFile::Open (this=0x9262ac0, Progress=0xbf8ca024, WithLock=false) at cachefile.cc:158
No locals.
#5  0x0012a322 in Open (Progress=..., this=0x9262ac0, WithLock=<optimized out>) at /usr/include/apt-pkg/cachefile.h:69
No locals.
#6  PkgCacheNew (type=0x158a20, Args=Traceback (most recent call last):
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 1099, in to_string
    return pyop.get_truncated_repr(MAX_OUTPUT_LEN)
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 183, in get_truncated_repr
    self.write_repr(out, set())
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 1003, in write_repr
    for i in safe_range(int_from_int(self.field('ob_size'))):
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 156, in field
    return self._gdbval.dereference()['ob_base'][name]
gdb.error: There is no member named ob_base.
, kwds=0x0) at python/cache.cc:395
        progress = {<OpProgress> = {_vptr.OpProgress = 0x156ca8, Current = 0, Total = 100712, Size = 50356, SubTotal = 50356, LastPercent = 21.0104065, LastTime = {tv_sec = 1333208898, tv_usec = 460544}, LastOp = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x9277104 "Building dependency tree"}}, LastSubOp = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x92761e4 "Candidate versions"}}, Op = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x9277104 "Building dependency tree"}}, SubOp = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x92761e4 "Candidate versions"}}, Percent = 21.7451744, MajorChange = false}, <PyCallbackObj> = {callbackInst = Traceback (most recent call last):
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 1099, in to_string
    return pyop.get_truncated_repr(MAX_OUTPUT_LEN)
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 183, in get_truncated_repr
    self.write_repr(out, set())
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 486, in write_repr
    self.safe_tp_name(), pyop_attrdict, self.as_address())
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 383, in _write_instance_repr
    for pyop_arg, pyop_val in pyop_attrdict.iteritems():
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 622, in iteritems
    for i in safe_range(self.field('ma_mask') + 1):
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 159, in field
    return self._gdbval.dereference()[name]
gdb.error: There is no member named ma_mask.
, _save = 0x912fa44}, <No data fields>}
        pyCallbackInst = Traceback (most recent call last):
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 1099, in to_string
    return pyop.get_truncated_repr(MAX_OUTPUT_LEN)
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 183, in get_truncated_repr
    self.write_repr(out, set())
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 486, in write_repr
    self.safe_tp_name(), pyop_attrdict, self.as_address())
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 383, in _write_instance_repr
    for pyop_arg, pyop_val in pyop_attrdict.iteritems():
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 622, in iteritems
    for i in safe_range(self.field('ma_mask') + 1):
  File "/tmp/tmpmoCHFE/usr/lib/debug/usr/bin/python2.7-gdb.py", line 159, in field
    return self._gdbval.dereference()[name]
gdb.error: There is no member named ma_mask.
.
        kwlist = {0x13eca0 "progress", 0x0}
        Cache = 0x9262ac0
        CacheFileObj = <optimized out>
        CacheObj = <optimized out>
#7  0x0814970a in type_call.25315 ()
No locals.
#8  0x08149aff in PyObject_Call ()
No locals.
#9  0x08157886 in PyEval_EvalFrameEx ()
No locals.
#10 0x081842f0 in PyEval_EvalCodeEx ()
No locals.
#11 0x0815749c in PyEval_EvalFrameEx ()
No locals.
#12 0x081842f0 in PyEval_EvalCodeEx ()
No locals.
#13 0x08194fd1 in PyRun_SimpleFileExFlags ()
No locals.
#14 0x08198cf9 in Py_Main ()
No locals.
#15 0x0805e93b in main ()
No locals.