#0  0x00007f23e8405dc6 in pkgDepCache::ActionGroup::release (
    this=0xae00000044) at ../build/include/apt-pkg/cacheiterators.h:192
No locals.
#1  0x00007f23e86e0392 in PkgActionGroupExit (Self=<value optimized out>, 
    Args=<value optimized out>) at /usr/include/apt-pkg/cacheiterators.h:192
	ag = <value optimized out>
#2  0x0000000000423a87 in PyObject_CallFunctionObjArgs (callable=0x1ef7950)
    at ../Objects/abstract.c:381
	args = (PyObject *) 0x1ef67d0
	tmp = (PyObject *) 0x0
	vargs = {{gp_offset = 32, fp_offset = 48, 
    overflow_arg_area = 0x7fff1ee22620, reg_save_area = 0x7fff1ee22540}}
#3  0x0000003000000020 in ?? ()
No symbol table info available.
#4  0x00007fff1ee22620 in ?? ()
No symbol table info available.
#5  0x00007fff1ee22540 in ?? ()
No symbol table info available.
#6  0x000000000086e0c0 in ?? ()
No symbol table info available.
#7  0x000000000086e0c0 in ?? ()
No symbol table info available.
#8  0x00000000008793c0 in ?? ()
No symbol table info available.
#9  0x00000000008793c0 in ?? ()
No symbol table info available.
#10 0x00000000008793c0 in ?? ()
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.